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Old 11-12-2014, 02:23 AM   #1
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A Water Pressure Puzzle ........

As some of you might be aware, I have been trying to track and fix the cause of a low water pressure issue for the last couple of months.
Whether we were hooked to city water or running off the tank on the pump, water pressure was much lower than usual.
I tried everything I could think of and also the suggestions from others on here but nothing really worked and nothing was found out of the ordinary.

All filters and screens were clear, tried it without the filter and also looked at every hose for kinks. Also pulled out all screens in all faucets and cleaned them. Again, a little improvement, but nowhere near what pressure should be .

So ........... tonight I'm winterizing the coach 'cause here on the east coast it's gonna get cold this weekend.. I've got the water heater bypassed, the winterizing valve turned on, and guess what ? I'm sucking pink stuff out of a 5 gallon bucket with the winterizing hose and I've got great water pressure !!
I shut the pump off, put the cap back on the hose, and turned the pump on figuring if the hose cap was leaking the pump wouldn't hold pressure but would be sucking air. Pump was fine, clicked a few times to build pressure and shut down.

I'm at a loss ........ any of you learned RV'ers have a suggestion as to what I've missed ? I'm thinking I'll replace the cap washer on the end of the hose if I can get one but I'm not really thinking that's the issue.

All ideas and suggestions are welcome !!
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Old 11-12-2014, 02:34 AM   #2
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Bypass the winterizing valve, is all I can think of
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Old 11-12-2014, 02:50 AM   #3
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Oh man, wish I was there and we could play! I'm just not getting it.
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Old 11-12-2014, 02:53 AM   #4
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Quote:
Originally Posted by piper guy View Post
As some of you might be aware, I have been trying to track and fix the cause of a low water pressure issue for the last couple of months.
Whether we were hooked to city water or running off the tank on the pump, water pressure was much lower than usual.
I tried everything I could think of and also the suggestions from others on here but nothing really worked and nothing was found out of the ordinary.

All filters and screens were clear, tried it without the filter and also looked at every hose for kinks. Also pulled out all screens in all faucets and cleaned them. Again, a little improvement, but nowhere near what pressure should be .

So ........... tonight I'm winterizing the coach 'cause here on the east coast it's gonna get cold this weekend.. I've got the water heater bypassed, the winterizing valve turned on, and guess what ? I'm sucking pink stuff out of a 5 gallon bucket with the winterizing hose and I've got great water pressure !!
I shut the pump off, put the cap back on the hose, and turned the pump on figuring if the hose cap was leaking the pump wouldn't hold pressure but would be sucking air. Pump was fine, clicked a few times to build pressure and shut down.

I'm at a loss ........ any of you learned RV'ers have a suggestion as to what I've missed ? I'm thinking I'll replace the cap washer on the end of the hose if I can get one but I'm not really thinking that's the issue.

All ideas and suggestions are welcome !!


go buy a "pex"shut off valve and put it 11-12 inches from the end....problem solved. This is the same thing that happened to me.
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Old 11-12-2014, 02:57 AM   #5
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Dave ~ should it be Pex or a barbed fitting ?? The winterizing line is a flexible hose, or at least looks to be. It's a braided hose.
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Old 11-12-2014, 03:13 AM   #6
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mine is a braided hose that goes into a pex. This sound exactly what mine was doing. I even replaced my water pump with no improvements.
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Old 11-12-2014, 12:48 PM   #7
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Vaughn......I am not understanding how you can be getting low pressure on both city water and the pump. Based on you initial description, I would suspect that the common line that both city water and the pump pumps into has a constriction, kink or a partial plug. So, now you are getting good pressure from the pump when using the winterizing line? Maybe there are two restrictions........one from the fresh water tank to the pump (but the winterizing line is free of any obstruction and works well) and another from the city water source to the main common line supplying the trailer.

Dave's idea of a valve on the winterizing line is a good idea because eventually that cap and washer seal is not going to seal well.

Guy
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Old 11-12-2014, 12:54 PM   #8
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Guy - that was/is my thought also. I've traced all the lines thinking there might be a common place where there is a pressure reducer, a y that might be restricted or something similar but haven't found anything.

Totally frustrated and I'm just enough of a plumber to maybe stop a leak .........
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Old 11-12-2014, 01:16 PM   #9
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Vaughn.......do both the hot water and cold water lines at the kitchen and bathroom faucets have low operating pressure on both city water and the pump? Except for when you used the winterizing line?

Guy
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Old 11-12-2014, 06:19 PM   #10
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Guy- yes. Both hot and cold low pressure on pump and city.
Using the winterizing line both are great pressure.
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