Ram Pump Absolute Minimum Head Pressure

What is the minimum input head pressure that the ram pump can work on? I test out the 1/2" ram pump to see if it will work on as little as 20 inches of drop. I highly recommend that you use at least 3 feet of head pressure to get the best results from your ram pump.

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[georgecrabtree]

I have always appreciated simple machines that are efficient and that accomplish a valuable task and Ram Pumps do it all. Thanks for pushing the limits.

[richardpayne]

Very interesting but.... I'm wondering about the volume of water and force behind the pump large creek, several gallon flow with very little drop

[johngodwin]

Great explanation of tilting the check valve. Thanks. Good video

[selkirkwildlife]

EUREKA, this tip to turn the check valve finally got mine cycling with little head. Now I can work on improving the weir to raise the water level and eventually get the check valve back vertical. Thank you!

[markae]

I love the test. I have a situation with very low head pressure so this was great to see work.

[gililazar]

What is the amount of water that a 100 mm rum pump uses in one go, knowing that only 10% of the amount of water used rises? Or how do we determine the volume of water needed to be consumed at a stroke ?, depending on the size of the main piston ?, or the size of the pump body ?. Both times together? ?. And after that we will look for efficient water sources. Thank you. You are the only one on Youtube, with simple, intelligible, relevant, necessary explanations. Thanks again.

[DeeMoback]

It is important to remember that even though your ram pump may not be required to pump UPHILL it can transport water from a creek or other watersource quite a sure beats carrying buckets of water to the house even if it's not very much also a ram can pump to a barrel in some situations and then a syphon action is used to cover additional distance such as over a hill and down to a some old people used this combination to cover a quarter mile or they thought "outside the box" LOL

[figureitoutday]

Thanks for continuing to test and record Seth! This is possibly the most helpful troubleshooting video yet for my situation. When I got started with your ram pump I didn’t understand the math and science of this - and did not know about fiddling with the check valve when drop/lift was lacking. I managed to figure it out after many frustrating hours, and I’ve ordered a brass check valve to see if that helps in the future. Now I’m searching for a good no pressure drip tape system. Anyone have suggestions??

[JoeMalovich]

Very interesting, this is something I was curious about. It's given me an idea for a new type of gravity pump.

[Paulie]

This is a good one, thanks for posting

[jllaine]

Excellent job, definitely worth the effort to test the limits of the pump. Have you tested the maximum head pressure for the point where the waste valve won't be able to cycle?

[patrickhoffmann]

Great experiment, and very useful! Measuring the head pressure with your outflow test is also very meaningful. You probably could reduce your waiting time by using a shorter Delivery Hose ;-) or by measuring just the pressure at the outlet of your pump. That is probably not very accurate (1 psi is equivalent to 2.3 feet of Delivery Height / and your pressure gauge has only one scale division for 4 psi, if I remember right), but much faster. Perhaps there are more sensitive pressure gauges? You also can test your pressure gauge (and how accurate it is) by connecting it to a hose full of water and lift the other open end of the hose to certain heights.

[OfficialMrGreenGrass]

I have a stream in my back yard with a high flow rate but it is flat. How to I create pressure?

[JoeMalovich]

Coiling the hose up on the hillside like that will create air-locks nerfing your delivery height.

[MultiKlompen]

Low head pressure, thats interesting for me!

[DeeMoback]

Exactly and btw, just restrict your outflow valve and your exhaust valve will otherwise you have to wait for your uphill water hose to fill

[hornetscales]

Here's a time-intensive experiment: measure flow rates of delivery rate vs. waste vs. head pressure vs. delivery height and make a graph detailing what to expect under certain conditions. I'm sure someone has done this already, and I plan to tinker a bit myself and record results, but it would still be an interesting experiment. (I'll share data when I get to this)

[mclarksws]

Have you ever tried using the venturie effect to step up the pressure from a flowing stream that is relatively level? I know it would speed up the water flow I just don't know if it would be enough.

[PlanetCypher_]

So you could have a staged or stepped system to get water up to 6' essential having an intermediate water storage and two pumps? I guess the intermediate storage tank you need to be quite big and not fill very fast, but you would be at least be able to lift the water higher?

[michealklonowski]

what if you have a 2inch pipe and reduce it going to the pump at the pump would the pump work more efficiently in this situation. 🤔