These recommendations are extremely important and often ignored even by plumbers who should know better. Having just completed a water system for a well and filtration, we have had four leaks at transitions from PVC to metal. THe reason is because this sound advice was not followed. All such transitions will now be redone.
plumbers and diy are not ready for this advice. They must learn to install unions around valves and assemblies then hope to graduate someday to stuff like this. lol.
With the ideal connection the nipple is longer than the male threaded x socket connector so the moves the stress point farther away from the metal transition. Good tip on the hose clamp on the pvc side of the pvc to metal connection.
Great video! I wish everyone doing this kind of work would follow these instructions…I’ve found every one of these mistakes on my property from previous work😅
Great way to meet code, buy using a male thread! Under the uniform plumbing code, you can't joint plastic to metal because of the difference of materials will expand and contract at different rates, causing a leak in the long run. They do sell proper PVC to copper threaded adopters or even shark bites with a PVC to tube fitting. UPC 605.12.3 Threaded joints "...female PVC threaded fittings shall be used with plastic threads only." doing this will also cause the pressure rating to be reduced to 50% per UPC 605.12.3
The worst connections I’ve ever had to deal with are metal compression fittings onto plastic pipe. Every time I find them, I end up having to cut the sleeve and the piping where the sleeve was, then glue an NPT threaded plastic adapter. Lately if replacing an interior fitting I’ll use shark-bite fittings. They never leak and if the piping is cleaned properly, they’re a quick install that’ll last for a couple of decades. It’s good to see that plumbing has caught up with industrial pipefitting.
My own preference would be to avoid, if at all possible, any metal to plastic transition which cannot be inspected. Personally, I avoid them everywhere I possibly can. Primarily, this is because metal and plastic have much different thermal properties and repeated changes in ambient temperature, over time, can weaken the joint and eventually cause it to fail.
Your recommendation at 1:39 regarding the adapter made from a coupling and cut nipple is a great idea, but it doesn't seem to work for the Schedule 80 nipples I can find. The nipples all have casting protrusions and the exterior of the nipple is not true... they have a casting seam. I wouldn't trust these to seal properly to a coupling. Edit: Happened to be in Lowes today, and found the 1 1/4" nipples seem to be cut from pipe while the 1" nipples are cast and have the seams and protrusions I mentioned above.
I got old metal plumping coming in from the city. Tgey used an old union and continued with metal piping. Can I just unscrew the union and screw in PEX A??
I have a 1 inch cold water supply line attaching to the well casing Male pvc to female metal I didnt tighten it quite enough and I have a small pinhole air leak where the threads meet the metal. I cant tighten it because everything else is glued. What can I do without taking everything apart?
I asked a 63 year old pipe fitter how to do that and he told me the exact same thing. Only he likes to use teflon tape and paste, Do you have any input on that?
Best way to connect a brass spigot for my garden hose to 3/4" schedule 40 PVC? I do have a new quarter turn spigot with the female end, but currently my 3/4" male threaded adapter seems pretty thin. A thicker one would make the inner diameter pretty small.
We are without water after the freeze and plumbers have a long waiting list. So we need your help. There is an old galv. steel connector from our well that is 2 inch ext. diameter (1 1/2 inch threaded female interior). What adapter do we need to connect to this that will reduce to a 1 inch pex pipe on the other end?
im going to put 80 schedule pipe for underground my faucet will be copper with a copper pipe is there a pvc to copper with a smooth end on top so i can solder it and not have to screw the copper line on it
I just use a length of Braided Vinyl, large enough to fit over both the PVC and the metal pipe, then I use 6 all-stainless steel hose clamps to clamp down on the pipes: 3 clamps on one pipe, and 3 clamps on the other pipe. Braided vinyl can withstand 250 psi, which is way more than the 60 - 70 psi found in a typical house.
Three wraps of blue Teflon and 2 full turns past hand tight. PVC fixture (water filter) to PVC female nipple/ adapter/ reducer to female brass adapter to water supply which will allow me to easily remove it in the future for service should that ever be needed. No leaks
I have a problem , I have a metal 16kg water meter and have to fix in height and worst part is I have to connect it with a grey pvc pipe. The threading of the metal is male and the pvc fitting is female , it leaked and I m really stuck . Can anyone recommend something please ?
what do you suggest for a 1/4" brass pressure gauge threaded into a 3/4" PVC Tee fitting with two 3/4" slip and one 3/4" thread fitting? I want a threaded connection that doesn't leak.
I have a threaded white PVC male nipple to brass ball valve. I use Teflon tape and it always seems to leak. I have over and under tightened, and I always get a leak!! Suggestions?
Hopefully you've learned by now you almost always use high quality and proper pipe dope (lubricant). The guy doing the video seemed to have some good suggestions but is obviously not a plumber, the only time you usually need teflon tape is for old, used, or malformed threads.. it's literally like a bandaid.
Does PVC thread match NPT/IP? Or it comes in different thread? I'm working with GHT trying to add a valve. Man, seems so simple but has proven not to be, lol.
Nice video but not directed to plumber dumb people like me. You should provide a detailed description of the connector that makes the transition. Now here I am trying to figure out how to purchase the adapter.
You're not alone on that confusion...and working on a 100yr old house w/ re re re modeled system only confounds it more... simple answers are sometimes anything but.
I have a question, the only niple I've found in the hardware store has letters engraved in the surface where the fitting would sit, so i guess i have to sand them out or it's better to go with the male adapter.
Two thoughts: 1. are you wrapping enough tape around the threads? 2. are you wrapping the tape in the correct direction? One way and the end of the tape lays flat against the threads as you tighten the fitting, the other way and it essentially unwraps while you tighten, creating an imperfect seal.
There is no magical number of wraps that is perfect in all instances. There is much greater variation in the actual thread pitch than the thickness of a piece of teflon tape.
Wow, this man knows his stuff. Nice insights and detailed knowledge.
Sure does.
RC Worst Info Videos are the BEST!!!
Thanks Bill!!
These recommendations are extremely important and often ignored even by plumbers who should know better. Having just completed a water system for a well and filtration, we have had four leaks at transitions from PVC to metal. THe reason is because this sound advice was not followed. All such transitions will now be redone.
plumbers and diy are not ready for this advice. They must learn to install unions around valves and assemblies then hope to graduate someday to stuff like this. lol.
Such good information here! I've been doing plumbing projects for years and can say that I've run into all of the issues he describes here.
Thanks for sharing!
best well videos on the web. hands down.
Thanks!
Your right on the fist two fittings . I been transitioning into this type of pipe and yes I been discovering this things .
With the ideal connection the nipple is longer than the male threaded x socket connector so the moves the stress point farther away from the metal transition. Good tip on the hose clamp on the pvc side of the pvc to metal connection.
Great info for us DIY guys, thanks!
Great video! I wish everyone doing this kind of work would follow these instructions…I’ve found every one of these mistakes on my property from previous work😅
Excellent explanation. Thanks! Now I can plan my work with the knowledge that what I'm doing is correct. Well, at least one part will be correct...
I've done these in the past and wrapped the entire joint with liquid steel :)
Great way to meet code, buy using a male thread!
Under the uniform plumbing code, you can't joint plastic to metal because of the difference of materials will expand and contract at different rates, causing a leak in the long run. They do sell proper PVC to copper threaded adopters or even shark bites with a PVC to tube fitting.
UPC 605.12.3 Threaded joints "...female PVC threaded fittings shall be used with plastic threads only." doing this will also cause the pressure rating to be reduced to 50% per UPC 605.12.3
Didn't know that... Thanks for the info!
The worst connections I’ve ever had to deal with are metal compression fittings onto plastic pipe. Every time I find them, I end up having to cut the sleeve and the piping where the sleeve was, then glue an NPT threaded plastic adapter.
Lately if replacing an interior fitting I’ll use shark-bite fittings. They never leak and if the piping is cleaned properly, they’re a quick install that’ll last for a couple of decades. It’s good to see that plumbing has caught up with industrial pipefitting.
Thank you , your information is very through and useful.
Interesting, I have seen each of the failures mentioned here. Totally makes sense
This helped me replace a leaking 1" PVC adapter that had sprung pinhole leaks at the seam.
My own preference would be to avoid, if at all possible, any metal to plastic transition which cannot be inspected. Personally, I avoid them everywhere I possibly can. Primarily, this is because metal and plastic have much different thermal properties and repeated changes in ambient temperature, over time, can weaken the joint and eventually cause it to fail.
Great tips!
We like to use the Schedule 80 nipple for connecting our backflow preventers to the irrigation system.
Your recommendation at 1:39 regarding the adapter made from a coupling and cut nipple is a great idea, but it doesn't seem to work for the Schedule 80 nipples I can find. The nipples all have casting protrusions and the exterior of the nipple is not true... they have a casting seam. I wouldn't trust these to seal properly to a coupling.
Edit: Happened to be in Lowes today, and found the 1 1/4" nipples seem to be cut from pipe while the 1" nipples are cast and have the seams and protrusions I mentioned above.
@@eloquent-nuance No - it might work, but I wouldn't trust the connection.
Which standard does this get detailed in?
I got old metal plumping coming in from the city. Tgey used an old union and continued with metal piping. Can I just unscrew the union and screw in PEX A??
Do you use teflon tape?
I have a 1 inch cold water supply line attaching to the well casing Male pvc to female metal I didnt tighten it quite enough and I have a small pinhole air leak where the threads meet the metal. I cant tighten it because everything else is glued. What can I do without taking everything apart?
With 20 years experience I 100% agree with this video. Avoid male/female adapters if at all possible.
I asked a 63 year old pipe fitter how to do that and he told me the exact same thing. Only he likes to use teflon tape and paste, Do you have any input on that?
A lot of old timers use this technique especially on hot water and steam.
(Socket Coupler x Thread Nipple, Sched 80) is that to be used if transitioning from sched-40 also?
Thanks for fitting education.
You can also use a mechanical joint like a Dresser coupling
Best way to connect a brass spigot for my garden hose to 3/4" schedule 40 PVC? I do have a new quarter turn spigot with the female end, but currently my 3/4" male threaded adapter seems pretty thin. A thicker one would make the inner diameter pretty small.
We are without water after the freeze and plumbers have a long waiting list. So we need your help. There is an old galv. steel connector from our well that is 2 inch ext. diameter (1 1/2 inch threaded female interior). What adapter do we need to connect to this that will reduce to a 1 inch pex pipe on the other end?
Excellent overview. Thanks. Does the sch80 nipple further reduce the cross sectional area of the water flowing through it over the sch40 one?
Where can I find a nonbinary adapter?
So donthe same rules /methods apply to replace an elbow if all the pipes are galvanized steel?
It you are transitioning to plastic, yes.
im going to put 80 schedule pipe for underground my faucet will be copper with a copper pipe is there a pvc to copper with a smooth end on top so i can solder it and not have to screw the copper line on it
Great ideas for my pull up bar extension :) diy gym for the back yard
Male adaptor also has a stress concentration corner with the diameter change.
I just use a length of Braided Vinyl, large enough to fit over both the PVC and the metal pipe, then I use 6 all-stainless steel hose clamps to clamp down on the pipes: 3 clamps on one pipe, and 3 clamps on the other pipe. Braided vinyl can withstand 250 psi, which is way more than the 60 - 70 psi found in a typical house.
great video. love that thumbnail too btw :D
Thanks! 😁
Tape it is! Thank you!
Three wraps of blue Teflon and 2 full turns past hand tight. PVC fixture (water filter) to PVC female nipple/ adapter/ reducer to female brass adapter to water supply which will allow me to easily remove it in the future for service should that ever be needed. No leaks
This reminds me of a hide-the-pea under the walnut shell game.
Like all the other comments, great info for DIY people. Good to follow with the taping video, too
house main water line is a fine example... was done the way you say is no good.
I have a problem , I have a metal 16kg water meter and have to fix in height and worst part is I have to connect it with a grey pvc pipe. The threading of the metal is male and the pvc fitting is female , it leaked and I m really stuck . Can anyone recommend something please ?
What is Mertal?
what do you suggest for a 1/4" brass pressure gauge threaded into a 3/4" PVC Tee fitting with two 3/4" slip and one 3/4" thread fitting? I want a threaded connection that doesn't leak.
Dave, with pressure gauges it is fine to thread them into PVC. Just be sure to use teflon/pipe dope and do not overtighten.
great presentation thanks
Glad you liked it!
Thanks! Much appreciated.
Glad it helped!
For want of a coupling my whole kitchen floor is wet. Thanks!
Is this applicable to transitioning my bathroom water supply from. Galvanized to cpvc? If yes, hot and cold both?
Yes, the general principal of threading plastic into metal still applies.
Thank you!
You're welcome!
i do both,however..it all depends fittings i have at hand for a particular job.i reinforce the pvc female at the hub,with a ss screw clamp.....done.
Great, i learn a lot of important things
Glad to hear that!
Our pipe busted over winter and i can not figure out how to get it off
I have a threaded white PVC male nipple to brass ball valve. I use Teflon tape and it always seems to leak. I have over and under tightened, and I always get a leak!! Suggestions?
Hopefully you've learned by now you almost always use high quality and proper pipe dope (lubricant). The guy doing the video seemed to have some good suggestions but is obviously not a plumber, the only time you usually need teflon tape is for old, used, or malformed threads.. it's literally like a bandaid.
Does PVC thread match NPT/IP? Or it comes in different thread? I'm working with GHT trying to add a valve. Man, seems so simple but has proven not to be, lol.
Can this be used under pressure?
Yes
Awesome videos!
Thanks for watching!
Is that the mystery box guy?
Nice video but not directed to plumber dumb people like me. You should provide a detailed description of the connector that makes the transition. Now here I am trying to figure out how to purchase the adapter.
You're not alone on that confusion...and working on a 100yr old house w/ re re re modeled system only confounds it more... simple answers are sometimes anything but.
You have to buy a schedule 80 nipple then cut it in half or cut it short. Then buy a schedule 80 slip coupling. That’s the connector that’s all it is.
I have a question, the only niple I've found in the hardware store has letters engraved in the surface where the fitting would sit, so i guess i have to sand them out or it's better to go with the male adapter.
Hi Fred, thanks for the question. Can you tell me a little more about the connection you're trying to make? What two pipes are you trying to connect?
Cual es el de tuberias metalicas y el de tuberias plasticas
El tubo metálico es de latón y el plástico tiene el color gris.
Original
But you guys have no idea what a crown adapter for a 2 inch jet assembly is.
Where is the blue dust pan??
😆
what am I missing? you are transitioning plumbing using grey electrical PVC fittings? A no go in my jurisdiction.
Those are PVC Sch. 80 fittings
"Or something along those lines"....I see what you did there.
😂😂
They do make threaded nipples for that transition.. sched 80
Everyone says to use thread tape but mine leaks. You have to use some kind of glue...
It just makes me crazy when people say "these ones"! Not proper english no matter how much you know.
@@bulletrotor7522 Wut?
Two thoughts:
1. are you wrapping enough tape around the threads?
2. are you wrapping the tape in the correct direction? One way and the end of the tape lays flat against the threads as you tighten the fitting, the other way and it essentially unwraps while you tighten, creating an imperfect seal.
@@bulletrotor7522 what are you a English teacher lighten up dude
Dont use tape at all for new installs, rookie mistake
Ur doing plastic to plastic transition not metal to metal as total explains
Well, you didn't eloborate on how to assemble the good one.
Hard to concentrate on what he is saying as his hands are moving way too fast and causing a lot of distraction.
EeerGads!!!!!
No such thing as male and female dude im so offended
😂😂
😝
He said he was discussing "transitions"
Obviously your PVC identified as metal and you had to help it transition?
@@RussMeister70if the PVC identifies as metal, do the opposite of what this dude says
none, they are all barb
No good for the real world really sucks
Are there transgender fittings….not inclusive
He said nipple
Another guy who can't tell you how many turns of teflon tape to use. I have heard as low as 1 and as high as 14. Thumbs down.
We have a video on that... th-cam.com/video/f7mjyzfB9Ec/w-d-xo.html
Dont use tape it's bad advice, rookie mistake
@@jdahighroller9389 Leaks wit out it.
There is no magical number of wraps that is perfect in all instances. There is much greater variation in the actual thread pitch than the thickness of a piece of teflon tape.
@@chuckschillingvideos So how many tines do you cut the pipe and redo it to see how, many turbs is right?