Hose Bib Backflow Preventer
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- เผยแพร่เมื่อ 9 ก.ค. 2019
- I show you in this video a hose bib Backflow preventer and how it works. It is often called a vacuum breaker or anti siphon device. It is designed to keep contaminated water from flowing back into your house. Current plumbing codes do require a hose bib vacuum breaker, anti siphon backflow preventer on each hose bib and I also recommend that you install these on your house if you do not have them based on the horror stories I've heard in the backflow continuing education classed I have taken. When everything on your house that has to do with water is working perfectly, you may not need a backflow preventer. But for the times things go wrong, you want to be protected with a backflow preventer on your hose bib as well as your sprinkler system and any other cross connection where contaminated water could be sucked back into the main water supply. I think it is wise to stay safe and have one of these vacuum breakers installed.
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Watch another video about the hose bib backflow preventer here:
th-cam.com/video/CUwowYO6Yao/w-d-xo.html
Backflow preventer bib new to me. Thanks
This sounds like something you don’t really need. How is the water going to back flow past a closed ball valve in the spigot?
I did some research on it, and the channel "Watts Water" explains backflow pretty well in a brief explanation. Backflow isnt something that occurs all the time, but in the instance some contaminated water gets in your hose (probably clorine or stagnant water), you dont want it to have the possibility of going back into your plumbing and ruining your pipes and possibly your drinking water filters and stuff. Thats why this thing is here.
Another channel is "American Backflow Products" and they go into visual detail of how backflow works
I agree, how does water back flow through a closed ball valve? Sounds like nonsense to me…
Thank you for explaining what it is used for. I was going to remove the one's on my house, but now I see where I just simply need to replace them. AWESOME!
My restricter sprays water when I turn on the water and turn off, it also leaks water everywhere while I'm using my sprayer. What a great device!
Yeah I just got done cutting mine off. Worlds better than getting sprayed every time I turn the damn hose on or off.
If your place "came" with the vacuum breaker already attached to the bib (supply valve), then that might mean that someone else had it on there because it was a _code_ requirement. That vac-breaker should only let out a big squirt of water (for a very short duration) when closing the supply valve after having used your hose. Sounds like it's time for a new vac-breaker, just a few bucks at any home improvement center. If you go that way, remember to scrub off the bib's threads with a wire brush before installing the new vac-breaker.
@@hlcepeda Well it is probably some sort of nanny code that someone came up with. I could care less. I save the second one and will screw it back on when I move someday, but I will never put one on for use again. I fast pitched the first one as soon as I got it off and it is gone for good.
Same deal, it’s a piece of shit. No idea what the point of it is, and the hose attached to it sprays water everywhere
I always thought my hose was broken. Now I know it was a backflow preventer doing its job from getting us all sick. LOL. Thanks!
Thanks, mate! A very good demonstration of how backflow can occur & why a Vacuum Breaker is important.
Pushing back the same water that's flowing out. Brilliant.
Thank you for the ultra clear explanation and demo. Right now I have no back flow preventer but I only have a garden hose + nozzle connected to it. No contamination possibilities. But I am thinking of installing a drip line system for automatic watering and I didn't understand why they were talking about back flow preventers. Now I do. It is very clear. Thank you very much for your video.
I'm glad this was a help to you. Check out this video on the best place to install a backflow preventer if you plan to use a tap timer for the new drip zone. It may be of some help.
th-cam.com/video/CUwowYO6Yao/w-d-xo.html
Hey so are you saying because you only have a garden hose it's not necessary to use a backflow preventer? I have a dual faucet with a soaker and garden hose connected, do you think I need a backflow preventer?
Good information, simple measures go a long way. A good, conscientious gardener will point these issues out and take care of them immediately.
A very interesting and instructive demonstration and just what I was looking for! Much appreciated!
Sweet demonstration! Thanks
Thanks from the Florida Keys.
Our pleasure! Thanks for listening and commenting!
Great video. Your demonstration is awesome. I'm going to install it on my backyard hose bib. Thanks a lot.
You bet. Thank you
You will be sorry when you are soaking wet.
Great Video and explanation! thank you!
I just got one of those soft expanding water hoses and every time I turn off the water I get that bubble action. I kept trying to fix! I was so frustrated. I’m so glad I saw this on your video! Now I can relax and just water! lol Thank you!
Yes this happens with those type of hoses and when you leave a sprayer on the end of the hose.
the only logical reason for this is: if the water supply to the house should get turned off, this may prevent contamination possibilities, otherwise when attached to a hose spigot, it's only purpose is to relieve pressure on a charged hose when the valve is turned off
….exactly. They’re a pain in the butt!
And to spray the holy hell out of me when I turn off my flexi hose!
@@MM-sq5pf 😂‼️ Soaked rn from my flexi hose and this thing
Not entirely - a lot of modern spigots have vacuum breaks and suck the water back down if the end of the hose isn't entirely sealed. If you have a fertilizer injector in your irrigation system you risk sucking fertilizer back into your house water supply
really good explanation, thx!
I'm glad I happened to view your video!! I thought that my backflow device that I recently purchased was defective when I turned off the spigot and I saw water coming out from the small holes of the device.
Does it gushed a lot of water?
This video nonsense
But you CLOSED the spigot valve. How is water going to go back in if the valve is now closed?
YOu don't need one if your hose is NOT under pressure for it to back up. Like you said if you turn it off it should be closed off and can't back flow!!
If you watch the video, his hose is hooked up to the Sprinlkler System! Just not connected a hose you would use to spray down the patio....
@@robertsteinmetz4084 hi, I’m not trying to cause trouble and forgive me if I seem to be questioning you but I’m just trying to understand this idea of back flow.
Ok, so his water faucet is not connected to a regular water hose but a sprinkler system so there is pressure and back flow.
But if his value is closed then theoretically there can be no way for that back flow to go inside?
And when he opens the value to turn on the water doesn’t the water pressure push outward any contamination anyway so as to not go into the house?
I’m ignorant on this back flow idea so just asking to try and understand it??
I guess it’s only to protect you from those rare situations?
I think the only way to cause a contamination issue is if the water pressure in the house drops because someone turned off the water.
Then someone turns on an inside water causing water pressure to flow inside.
Then someone opens an outside faucet causing suction of an irritation system attached to a hose to have water flow inside from that hose. Seems to be an extremely rare event but nevertheless a possibility so I guess that’s what it’s for?
I would think people should worry more about eating expired food then to worry about this. Seems to be a bit overkill. But then again I know nothing of this back flow idea.
I’m just trying to analyze with limited knowledge plus logic?
Around here it "code" Big Backflow preventer strikes again!
I didn't know about that set screw at my other house and almost forgot about it today.
Here our homes are stucko and these pipes don't have much support, I nearly twisted the pipe inside the wall. Fortunately I figured it out before things got too bad. Hacksaw and Dremmel tools. Yikes, now I have to try finding the broken set screw at this house. Why are these on the underside and nearly impossible to get to? 🤔
I'am Your Newest Subscriber Great Videos
Thanks for this info, so why does it spray water when I connect the hose.
Thanks for this information. I have an above ground sprinklers, but some out in the yard are in conduit to save time moving hoses. Right now I have the back flow added just before the sprinkler head, Is this okay too?
This is great info. I thought something was wrong with my spigot since water was squirting out after I turned off the water hose. I didn't even know I had a blackflow preventer installed.
I'm glad this helped.
@@AmericanIrrigator it helped me too. I was going crazy thinking there was something wrong with my hose or faucet.
Its for inspection but your water system is constantly pressurized whatever tiny amount goes back in will be what's in the pipes or hose already
Always wondered why that connector sprayed water inside my garage every time I turned off the water. Annoyed me for years until I finally had enough and removed it. Thanks for letting me see what was going on. Poorly designed fix for a problem that doesn't exist. If the faucet is turned off, water can't backflow past it into the house anyways.
Nailed it.
LOL wth i just realized this also. When i close my faucet
I’ll be setting up the same type of irrigation system and was worried about the back flow when shutting off the water, thanks for such a simple explanation.
You are welcome
Read my explanation - there is no backflow from the sprinkler pop up risers and what he said in this video is complete nonsense!!!
I second this i know I'm late but id just like to provide a second reference this video is nonsense the tiny amount of water that will go back will be clean it's what is in the hose or pipes the water line is constantly pressurized the guy sounds legit but he's wrong and these things fail 100% of the time they're so annoying loud too
@@rookiexreviewsthey are also a pain in the tail to remove once they have been on the faucet for a long time and require a lot of different tricks to get them off once seized onto the faucet. My house was built in 19' and they put one on each faucet. Two years later it took two big pipe wrenches and a propane torch after trying lots of penetration oil to get them loose. Took about an hour each one. I was mad the entire time trying to get the 5-6 off my faucets. They were causing extreme issues with water pressure.
Just removed both left from previous owner and which were rusted and prevented me from removing hose left on property AND ability to correct bad spray from hose... I demolished both in order to just have access to replacing old hose and resolve bad spraying.... And, thanks to THIS video, now I know I have to replace both with new valves.
What a pain. I just had to do the same thing to mine not long ago. This is why so many people are against these, but putting it back in with a new one is the right call. I replaced mine too. New Backflow preventer and hose.
@@AmericanIrrigator
Already on it. This weekend's project installing 2 new back flow siphon valves.
I have above ground impact sprinklers do I need this.
good info, thank you.
You’re welcome
Thxs for explanation.. I thought , something was wrong with my faucet .. but mine is leaking , tho .. gonna replace it . Thxs
I'm looking at running a water hose up a steep hill for a sprinkler system. Would this anti-siphon/backflow preventer be able to handle 100 hundred feet of water-filled hose 'back pressure' coming back at it without blowing through beyond the spigot?
The only way water can backflow back into your house is if the water pressure dropped coming from your house and the pressure beyond the spigot was higher than the pressure coming from the house. This is why water shoots back through the valve when you close the valve. The second the pressure at the valve is lower than the pressure built up inside your hose the water switches direction. This is why you won't get the water pressure release if your hose is wide open when closing the valve. Seems useless on a hose bib. Good idea for irrigation systems that could potentially get contamination in the irrigation lines.
Exactly. It is useless even you connect the hose to an irrigation system where the heads are always open and in a position on the ground where they can suck in contaminates. Even then, when the spigot is off, how is contaminated water going to get into the house? It can't! When the spigot is turned on, the water coming out is higher pressure than the hose to the irrigation system, do no water will be coming back in from the hose. These things are just useless problem makers.
+Max Carter
I understand where you are coming from and you do have some points. Most of the time you will be fine. This device is for the rare freak things that can happen. It is possible for backflow to accur that’s why I believe it is good to be safe and protected.
@@AmericanIrrigator If you still do this can you give us at least one or two cases when this can happen?
He can't. I've never heard of a single case where this hurt someone. Just an activist engineer came up with it, proved it could occur and waa laa, now problems and money galore for a preceived problem bloomed. Amazing that we weren't all dying from the lack of these for the first, what, 100 years. 🙄
My house came with those. They all leak and spray out the side almost as much as comes out the end of the hose. With set screw they are impossible to get off.
THE BEST DEMO with EXPLANATION about the hose to faucet vacuum breaker! Thank You!!
You are welcome!
I subscribed to this I just got a job as a irrigation tech and I really choose you as my TH-camr on the topic your flush
Welcome to our channel. I have been a licensed irrigator for over 10 years and I’ve learned a few things along the way. Some from other guys and some from trial and error. I’m trying share what I’ve learned. I hope you will learn something that will help you.
Those backflow preventers fail all the time. More useless, government mandated garbage. This is not consumer friendly at all.
i have that kind of adapter,but every time i turn on the water goes out on its side which the water back flow goes out,im not sure if i need some kind of adapter
Once you turn off your hose bib valve there is no backflow. A backflow only occurs when you've left the hose on and you may have a sprayer attached that is turned off and when you turn on water in the house then the water can enter through the hose bib water line and contaminate your water. This occurs due to a siphon effect. That's the only way a backflow system will prevent the house water from being contaminated.
Good example. You are right when talking about the siphon effect. That is one of the types of backflow that can occur. But don't forget about back pressure, which is the other type of backflow. That is the one that I give the example of in this video. When the spring in the heads pulls the riser down, it causes back pressure. Now as long as all the valves shut completely off and work properly, everything will be fine. But the reason you need a backflow prevention devise, is for when there is a failure in part of the system. Like if that hose bib valve does not shut off completely and is seeping by. If a backflow situation occurred, you come contaminate the water in the house if you are not protected with some type of backflow preventer.
Thanks. that will help me to pass inspection.
Good to hear
how does the water get into the house if the tap is off?
THANKS
Wish I had known about this before I was using hose end herbicides and fertilizers....
How can I get that tension screw off, the plumbers break the heads off on purpose ??
This backwards seal seems very tight if I press it with some metal piece. Is it normal?
Ours it doesn’t have a set screw and I try to change it cause it’s leaking when I attach the hose. I might cut it.
Just food for thought, if the valve is off how’s water gonna go back inside ?
Do those come in come in different sizes like 3/4 or 5/8 ?
Thanks! I have them on my bibs never sure how they actually worked.
Yea, and in a couple years you will wonder why they are there. Water will just come out around the spigot one day when you go to turn the water on. Now you need to get your drill out and fart around trying to get the thing off without ruining the threads on the spigot.
How do you remove this, mine seems like the screw cannot be taken of to loosen up
no man i'm taking mine off. I finally figured out the reason for the incessant humming that bothers our household and our neighbor's household whose master bedroom is within 15-20 feet of our hose bib. The sound is coming from the backflow preventer. Coming off
Yeah that could be annoying. But there must be a reason that is happening. Is the valve on all the time? If it is off it should not make any noise. Just something to check. These are not meant to be under pressure all the time. That is one thing that causes them to go bad. Good luck. Hope you get it solved.
I'll put a couple new ones on when I resell the house
The biggest 2 problems i see with these one, they restrict flow forward; and two, they maintain positive pressure between the actual frost free hydrant valve and the backflow preventer...this can be disastrous in the wintertime, as it defeats the putpose of the "frost-free hydtant" the trapped water then freezes and breaks your hydrant in the wall. A better solution is to buy the frost free hydrant with back flow preventers built in. If you have a "system" connected to your frost-free hydrant in the wintertime, that you have not completely drained and blown dry, you have other problems that perhaps should be covered on a different sort of video.
What is that white cap seen below the bib in this video? I have the same thing in almost the same location but not sure what it is. Thanks!
I think you are talking about the 1 1/2 cap with the raised square part on it. If so, that is the plumbing clean out for the kitchen sink at this house. If you had a clog in the plumbing there, a plumber might need to take that cap off and run a snake or other clean out tool to in clog the sink or pipes there. I hope this helps.
thanks
No problem
Whats the point of this device? Water cant go back in if it off. I dont have a sprinkler system. I prefer doing by hand. Anyway, in california i removed it because it was restricting flow causing my jet adapter to not work. I removed it and walla I had full pressure, i was able to get my pressure washer to finally operate correctly too. When backflow/water restricter was on my pressure washer would cut water flow every few seconds. After removal, worked like a charm.
For example let’s say your irrigation is “ON” right now then suddenly your house loses pressure due to a broken utility water line or you find a leak in your house plumbing so you run outside to shut off your main valve. That’s when a back flow preventer is needed. If your irrigation lines are at a higher elevation then the utility line breakage or your house plumbing breakage, the water along with contaminants from your irrigation line would get (sucked back), (siphoned),(back flow), (drained), toward your house plumbing due to loss of house pressure therefore contaminating your house plumbing. But remember, only if your irrigation is “ON” or if your irrigation timer kicks “ON” before your pressure is restored, you are at risk for line contamination. I hope this info helps people understand why and when we need back flow preventers, vacuum breakers and anti-siphon valves for our irrigation systems.
That is correct. Good example. That type of backflow is back siphonage. In this video I show the type of backflow that is called back pressure. where water is pushed back. Most of the time things work fine and there is no issues, but there are cases where a backflow situation can occur. So I think it is always a good idea too be protected. Thanks for your comment.
Does that happen often for you? I have owned more than 10 homes, and never once.
I dont understand how water can enter past the valve of the bib. Once you turn the faucet off -water stops coming out. Would that mean water can't go back up?
Yes it does. And in most cases when everything works perfect and works how it is supposed to work and used how it is supposed to be used, you would think that you do not need to have this Backflow device on your hose bib. But as we know things don't always work perfect, so it is a good idea to be safe than sorry. There could be a rare random case that a Backflow situation happened and contaminates got pushed or sucked back into your house. So these devises are a precaution. But as you see in this video, sprinkler heads to cause backflow so it is always a good idea to be protected. On new construction these are mandatory on all hose bibs. On full in ground sprinkler systems it is a state law to have a Backflow prevention device.
It doesn't make any sense to me, either. I've had two of these on my house (one front, one rear) and neither one of them works. The valve inside must be damaged, so all the water comes out the vent holes around the perimeter (see them at 0:35 ) and doesn't flow into the hose. Luckily, one of them still had the head of its set screw intact, so I was able to remove it. The other one had its set screw broken off, so I'm in the process of cutting it off the end of the faucet. I guess if the next homeowner wants/needs them, they can get new ones themselves. But it totally doesn't make any sense to have a non-repairable gadget (at least it seems unrepairable) near-permanently fastened to the end of a faucet.
I'm curious if one of these could be used as a backflow for a complete irrigation system rather than the more traditional expensive backflows?
No. You will need a testable device and one that is more reliable for an entire system.
@@AmericanIrrigator ahh ok. I was like, "why not one of these"
I have a leak…I located a pressure valve to the system but not backflow shut off valve handle. I found another box with the solenoid valves but not handle in them either. Any advice?
You may just have to shut off all the water at the water meter and get the leak fixed as fast as you can and get the water back on. This is what we do if we can’t find any shut off valve for the sprinkler system.
I'm in texas and we are required to have a backflow preventer for home sprinklers. Will one of these meet that requirement or does it need to be an "actual" system?
If the cross connection to the sprinkler system is off the main water supply then you need a backflow device like a PVB, RPZ, or double check depended on what your city requires. If the system is run off the hose bib but the hose bib is on all the time then you need a separate back flow device that is designed to be under pressure because these vacuum breakers are not designed to be under pressure all the time. But if you have a little system that runs off the hose bib and you only run it when you turn the hose bib on, then a vacuum breaker anti syphon device like this should work.
My backflow preventer valve does not spray me when I turn the water off. I’m wondering if it is working properly if it doesn’t spray.
Yeah. Sometimes it is hard to tell. But if there is no back pressure or even back siphonage, it won’t spray out. But if you leave a sprayer on the end of the hose it should spray out once you turn the hose bib off.
Thank you. This is very much my diy sprinkler system. My property is small. A hose Bibb, which is always on, supplies the water to a timer so I put HBVB on the outlet ports of the timer. That way the backflow preventer is not under constant pressure. Does this sound reasonable to you Sir?
I was thinking of a system like you suggested. Did you ever get some confirmation that this would prevent backflow?
@@jayc5695 I watched a few TH-cam channels and yes those backflow preventers apparently do work with an application like that. One was a pro, American Irrigator.
which company is this one from?
Is it supposed to spray people? We have old house and we thought it was broke.
Hi! Can I use this video for our company website? We’re in Texas .. we will mention your page too
The problem is that when I turn off the outdoor spigot, I get a shower because the backflow preventor sprays water several feet instead of just an inch or two like on this video. What is the fix for that?
Do you have a sprayer hooked onto the end of the hose or some sort of shut off valve or device at the end? If you have something like a sprayer on the hose, it will hold the pressure in the hose, so when you shut off the water it suddenly releases all that built up pressure. So the best way to turn a hose spigot off when you have a sprayer on it, is to keep the sprayer on by depressing the handle and keep the water flowing while you turn it off. This will keep it from shooting out and showering you liked that.
American Irrigator I had the same problem. And I tried what you suggested. Unfortunately, it did not make a difference. Any other tips ?
I’ve had the same back flow preventer on our spigot since we moved in about 4 years ago and now all of a sudden it started blasting water out when I shut it off. It seems like there’s more pressure in the hose now too.
Someone installed one onto my house. When it failed there was no easy way to remove it. I had to hacksaw it off.
So what if I only ever use the spigot with a garden hose attached to a standard garden spray head. When I turn off the valve it sprays water everywhere and can potentially damage my electric water pump which is right next to the spigot. My spigot is located inside my garage, not outside the home. I think it would be safe to remove the back flow preventer if I was only use it for a garden hose with a regular sprayer on the end. Like what contaminants would come from a hose that just leads to a sprayer?
It is spraying out cause of back pressure from the head, and the vacuum break backflow is relieving that pressure. You may could move it from inside to out by the head with a few different fittings. But if and animal urinated on that head or pesticide or other chemicals were sprayed on it, those things could enter the hose and be pushed or pulled up through the line into the water supply. This mainly will only happen when the system is running with the valve open. When you shut the valve and it shuts all the way, you should be ok. Just a few thoughts.
@@AmericanIrrigator thanks I appreciate the advice. Yeah for me I wouldn’t need to worry about pesticides or other animals getting involved because when I’m actively using the hose, it holding it in my hands with the sprayer. I just don’t see that ever happening where I would come in contact with something dangerous to the point that something would enter the head.
I installed a 3 station orbit timer to my spigot and each station has 3 heads off 3/4 inch polypipe. The anti syphon is built into the spigot but it randomly starts leaking through out sprinkling or when the heads go down , not sure , but will this help so that it doesn't burst off the gasket in the syphon valve?
It may help to install one of the on the down hill side of the valve/ time. I would try it.
@@AmericanIrrigator thank you I will try it, you got my subscription.
@@franciscobueno6589 Thanks!
I removed mine the other day….I guess it’ll be going back on now lol
Lol. I think it is for the better.
How can the water flow back into the house if the valve is closed?
Good question. When to valve closes completely there is really no way for water to backflow past the valve. But if the valve for some reason didn't close completely or shut all the way off, then you would have the potential of having a way for water to flow back past the valve. These situations don't happen very much, but it is good to be protected if they do.
But if you really think this through when you close your valve there is no water coming out .. now how can you put water back to your house through closed valve.. doesn’t make sense to me!
I was getting sprayed even if there is nothing on the end of my hose. I made a guard out of a 'Core Power' bottle. It fits perfectly on the valve, and the neck of the bottle was just large enough for my hose connector to fit through it. Now, the water runs straight down instead of spraying my jeans. I still hate it, but now, I am not pissed off every time I turn off the water. Used some heat to dull the sharp edges after cutting out the bottom of the bottle. I don't care what it looks like either. No more wet jeans.
Wow. Very innovative. Typically it only sprays out when the hose has a sprayer on the end and the hose is still under pressure. But these things are finicky sometimes.
I'm thinking if doing a similar thing with my spigot and make a guard for it. Mine sprays everytime I turn the water off from my garden hose while washing my car, watering the grass, etc. And the spigot is in my garage right next to drywall! Just destroys it. Making a guard is my only option.
@@bymitten1 I hear ya. I lived with getting sprayed for 20 years at my other house. I even took a hack saw to it and replaced it. Still sprayed me. I think the holes are too small. I was thinking of drilling some out, but the guard works, so why bother?
Does turning the valve off ONLY stop water from coming out? I understand what the backflow preventer is supposed to do but doesn't turning the valve off do the same thing?
Yes, most of the time. This is a protection device for when things malfunction or do not work properly, like a valve not shutting off all the way, or a water main beak while you are filling up the pool, just for example.
I have that device, but water is gushing out of those holes when water is on. Does it need to be replaced?
Unfortunately probably so. If you can get it off in one piece, you may be able fix the spring and rubber piece that closes off the holes when on. But I’ve never been able to fix one. Every time I have one go bad we just replace it.
How the water go back into the house if the water valve is off?
Good question. If the valve does shut off all the way, water will not flow back past it. But if the valve doesn’t get shut off all the way or won’t shut all the way and there is a backflow situation, then you may have a problem.
your videos are really helping me, I'm taking my LARE exam and have been struggling with irrigation
How can you tell if the back flow preventer is failing and needs replacement? I'm guessing they don't last forever.
No, unfortunately they do not last forever. If it ever starts to leak real bad when the water is on, it might be time to replace it. I'll dig into some more facts for you and see what I come up with.
@@AmericanIrrigator u
how is anything gonna go back into the house if the house water pressure is always higher than the outside factors???? i dont get it.
Well if there was ever a main line break on or near your property, this would cause a negative pressure on the main water supply causing a back syphon backflow which is why you always need a backflow device.
Don't understand, how when you close the water valve wouldn't that action prevent back flow? If your valve was still open a little after turning it off (leaking) wouldn't the water pressure itself prevent a back flow situation? Is the pressure in the hose end of the system greater that the service water pressure? I don't think so, but I'm no expert.
Total gimmick. Apparently the spicket cannot stop the the hose pressure from sneaking back into the main line.
@@nickc2708 ...If the spigot can stop your home water pressure from leaking out when it's shut off there's no way ANY liquid can be sucked back.PERIOD total junk IMO
Just removed it. Hate it everytime i shut off my valve it leaks all over tge patio causing mosquitos and water waste.
You don't get it.
I don't see any point of these for a hose spigot... And definitely skip installing those set screws that sheer off
Was not a problem for the first 100 years. Your right.
Do you lose any pressure to sprinklers?
No. This should not reduce the pressure any.
Not sure how water could flow back into your house if the valve is shut off. The water pressure from inside must be significantly more than the water coming from the hose, and if the valve is shut, how can water pass through? There is backflow which somehow can pass through a closed valve? Seems impossible.
As long as the valve gets shut off all the way, you are right, water can't go back past the valve. But there are freak things that happen that can cause a back siphonage or you can see here that the heads cause a back pressure situation. Either way it is good to be protected.
They should have made it easier to replace. That break away set screw is horrible.
I need a check valve to stop reverse clean water (hot into cold line and cold into hot line) i need a check valve fitting that will stop that that does not puke all over!!!! I would be using it indoors... do they make something like this?????
There are in line check valves and I think you can get them in any size. Check your local plumbing supply store, they should have what you need.
Someone please explain to me how water would go back into my house when I close the valve, as demonstrated here. After all, the valve is... closed. Without this backflow preventer, the pressure generated from the heads going down would cause water to spray out from the heads instead. Seems to me that this setup is what is causing the behavior of dog pee and whatever else was mentioned being sucked into the heads. There's a time and place for devices like this, and seems to me like we just witnessed a case where it should NOT be used lol.
Main problem, it is not a testable assembly
faucet, spigot, water outlet .... HOSE BIB
Mine gushing a lot of water whenever I try to wash my car
These things are horrible. It gets you all wet when the hose is shut off.
I hate those things. They go bad way too fast, and I just found out the hard way that you are supposed to heat the top lock with a torch to screw it off. Otherwise, you will strip the threads on the spigot and have to buy a new spigot. NOW, I have to pay the handyman to sweat the old spigot off with a torch or buy a torch and do it myself. Backflow preventers go bad way too fast to be calling out a plumber or handyman to torch the top lock to get the things off. I'm buying a shark spigot to just slip on the copper pipe and be done with it. Though I also have to buy a copper pipe cutter to shorten the pipe, otherwise, the shark spigot can spin on the pipe or some fool might pull it off if I don't screw it down. NO more backflow preventers for me.
I do know what you mean. I just had to cut the one at my own house off and replace it. Unfortunately you are right in saying they do not last very long, but I will say I still believe it is important to have it on there. It is for the unexpected problem that does occur from time to time. But I hate the problems you have been having. That is a pain. Thanks for the comment.
This guy has No Idea of what this device really is.
They are not helping anybody.
They fail in 5 years or less. Cost up to $30. Your example is invalid. Your hose bib valve is closed nothing would have went back in the line. Vast majority of people in zones requireing this extra hardware do not need it.
I know where you are coming from and I know how you feel. But, after over 20 years of experience in the industry and 12 years of education on backflow and irrigation, I have learned that these devices are not to protect us when everything works perfect and the way it is supposed to. They are used to protect us for when other ideas fail or for those freak type situations. There can be backflow situations and it is better to have the protection than not. Better to be safe than sorry.
@@AmericanIrrigator fair point. I still hate the dam things.
American Irrigator with your 20 years experience, I can’t believe you do don’t know or did not explain clearly the main reasons for a backflow preventer. For example: let’s say your irrigation is “ON” right now then suddenly your house loses pressure due to a broken utility water line or you find a leak in your house plumbing so you run outside to shut off your main valve. That’s when a back flow preventer is needed. If your irrigation lines are at a higher elevation then the utility line breakage or your household plumbing breakage, the water along with contaminants from your irrigation line would get (sucked back), (siphoned),(back flow) toward your house plumbing due to loss of house pressure therefore contaminating your house plumbing. I hope this info helps people understand why we need back flow preventers, vacuum breakers and anti-siphon valves for our irrigation systems.
@@SB-ww9nj though if siphoned, irrigation lines could be at lower elevation and still contaminate.
Though no problem at the household level has ever been reported.
But you just turned the valve OFF on the House 🤔so more wasted water on the Ground. more money 💰 for folks that don’t have it🤔20yr /30yrs /40yrs& even 50yrs ago people drank from the garden hose!! And we’re still alive. 🤔😂😂😂😂😂
Just turn the hose off
These suck and should all be removed. You must also love the modern gas can nozzles.
Thanks anyway.
Ditto that. You must have the strength of an MMA fighter and the dexterity of a gymnast to use those new gas cans. I take off the top and use a funnel now.
If you have a hose just keep it on position when you turn the spigot off. No need for backflower unless you doing something like this guy. You will get sprayed and wet every time you turn the spigot off. Also the yard needs more then irrigation.
Yes keep sprayer on while you are turning off the hose bib to avoid getting sprayed. Good tip. Not many people think about that. But I must say, being in the industry for 15 years and hearing countless backflow disasters, there is always a need for a backflow device. Stay Safe. Thanks for the comment.
I hate these things. You buy one, and within months you have to buy another one because it won't stop leaking.
Yes they can be a pain form time to time, but I do believe it is better to have it just in case.
If the water is shut off at bib it will never get back in the house. Waste of money and plumber problem.
Water pressure prevents back flow and if a tiny bit goes in when a attachment on hose it's gonna be the water in the hose and don't listen to this guy that thing is basically a scam and leaks or makes the most annoying noise ever invented
these are GARBAGE back-flow from what? house is under pressure more government mandated trash absolutely useless