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Old 09-16-2019, 11:56 AM   #1
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Fresh water pressure issues

I am looking for a resolution to two annoyances.

First, our water, worst at the kitchen faucet, sputters, so much that it splatters all over the counter, and back wall, and anyone nearby. It's maybe what would be expected if you're bleeding air from the lines. Its better when on full, but at point that its hitting sink so hard it splatters out anyway. Bath doesn't to it, bathroom sink does but not so bad that it's a problem.

The pump this year sometimes continues to run when the water is off. Most notable when we have have a faucet on low (mostly trying to avoid splatter). It just sits there and hums, as if the fresh tank were empty. Most of the time you can turn a faucet on and let out a higher rate of flow then shut it off and the pump will come to pressure and stop. Sometimes we just have to turn off the pump. I've bled out as much air as I can.

This is only pump driven water, the problem does not occur using city connection

I feel these issues to be related, perhaps a pressure switch or something, but wanted to hear from others.
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Old 09-16-2019, 12:11 PM   #2
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Are you using a city water pressure regulator, 45psi is about the most comfortable pressure for our use. Usually 35psi pump pressure is what comes from the factory. Sputtering does indicate air in the lines, perhaps the pump is drawing air from a loose, defective connection between pump and storage tank, or pump strainer on the intake side.
Is this hot or cold water sputtering?
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Old 09-16-2019, 12:20 PM   #3
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Both hot and cold sputter. I can check the intake screen next to the pump, perhaps it's drawing air there. When using city water with regulator it doesn't happen.
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Old 09-16-2019, 12:21 PM   #4
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yoym --


Your question is confusing, for me anyway. Is the water coming from your fresh water tank (which requires the pump to run) OR is the water coming from a city water connection (which does not require the pump to run) ?


If you can clarify your water source (tank or city connection), the Forum can provide better thoughts and guidance.
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Old 09-16-2019, 12:23 PM   #5
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Sputtering, pump not shutting off very shortly after faucet is closed, pump humm etc........that is AIR Entrainment IE: air is getting into system
Air can ONLY be drawn in via suction side of pump


Pump casing crack
Pump strainer crack, bad seal
Pump suction hose fittings, hose clamps etc
Pump 'winterizing' set up......vlave open/leaking thru, fittings etc
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Old 09-16-2019, 12:28 PM   #6
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Quote:
Originally Posted by fagnaml View Post
yoym --


Your question is confusing, for me anyway. Is the water coming from your fresh water tank (which requires the pump to run) OR is the water coming from a city water connection (which does not require the pump to run) ?


If you can clarify your water source (tank or city connection), the Forum can provide better thoughts and guidance.
Edited the post to avoid future confusion. Yes, pump only.

Quote:
Originally Posted by Old-Biscuit View Post
Sputtering, pump not shutting off very shortly after faucet is closed, pump humm etc........that is AIR Entrainment IE: air is getting into system
Air can ONLY be drawn in via suction side of pump


Pump casing crack
Pump strainer crack, bad seal
Pump suction hose fittings, hose clamps etc
Pump 'winterizing' set up......vlave open/leaking thru, fittings etc
Thanks OB, I will check it out, ill probably start with the pre-pump strainer as it's just easy to get to, and should probably be changed anyway.
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Old 09-16-2019, 11:50 PM   #7
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Quote:
Originally Posted by yowmemperor View Post
Edited the post to avoid future confusion. Yes, pump only.



Thanks OB, I will check it out, ill probably start with the pre-pump strainer as it's just easy to get to, and should probably be changed anyway.
The strainer has a removable screen that may be cleaned, make sure the housing is not cracked, replace screen housing snugly to prevent air leakage.
New ones are not expensive though.
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Old 09-17-2019, 08:41 AM   #8
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I have run into this problem twice. Not my trailer but other campers. Both times it was the suction line where you winterize. The valve is not closed all the way.
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Old 09-18-2019, 12:51 AM   #9
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Once again, I agree with Old-Biscuit. Your issue is somewhere on the suction side of your pump. Trace those lines and find the loose or partially open connection. If you have one of those three way valves, check it very closely. They can be cracked open when you think they are closed.
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Old 09-18-2019, 12:41 PM   #10
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I had a similar problem just recently, but not as severe as yours. I had replaced my old pump with the same Surflo #4008 model, but after 2 weeks, it started spitting, staying on for a few seconds after shutting the water off, running very loud, & coming on for just a second every half hour or so. The problem was the back flow preventer inside the water pump was defective & water was backing up thru the pump. The company sent me a new one & the problem went away. I also installed a Shark Bite back flow preventer right after the water pump to prevent the same problem if the pump's back flow preventer fails again.
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