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Old 06-27-2016, 11:25 PM   #1
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Low Water Pressure

I'm experiencing something new since setting up 3 days ago, I have very low water pressure in the coach (2005 Holiday Rambler Navigator) even tho the shore hookup is registering about 52 lbs of pressure coming up to the coach. I get a burst of good pressure to start and then it falls off to just a trickle. Anyone have something like this happen before and if so what did you find the problem was.
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Old 06-27-2016, 11:29 PM   #2
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Have you checked filters for clogs?

Is the pressure low on all faucets?
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Old 06-27-2016, 11:31 PM   #3
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City water connection internal check valve assembly falling apart....
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Old 06-28-2016, 12:53 AM   #4
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I had exactly the same symptom. It ended up being the mixing valve on the back of the hot water heater. Mixing valve removed and so was problem. This was an Atwood 10 gallon heater, but I don't think that matters.
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Old 06-28-2016, 07:18 AM   #5
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Symptoms point to a restriction somewhere, think of it rubber band around a garden hose squeezing it. When there is no water flow, the water pressure inside the hose will eventually equalize even with the restriction, because it has time for that little water to pass thru the restriction.

When you open the faucet however, you get the burst of high water pressure, but then it slows to a trickle because of the restriction.

So the challenge is to find the first place you see low water pressure under water flowing conditions. Start with shore power, thru any filters you have, and see if condition exists on both cold and hot sides.
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Old 06-28-2016, 08:33 AM   #6
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Quote:
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I had exactly the same symptom. It ended up being the mixing valve on the back of the hot water heater. Mixing valve removed and so was problem. This was an Atwood 10 gallon heater, but I don't think that matters.

What does the mixing valve mix? Did you remove it or replace it?
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Old 06-28-2016, 08:42 AM   #7
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Thanks, water pressure is the same on all faucets, shower, toilet. I am trying to figure where the common point is to all. If I turn on the water pump I have no problem.
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Old 06-28-2016, 08:46 AM   #8
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Thanks, not sure where to find the check valve but I will pursue this, maybe with a local dealer.
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Old 06-28-2016, 08:50 AM   #9
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Look for a clogged screen filter at every connection point, starting at the campground water bib. Remove, clean & replace.


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Old 06-28-2016, 09:26 AM   #10
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City water connection internal check valve assembly falling apart....
Since you have good pressure on pump, I would check this suggestion.
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Old 06-28-2016, 11:40 AM   #11
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I just remembered that once I had a pressure regulator stop up. If you have one and if it's all brass, remove it, then reconnect your hose to see if your water pressure at your tap improves. If so, then boil the brass pressure regulator in white vinegar for five or ten minutes, then reconnect to hose. That will remove any calcium build up. That will also give you the shiniest water pressure regulator in the campground!


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Old 06-28-2016, 12:46 PM   #12
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I had exactly the same symptom. It ended up being the mixing valve on the back of the hot water heater. Mixing valve removed and so was problem. This was an Atwood 10 gallon heater, but I don't think that matters.
Hope you give 'water tempering/mixing lessons at faucet/shower' to ALL guests..especially kids.

That Atwood XT model uses a 160*F t-stat.......mixing valve combines cold/hot so that water coming out is 130*F
W/O Mixing valve HOT water is 160*F and can scald 'instantly'

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Old 06-29-2016, 10:38 AM   #13
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What does the mixing valve mix? Did you remove it or replace it?

I removed it. Didn't have a replacement at the time and have to R&R water heater.
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Old 06-29-2016, 10:39 AM   #14
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Originally Posted by Old-Biscuit View Post
Hope you give 'water tempering/mixing lessons at faucet/shower' to ALL guests..especially kids.

That Atwood XT model uses a 160*F t-stat.......mixing valve combines cold/hot so that water coming out is 130*F
W/O Mixing valve HOT water is 160*F and can scald 'instantly'


Most definitely. Rarely have guests but all are informed about our HOT water.
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