Underwater Ram Pump
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- เผยแพร่เมื่อ 22 ก.ย. 2019
- This video shows that the ram pump can be used underwater. I wanted to find out how practical it was to run the pump underwater. Seems like the pump works well and is a little bit quieter.
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So glad you caught the siphon issue. Makes it an excellent comparison, great job!
Sir. My name is alararic tomambo i wish to buy from you one unit of your ram pump can you include the diagram spicification of all parts my phone no. Is 559 253 3378 I am from Fresno ca 93722 pls. Quote the price of your ram pump including the delivery. Thanks a lot.I need for my farm in the philippines.
He only half caught it. Yeah it took the back pressure to make it work, however, taking that hose up in the eves was still siphoning everything that was above the outlet of the hose. It did show us that there was enough lift to get water all the way up there once, but once some was coming down to the tub, there was still siphoning in the gallons per min formula. It was the same as if he would have just put the outlet of the hose in the tub without bothering with running through the rafters.
Seth thanx as always. The differential in hammer side pressure is from submersion. Total head pressure/back pressure if raised will eventually, obviously reach neutral. The volumetrics of your system will obviously have a similar range/ratio of supply dump to lifted water.
The reason for the slightly less pressure underwater is that the height up the water level in the black tub is what determines the ' drop ' of your ram pump. You lost a foot of drop when the tub was full. Depending on the situation, it still might be a good thing just for noise reduction.
Make a closed-loop system that can run continuously. You'd have to capture the water at the ram and cycle it to the delivery or to the input. If you can make one work, then you have achieved what they have been trying to do for years. I'd thought of different methods to do that, but always come back to creating a small volume pump that is powered off the ram pump. I'd like to see someone pull this off. It would revolutionize ram pumps.
I did the math on it, and seems you could almost double your run time, but eventually it will run dry.
If you lift the WHOLE operation off the ground you create another head of pressure between the bath tub and the ground. Perhaps you could use second head to run another ram pump or pelton wheel etc.
i think you were still siphoning
@haz8821 i agree with. Ther must be some siphoning happening, otherwise the lower head pressure should result in less volume
I'm impressed. You teach I learn. Thank you !!!
Thank you for watching! I have tons of other ram pump videos too!
The delivery pipe was kinked just near to the pressure gauge which I think is why the delivery flow was similar despite the 25% reduced pressure. Interesting demo, thank you.
This is awesome. I was wondering the other day actually, if that would work. A basic search brought me here. Nice work, and thanks for taking the time. new sub! Cheers!
Good stuff.... keep it coming👍🏼. I do agree with the comment to raise psi gauge out of water. 💥And also put extension on the waste valve so it’s discharge is also out of water.
Try adding a snorkel on the swing valve to lessen the underwater pressure. By decreasing the the depth of pressure directly applied to the exit you will regain the loses you are seeing, perhaps. Love to see it tested.
I guess I should have binge on your channel before asking questions!
Placing the pump in an open storage tank/trough is a great way to capture the waste water for storage like for watering stock before lifting the supply to an elevated tank to provide pressure for sprinklers.
Cows wouldnt let that thing last a day.
@@davidvickers8425 certainly not in this configuration but be a little creative.
@@AudaxK9Academy i would pipe the waste outlet to the tank on the other side of the fence it should be the same as running it under water if you dont go too high (same level as top of holding tank same pressure) or a bell/u siphon.
I thought that sound reduction would be a benefit of putting the ram pump underwater. But was disappointed that I didn't really hear a difference. Glad you explained that there was a difference in sound volume level.
Who doesnt love ram pumps. Great video. I cant wait until you test the blader tank with an adjustable pressure. :-)
I have grown rather fond of these ram pumps haha. Yes I need to get the money to buy one of those. Probably going to be next year. I have several thousand $ worth of things ahead of the tank. haha
I am glad to see it will work under water. This could help muffle the sound. Especially if there is a noise of a water fall nearby would be good. A friend was concerned about the noise attracting marauders in the aftermath of an apocalypse. I will be able to tell him about your experiment.
Underwater does seem to help some with the sound. I have a feeling it could also help with freezing in the cold months. . . . I have actually received email from many people in parts of the world who have said they lose ram pumps from theft. The sound is an issue because it draws people in to see what is going on.
@@LandtoHouse Maybe a cammo and insulated box/cover over the pump assembly to obscure, and deaden the sound? Also black pipe or hose?
@@dgbasile this summer I hope to make a pump that is stealth and hidden. An insulated box is a must.
Good stuff Seth! I've often wondered about this concept. I don't want the noise of the flapper valve to attract nosy neighbors and I wonder if the immersion would help reduce wear on the flapper. I really appreciate you doing all of this experimentation. Happy New Year to you and Family!
Happy new year to you too! The sound of the pump does seem to be dampened some under the water. The sound of the drive pipe still has a noticeable thump.
You answered my question.be blessed forever,you and your family.
Happy to help.
The pressure of the water in the pond would restrict the output of the waste valve slightly, so that could be the reason why the flow rate was a bit less on the underwater test. However, pressure gauges like the one you have are measuring the difference between the pressure on the system and atmospheric pressure. The gauge being underwater means that there is actually more than atmospheric pressure on the outside of the gauge. It seems to me that this would be the reason why the gauge seems to read less output pressure when it's underwater. Maybe try placing the pressure gauge above the water later on in the output hose?
Great video! Very informative, cheers!
I think if the waste valve is submerge the pressure will increase, it means the lift will be higher. It is the same that you are putting additional weight to the waste valve.
@@maximoincognito4881 This makes sense to me as it relies on the velocity head to force the waste valve closed and then that stored momentum forces the other check valve open. More pressure on the outlet of the waste valve should result in more required velocity to shut it and this result in more volume being forced into the other valve.
I think it runs in the wrong direction, other vid shows the "watertower" first, then the valve, depend of die impuls...
There are a few different configurations for the pump.
The the waste Valve under water is pumping at a slower rate due to the extra resistance and pressure of being under water, it has less cycles per minute. In the Video, the ""out of water"" test started at 5:07, at 5:20 it had 15 cycles, miraculously the underwater test started at 7:07, at 7:20 it had 13 cycles. Additional pressure of being under water slowed down the cycle of the waste Gate, slower cycle, less pressure due too much back pressure escaping.
The velocity of the water in the drive pipe is directly related to the difference in water level between the source and the water level above the waste valve. As this system is effectively driven by kinetic energy less head difference = less velocity = less energy = less pressure. Also even though you put the pipe up to the top of that tower the work done was actually only the difference in level between the top surface of the source (your bucket) and the level of the end of your hose. Which is why there was not much of a difference in the volume of water pumped.
Good job and thanks for sharing with us.
Love the tests! I am very interested to see how much more flow or if any you get by submerging the pump 1 or 2 feet into the creek compared to mounting it just out of the water. Do you actually gain more head pressure or does the hydrostatic pressure of the water it's submerged in cancel out any extra head pressure?
As a method of muffling the pump, this is excellent. Further the ‘spray’ is contained and therefore usable elsewhere. 👍
The weight of the water when the tub is full reduces the pressure. The waste water has a more difficult time exiting the pipe so pressure going to the elevated pipe is less. Its like you put a vertical pipe in the waste valve, the taller the vertical pipe gets, the lower the pressure. The flow rate =Area of the pipe times the velocity of the water. 8 Lbs of pressure in not sufficient to change the velocity significantly since the water stops accelerating when the valve is closed (which it is half the time). Almost 100% of the flow rate will be determined by the vertical difference between the 5 gallon bucket and the top of the waste valve. If the waste valve is underwater then the flow rate will be determined by the difference between the top of the water and the 5 gallon bucket. You don't need the long sloping pipe. Just move the 5 gallon bucket next to the waste water pond and experiment with moving the bucket up and down. Good video! cheers!
Michael Edwards 😩😩
Michael, are you saying that the pressure of the water that is pressing on the waste valve makes a difference on the flow of the water and pressure of the water in the pipe that is pushing out of the pump (not the pipe that delivers water from the source).? if so, would the height of the bucket (source) opposed to the height of the water pushing back on the waste valve have any effect on the pressure of the pump? And if so, would more one way valves up the waste pipe mitigate any ill effects caused by back pressure on the waste valve, and if so, would you think that it could be possible that the waste water could then be pumped high enough be gravity fed back into the source bucket so that there is only water lost through evaporation and or consumption...... Hypothetically speaking?
So, if someone had an NFT garden system where the source water ( rain collection barrels) were at height point 0, water flowed to a ram pump at, say, height point -10 (down hill to the end of the NFT system), could the waste water be saved by having it pump up to just above the source level (say, height point 1) so that the NFT system flows back into the source bucket at point 0. This would then have the water pumped from point -10, and the waste water pumped from point -10 back into the NFT pipes at point 1 which then flows back to the source at point 0 and starts the flow all over again and eliminating the wasting of the waste water.......Hypothetically.
Hi Jeff, The energy the system uses is from the potential energy of the source. the longer and farther it falls, the more energy it has. A lot of energy is lost with friction of the water in the pipes and the efficiency of the check valves as well as the efficiency and size of the accumulation chamber. See th-cam.com/users/mekanizmalar for a good explanation of this. You will never be able to recycle all of the waste water due to the Law of conservation of energy. A major source of energy loss in this system is the speed of the check valves closing and their size. See Bohumir Stehlik's youtube channel where he makes some very efficient valves for a ram pump from hardware store parts. Cheers!
this design makes more sense than above ground ram pumps because the pressure of the water would help keep less air in the system so probably pump move volume/pressure.
..interesting it shows the same volume.
Nice to see someone test underwater as thats what I was planning.
I have a feeling that this works well with minimal underwater depth. If it were to go too far it would start to reduce the head pressure because the hydrostatic pressure increases.
Land to House
Connecting a stand pipe to the the waste valve to above water level should fix this?
Would need a long rod to prime the pump.
Adding that pipe would actually reduce the head pressure.
Great video.. very informative I have so many questions. I'll check your other videos for answers
Awesome! Thank you for watching. If you do have questions that I dont answer in the videos please feel free to send an email.
My observation is that the flowrate and pressure might be a bit lower but the bright side is that it negates the banging noise. Maybe a 1" or 2" submergence of the exhaust valve outlet will work just fine without compromising the overall efficiency.
Nice experiment, thanks for sharing.
It makes sense to me that the submerged pump would produce lower pressure since the valve will close slower causing a slight loss in peak ram pressure.
I believe the reason the volume delivered by both situations is similar is because the average pressure generated while the output valve is open is limited by the work being done and both tests did the same work.
In this case it's essentially the difference in height between the pump and the open end of the hose that's being benchmarked. You would see a much greater difference if the output hose were long enough to present a significant resistance or if the height difference was great enough to hold the pump near its maximum output.
P S. Apologies for the necro
This wiuld have worked well where I was feeding a fish pond and wanted to irrigate the hillside above the pond.
These videos are amazing! This is wizardry!!
Thanks for sharing this.
Thanks for your great explanations
Thanks for your great videos. I'm just wondering if the pressure tank has to be long and tubular. Maybe you could test with a more low-profile, but wider container. Same, or even mode air volume, but more compact. Also, is there an option of purchasing a few spares, e.g. valves, with your kit? While one can build their own unit, I like the way yours is standardized. Thanks.
Pretty good.I enjoyed watching.
Thank you!
Submerge the Ram Pump a little bit is good, as I think the real benefit is the sound that is annoying for other people in the surrounding. Thank you for this exercise, I learned a lot from this. I subscribed to your channel, and will be seeing your other videos as well. Thank you, God bless you, and More power to you. 🙂
Great video. I have a comment and a question. First; I believe you are getting less water from the submerged pump because the head distance has been reduced by the depth of your pool. Question; I am curious to know if the submerged pump is sending a higher percentage of water through the outlet, due to the restriction on the waste valve. Did you happen to check this?
Great idea. I was concerned about noise from the pump bothering my neighbor / as the brook is by their house. Perhaps would be less in natural setting.
Salute your efforts.
Best wishes.
Thank you.
Many thanks for sharing your knowledge, very much appreciated, God bless
Thank you for watching! I have really enjoyed making these ram pump videos!
@@LandtoHouse n
@@LandtoHouse no
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@@LandtoHouse cancel
Add a pressure gauge to your pressure tank so that you can monitor the operating pressure of the underwater ram pump, I suspect it will be the same. Rig it like you did on the one next to the flume with a T under the pressure tank.
My humble request for you, is to do similar content, but with an added conservancy of water. Think as if you are in a desert where captured harvest water is precious. Recycling water and multitasking it along its path. Also a stand pipe decreases the loss of hammer energy from the supply line.
We’re seeking land along a river for our prototype off-grid Christian Retreat & Events center. With enough river frontage and drop, it looks like this concept would work for us. This is great information. Thank you!
Fun Fun and Fun, I am retired and have some freedom of schedule. Where are you looking to locate your ministry. I have had a vision for something like that for 30 years. God Bless and I hope it is the Lord's will for you guys! I'm in central Virginia.
@@clarencecarter960 we're in Central Arkansas near Searcy. We need to get creative due to the way real-estate prices have increased, especially since 2020. It would be nice to connect with you sometime and share visions. Blessings-Jeff
This pump is the key to how the Pyramids were built.All ancient structures are located near rivers with headflow.Thanks Seth,hydraulic tools next please powered by a ram.pump.
I have watched that video about the pyramids. Very interesting. There is likely a way to get the ram p ump pressure to work with some tools.
SUPER AWESOME THANK YOU!!!
Seems the hose will still siphon even though put the container up higher. Any time theres a flow with a drop down through a hose like that it will have a pull.
Good Job, Appreciated
Have you considered diverting some of the flow to a outdoor shower?
You could connect it to copper pipe and use a fire pit to hear the water.
No electricity required ...nearly endless hot water
Hi love the video. Could you put a bell housing over the check valve to stop the water preasure on the check valve?
Nice experience, this is what i'm looking for, Thanks sir
The difference in air pressure compared to water pressure shows the difference in the pressure readings.
The water submersion also cushioned the system so the noise was reduced.
Great job man!
Thank you. This one worked out well.
That was good bro.... Well done
Thank you. It turned out well.
Good job my friend
Good experiment
Good luck
Great information ! really interesting .
Nice explanations
If you submerge the pump under one feet of water, then you also reduce the head pressure by one feet. That must lead to a reduced pressure and flow rate. The flow rate might not be reduced so much because the efficiency of the pump was increased due to a longer cycle time. A comment by Steel Arms said that you have 15 cycles in 13 seconds with the non-submerged pump, but only 13 cycles in the same 13 seconds with the submerged pump.So you are closer to the optimal one-cycle-per-second ratio with the submerged pump.
Hii i am from india , i work on ra. Pump project as you say it reduce pressure by one feet and also reduced flow rate . But my question is it reduce incoming flow rate ( water coming from source to pump ) or only reduce lifting flow rate ?
I've made two ram pumps with a well expansion bladder tank. They worked extremely well. I think they are too big and bulky for what you're trying to accomplish. I have a suggestion I've not tried it yet but I see they make smaller expansion tanks. I thought you might want to give it a try. Keep up with the Good Vibes.
I just spoke with a local plumber friend this past week. He is is going to see if he can locate a used bladder tank that still works. That way I can make some test videos this next year using an expansion tank.
Sir, can I place ram pump inside aquaponic fish water tank?? Can it be helpful to save electricity and maintain water flow. Plz advise!!!
Another advantage I can see; having the supply and pump underwater in freezing weather where the ice level above the pump might cause a problem.
Yes good point! As long as the pond has moving water it should work to prevent freezing!
Saw this vid only now, but before the advantage at the end came up, that was my idea to.
We have freezing over of ponds now and again, but I have to go back over 20years that you could drive a car on a pond/lake. About 10 years ago we had our last +10cm of ice. Putting is 1m down would have given you year round supply in this kind of weather. Problem is that 0,5m of pressure is hard to create over here :-p
Great Job...Keep it coming
Thank you. I'm happy to know that you enjoyed the video.
awesome. genius.
thanks bro ... very nise job .. good work ... and i love you jobs ..
Thank yo for watching! This was a fun test and it showed some nice results.
makes sense the density of water being much greater than air when level is raised and when you fill tank you effectively reduce the elevation head and thus pressure, what would be interesting to know is (and perhaps you have done this elsewhere) what is the minimum elevation head you need to make your pump function and what configurations make that more efficient, for instance if you used a plastic check valve instead of metal I suspect you sacrifice lifespan, but takes less energy to open and close hence more efficient operation but doesn't last as long.
I would suspect the pressure difference to be related to the "obstruction" of the water o top of the flapper check valve. Or the weigt of that water working against the out flow.
Good idea Paul. I was thinking in that experiment also. A question. Instead of wasting that water that came from the valve, can you connecto a hose a put it back to the basket? Just a idea.
One reason to use this set up would be to contain the unused water and gravity pipe it to a lower elevation. I am curious how raising the height of container the pump is in would effect the volume and rise on the pressures end.
I remember reading in an article a long time ago about WATER HAMMER pumps that mentioned that a larger flow to a higher location a distance away could be obtained by using a vertical loop with the down pipe acting as a siphon working against the drag of water flowing in the pipe uphill to the final use spot. Many people associate the French Montgolfer brothers with hot air balloon fame. They also are reputed to be the inventors of the ram pump using cannon balls and an up sloped pipe as the waste valve. The flowing water would start to flow and push the cannon ball up slope to a smaller outlet, then the water inertia would lift another cannon ball vertically in a larger diameter capped pipe and tee.
I think in the first pressure test, the open end of the pipe was at the top of the wooden structure. With the second pressure test it was lower, ending in the bucket. That is why the pressure is lower.
I still think there is siphoning action that skewed the true flow capacity for both a dry and submerged pump. The siphon action is created as the water drains down the tube that's wrapped around the rafter. That falling action will cause siphoning (pulling) of water up the tube and down into the container below. I think the outflow tube from the pump should go directly from the pump up to the catch container, without being coiled over the rafter above. I think you have to do it again!!! :-)
hi, you can increase efficiency in this setup at 2 points. first forget the plastic feedpipe, replace it with rigid material like ordinary steel. 2nd remove that right angle elbow from the feed. need to achieve least internal resistance in order to speed up flow when water runs, that way water collects more kinetic energy (ready to release). then upon valve closing (the water hammer occurs) a flexible feedpipe will absorb part of the hit, reducing the waterhammer effect. so a dead strait feed pipe (preferably seamless steel) will make you the most happy ram pump owner.
i would reduce noise by soundproofing shells (there are some ready made wrap around shells against noise on sewage drains) or can try to bury underground the feedpipe (not sure how much soil dampen noise). especially you change it to steel it will carry a terrible ping on water hammer.
rubberizing the valve seat may reduce the valve noise.
when you place all stuff underwater it has to work against static pressure (due to the depth of release orifice) and some kind of plus resistance because the water has to run out into dense water not into less dense air (through the valve). as the missing 10psi has shown it precisely.
if you have a live spring on your property for less noisy operation also my consider a spiral pump.
lurkertech.com/water/pump/tailer/
regards, lev
Yes you are right. The rigidity of the drive pipe makes a big difference. Check out this video test that I ran to see the difference of poly pipe vs pvc. th-cam.com/video/heLUeTGWz94/w-d-xo.html
This summer I am going to be installing 90s 45s and 22 degree angles to see how it effects the pressure wave and output of the ram pump. Should show that the straight pipe is far better than having angles.
Thanks for watching.
Thanks a lot ❤️
@Land to House: The pressure may have been different because you didn't close the valve on the pressure gauge the 2nd time.
Your plastic tub also is a resonator and even if the pump was isolated the tub is like a drum head. If the tub were in the ground, or the pump in a pond/cistern it would be even more muffled. I am interested in the idea of collecting the water from the initial check valve in some sort of cistern from which one could draw for other uses - gardens, fields etc. good video and helpful info! Your Buddy at wranglestar sent me to you!
That's a good point. The plastic pond is no good for the sound. Underwater in a creek or in this pond underground would be better. ... the waste water can be used to fill another tank as long as it's down hill from the pump. Thanks for watching!
This would be a great way to circulate hot water in an under the floor radiant heat system. At least iy would be nice as long as it worked. Orher means could be what I use, a RV water pump running on s solar psnel charged 12v battery.
I built one to help divert my insane amount of sniw pack and rain run off on the mountain here. It does help.
Good work !
Wulfy
I am not sure that the ram pump is going to work well in a floor radiant heat system. It would be way too lossy. As for moving snow and rain run off Yes its great. Thank you for watching.
When I start working on my wetland pond and bog filter, I want to try to use a ram pump in the pond, flowing from the bog filter overflow, to the ram pump, and back into the bottom of the bog filter creating a small waterfall feature, and filtering the water. I'm wondering if the ram pump is deeper, say 4 feet underwater, how much more that might effect the flow.
Great Test that tells me it would also be possible to run a Ram Pump from a Watertank Underground. How would the Rampump act if the Inlet and outlet Valves would be farther away from the presurehead and Check valve can you make a test on that? That would be great.
You are awesome! Thanks for taking your time on doing this.
Happy to help. This summer I am looking to do more underwater tests.
Hi just started looking into this sort of pump 👍on your videos sorry if someone as already asked did it effect the amount of water used from the head
Under ideal conditions of the water supply you could bury the system and put the pump under water to keep the system from freezing in the winter and run the system year round to water live stock and etc.
Yep.. works here.. Just need to bury 800 feet of delivery line now. :)
That is really good feedback! I have a number of people up in Canada that have very cold weather and could use this info.
I like the idea! Well worth giving a test.
@@LandtoHouse i have done lots of testing here.. other videos as well regarding cold weather: th-cam.com/video/uRxuTOWz1JQ/w-d-xo.html
The water in Test Pool exerts it’s own Pressure, so the Check Valve, doesn’t Create as much Pressure
using the Pool water pressure - to Keep the Output the Same.
I Wonder, what the Results would be when the Pool water Pressure exceeds the Downflow water pressure. Will the Check Valve still open and close ??
So in low head situations like mine where the drive pipe terminates at a pond, sounds like we could effectively get more head by sinking the ram pump and waste water valve outlet in the pond? I have thought about at least sinking the pump up to the waste water outlet - that should be OK since a sealed pump - this video might indicate that we might could go deeper.
Some versions of waste water valves have weights on the valve - wonder if water above the valve would have similar effect.
Great video - very informative!
You mentioned you used this design in a cascading pond system, but that it wouldn't work in a lake. Why is this?
If I have my inlet pipe positioned at the water's surface, I would have a ~6' drop from the inlet to my ramp pump at the bottom. The only issue I see is the additional hydrostatic pressure that would have to be overcome in opening the waste valve.
The head pressure gain as you go down into the water is negated by the hydrostatic pressure in the same space. You could see this issue if you place a straw into a glass of water. It does not have flow going through it. It would be so awesome if the ram pump would work in a pond though.
@@LandtoHouse makes sense. I watched your video "Ram Pump for a Well and Aquaponics - Nope" which elaborated on the issue and ended up making it clear.
The ' drop ' you are counting on is the vertical distance from the water source to the height of the water on TOP of the exit valve (not the exit valve itself). for every inch of water on top of the exit valve, you have to subtract that. So in the case of the intake tube being in the same source of water as the ramp pump, the verticle height difference is 0. There is no advantage to having the pump submerged except for sound reduction.
The pressure output was different because it requires more energy to release the water from the ram pump ram valve into the pond when you have it full of water. It means you get less RAM, because more of the energy from the source has to be used up in getting the water thru the first ram valve. It means you have energy from the source, to capture in the pump, and why the pressure was lower in the filled pond test, some of that energy was used to get it to flow against the head in the filled pond. Yes we know the head in the pond is lower in elevation, but that is the only it works at all, but you still lose pressure because you still have a head working against the ram valve now.
You have that pump under water, and that creates a head pressure on the ram valve forcing it to be required to have a higher head pressure at your source, in order to wind up with the same pressure output as the empty pond test. Water still has weight regardless what elevation it is at, and water flows more freely into air than it will into a pressure head of water.
You can think of it this way too, the elevation of the top of the water level in the filled pond is now your exit elevation on your underwater ram. So in other words, when you put 3 ft height of water in the pond, it essentially means you moved your ram up 3 ft! And when you move your ram up 3 ft, you lose pressure. So, you in essence lose 3 ft height for the input, but don't even get to benefit from having your output 3 ft higher.
this is a game changer !! thank you ! the pump could be inside its own reservoir, and waste dumping to replenish itself. as long as the drive pipe is above the pump ?
No
Sadly this does not work. When you sink the pump you have the weight of the water on top of the waste valve that counteracts the head pressure gain. This means there is no flow of water.
@@LandtoHouse what about 1) tilt the pump set up to a less upright position to minimise the above water weight at a deeper water level or (2) craft a certain "roof" above the waste valve to absorb some of the weight form the above water from sitting directly on the pump? If this works am buying a pump today!
@@motoernest7890 And how will you discharge the waste water from the protected space? That head of water above will back-flood your protected space right away.
Very nice...
As I understand 24 PSI is due to water pressure above the outlet and changed valve weight under water. If you use a spring outlet instead of gravity weight valve which is also become lighter under water due to its volume amount water is replaced makes lighter which can be tuned by spring valve causing PSI improvement.
I think you still had a siphon effect. It probably doesn't matter form a comparison perspective because they were both the same, but the water would have to be free falling from the top of the shed (not in the hose) to get rid of it, no? As the 'pond' filled up on the second test there would be more outside pressure affecting the pump so would probably change its efficiency a little. I think you also need to lift the pressure meter out of the water so the pressure is the same on both tests (there would be more ambient pressure underwater).
Hi
Can the pump be put underweater in a weater tank rasvoir under the house suplied with weater betwen now and then or not
Thankes
Was wandering if u put pipe from bottom of pond with a float valve that opens up when the pond gets full and have that feed into the line on the dry side would that creat suction on that side to pull more water threw or would that just blow back into the pond
thanks& regards brother
At the end of your supply line, can u shut it off and on and it will still flow, or do u need a constant flow to keep the pump working?
Have you tried adding a spill pipe for extending the waste valve above the "pond" water level, to reduce the head volume of back - pressure from affecting the system ( internal PSI ?)
So it turns out that adding a pipe to the waste valve reduces the head pressure. The underwater pump has no real change.
just came across your video on ram pump underwater...looks like it works and the delivery almost similar... my question.. is there any effect if the depth of the whole pump unit varies underwater.. good experiment done.. tqvm
I love Ram because they are cool🎉🎉🎉
Could you possibly make the unit quieter by using a soft rubber seal/O-ring, or a completely different style of valve ??? Noticed kink in outlet pipe near the pressure gauge. This would probably reduce the output flow and pressure. When submerged, you have reduced the supply head height by approx 1 foot or more, therefore the input and output pressure will be reduced by something approaching 25% - 30% . Under water, the lift height (approx 4 feet),is also reduced by the same amount (approx 1 foot), thereby helping to explain the reduction in pressure . This would not be so obvious if a much higher lift height was used. I have wondered about these types of pumps since I first saw one in Tasmania as a child in a farmer's paddock in 1968, feeding up approx 15 metres to a tank on a tower with no power being supplied. Thank you very much for your videos; Very impressive.
Power is determined by the drive head, which is the height difference between the surface of the water in the header tank and the surface of the water where it discharges. It normally discharges at the top of the clack valve (drive valve). However when there is water in the tub you have to measure from the water level in the header tank to the water level in the black tub. It looks to me to be about 12" above the drive valve. This has effectively reduced your drive head by 12". If the tub had deeper sides and the water could continue to build up the pump would stop when the water approached the same level as the header tank.
I believe the reason that pressure under the water is less than the one that open to the air is that the valve for the water outlet (waste one) has friction (suction/vacuum effect) by the outside water when it is open/closed.; this reduces velocity for the valve to close or open which reduces the hammer affect that leads to reduce the pressure; whereas the systems open to the air one, the valve can close or open faster than underwater one does; this produces stronger hammer affect, leads to produce stronger pressure (not much but can be significant different in water volume in over long period of time).
The reason why the flow rate is almost the same is that there is a gravitational force acting on the flowing water that is coming from the outlet of the hose which is hanged at the cottage structure. If the hose wasn't bent back downward, i guess you can clearly see it will have different flow rate.
I am super curious if you can daisy chain these together and go farther up hill then if you had used just one. Could you test two ram pumps one at the top of the hill directly from the hose and can you test directly from a gravity feed tank that gets feed by a ram pump at the bottom of the hill thanks.
Question: can you put a tube in a pond(like half way) and then the pump in the bottom of the pond and the setup works? maybe like that you can keep the water pressure, i don't know just trying here....
(sorry for my english)
I'm kind of a dummy but I could tell the limo would work almost immediately. The closed delivery makes it work regardless of water submersion.