Water Pump Choices

Sam Spade is right on the money with the suggestion of adding a small pressure tank. I've done this and it works extremely well. Good constant flow especially when showering. Very easy installation too.

Shane-Come Back wrote:


Okay, good points. What brand and model do you suggest for someone that wants to be blown over in the shower(already upgrade shower head) or run multiple faucets at the same time?

Only take a shower when hooked to city water??

When running off the 12v pump, even if you have a high volume pump and a pressure tank to reduce surging, you are still limited by the diameter of the pick up tube in the fresh water tank which as I recall is only 1/2 inch diameter. ON EDIT: ( I'm no expert and don't have any idea what pressure differential there would be on the pick up tube from the tank to the inlet of the pump, but from what I could find, seems like a range of 1.8 to 2.3 GPM, so you would need a bladder tank holding maybe 20 gallons to keep up with a 7.5 GPM pump for 3 min. of combined flow thru multiple outlets. But most outlets are designed for 1 to 1.5 GPM, so a 7.5 GPM pump is overkill anyway.) Then if you solve that by having a larger pick up tube installed, you will quickly drain the fresh water tank anyway.

Also running higher pressure in the lines, either city water or from the tank, may cause additional problems. Between road vibrations and temperature variations (daily and seasonal), water fittings can begin leaking. The higher the pressure, the greater the probability. Small, hidden drips can cause big problems over time. I frequently camp at a park with pressure around 100 psi and forgot to use my pressure regulator. Fortunately I found the leak within a few days so no long term damage.

Shane-Come Back wrote:

Okay, good points. What brand and model do you suggest for someone that wants to be blown over in the shower.....

Well you probably won't like my answer.
First I think you need to dial back your expectations a bit.

Then I am no expert on demand water pumps, as evidenced by the apparent waste of money in my own change out.

But I hope someone else here has more expertise/information to offer.

Moved from Forum Technical Support

Sam Spade wrote:
What are you trying to accomplish that it won't do now ??

Flow capacity is probably more important than pressure.....and pressure that is too high can blow out fittings.

45 to 50 PSI should be plenty of pressure; the GPM capacity is more important if you need to run more than one faucet at a time.

I had an "upgraded" variable speed pump put in my C trying to reduce the noise and get a better shower. The shower works a bit better but it is still noisy. I think the only good upgrade would include a small pressure tank to smooth out the flow.

Okay, good points. What brand and model do you suggest for someone that wants to be blown over in the shower(already upgrade shower head) or run multiple faucets at the same time?

What are you trying to accomplish that it won't do now ??

Flow capacity is probably more important than pressure.....and pressure that is too high can blow out fittings.

45 to 50 PSI should be plenty of pressure; the GPM capacity is more important if you need to run more than one faucet at a time.

I had an "upgraded" variable speed pump put in my C trying to reduce the noise and get a better shower. The shower works a bit better but it is still noisy. I think the only good upgrade would include a small pressure tank to smooth out the flow.