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Old 05-14-2015, 07:55 PM   #1
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1994 35' Land Yacht Diesel
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Land Yacht fresh water leak

Where the city water comes into the coach, it passes thru what looks like a pressure regulator (Brass thing with an adjustment screw on top)
Problem is that pressure regulator leaks when using the pump for water pressure instead of the city water.
Seems that would be back pressure on the thing instead of pressure in the flow direction it was designed for.
I know there is some experience with this problem out there. Any ideas?
Since we never use city water and always run off the pump, may I just eliminate the leaky part?
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Old 05-15-2015, 10:34 AM   #2
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Why not just replace it PAUL?

Take a picture of it and it should be available at any hardware or RV outlet?


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Old 05-15-2015, 11:12 AM   #3
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Probably the standard Watts pressure regulator AS has used for many years. There is also a check valve between it and the outside city water inlet. The regulator has probably cracked somewhere, thus the leak. I think that Home Depot carries them, or something similar. If you never use the city input you certainly could remove it. Just don't eliminate the check valve, or else cap the city water input off.

The next owner might curse you for eliminating it though.
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Old 05-16-2015, 06:03 PM   #4
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Thanks guys, I guess I'll have to look again for the shut off. Then replace the Watts pressure regulator you cited. The AS Forum works again.
Thanks
Paul
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Old 05-17-2015, 01:23 PM   #5
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Watts water pressure regulator =

LF223, LF223S Lead Free* High Capacity Water Pressure Reducing Valves, Water Pressure Reducing Valves - Super Capacity, Water Safety & Flow Control - Watts

I replaced mine a number of years ago with a Watts Model 70. I think it must be discontinued. I don't see it on the Watts web site.

BTW - I reconfigured the plumbing to accommodate a water pressure gauge. I can now adjust water pressure to my liking: 45 PSI @ pressure relief valve; 50 PSI @ water pressure regulator.

Tom
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Old 05-17-2015, 04:30 PM   #6
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Why wouldn't a check valve placed between your pump and pressure regilator not solve the problem?
Fact is, unless I am mistaken, there should be one.
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Old 05-17-2015, 08:58 PM   #7
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Thanks guys, I'm taking it with me tomorrow to get a new one. Yes there is what I thought was the in line pressure regulator between the city water inlets and this, guess it's actually a check valve.
With your advice I'm taking it all to the plumbing supply less than two miles away.
Great Forum
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Old 08-15-2015, 06:28 AM   #8
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Soon after my last post I replaced both the check valve and pressure regulator and now can use city water or the pump, NO LEAKS.
Thanks Airstream Forum!
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Old 01-25-2016, 01:10 AM   #9
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My 97 LY diesel pusher just started leaking at the same point. This winter I have used the pump and fresh water tank vs city connection. After the cold in Montana it now leaks when in use. Sounds like I need to do the same and replace the check valve and pressure regulator.
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Old 01-25-2016, 08:47 AM   #10
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Mike, check Amazon for the regulator. For a while they were selling them MUCH cheaper than RV suppliers. Just be sure on the pressure value.
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Old 01-27-2016, 12:33 AM   #11
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BTW, Home Depot generally has pressure regulators with shark bit fittings on each side which can make replacement much easier. I think they are Watts too. Around $50 as I recall, but might be higher. I don't know if they have a shark bite check valve.
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