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Old 03-19-2012, 05:30 PM   #1
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1969 27' Overlander
Stockton , California
Join Date: Mar 2012
Posts: 6
Unhappy Water leak

We have a 1969 27 ft. Overlander with the rear bath twin beds in the middle. At the campground we are now in our neighbor came over and said we have a water leak under the trailer. It is the freah water leaking. And we don't know where. We have water coming threw the faucets and it works. But the leak underneath is a puzzle. I do see a water pressure regulator and wonder if it could be bad. Does anyone know what this might be? If you could respond as soon as possible I sure would appreciate it. Thank you.

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Old 03-19-2012, 05:40 PM   #2
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2002 25' Safari
Fountain Inn , South Carolina
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Have you checked your water system drains? I have a newer trailer so I don't know how similar the water systems are. I have a line drain immediately before the pressure regulator, a drain for the hot water piping, a drain for the cold water piping, and a tank drain for the fresh water tank. The water could be leaking from the black or gray tanks somehow also.

Is the water coming out of the belly pan or from some other area?

Good luck finding your leak.

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Old 03-19-2012, 05:42 PM   #3
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1964 26' Overlander
1978 Argosy Minuet 6.0 Metre
Anna , Illinois
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Water leak

Greetings silvercabin2!

There are several possibilities, and among those possibilities are:
  • Water pressure regulator. Typically found very near where the city water enters your coach. It can appear to be a leak under your coach when there is a high pressure condition in the park where you are staying, if sand, sediment or hard water deposits have blocked the valve open. It is not uncommon to need to replace this valve on a vintage coach.
  • It is possible that you may have one or more low point drains that are partially open and this is appearing as a leak. Looking immediately above the point where the leak appears -- you may find a low point drain - - try turning the valve in the opposite direction from its current position - - that may stop the leak.
  • If you are using your air conditioner and its is an original Armstrong Bay Breeze or another of the Airstream supported brands with condesate collecting tray and drain, it may very well be the the drain pipe for the condesate from the air conditioner.
  • The last possibility that I can think of would be the expansion overflow from your fresh water tank. It isn't uncommon to have some expansion occur in your fresh water tank if it is filled to its capacity in the cool of the early morning . . . . then in the hottest part of the afternoon there is enough expansion that there is some overflow from the expansion tube -- particularly if you haven't utilized any water from the onboard supply.
Good luck with your investigation!

Kevin D. Allen
WBCCI (Lifetime Member)/VAC/Free Wheelers #6359
AIR #827
1964 Overlander International/1999 GMC K2500 Suburban (7400 VORTEC/4.11 Differentials)
1978 Argosy Minuet 6.0 Metre/1975 Cadillac Eldorado Convertible (8.2 Liter V8/2.70 Final Drive)
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Old 03-19-2012, 06:11 PM   #4
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1969 27' Overlander
Stockton , California
Join Date: Mar 2012
Posts: 6
Thank you to everyone who responded to my post. It is the regulator valve.
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