Originally Posted by L911
Where can I get a plumbing diagram for my 1971 Ambassador? I thought i had all the leaks stopped, but i must have some mystery pipes under the bellypan or in between the floor somewhere.
A service manual for your trailer will show the intended factory installation. If someone has done something custom in the 39 years of your trailer's existence, then the manual won't help you. I have the manual for 1974 and it covers the Ambassador chassis. I'd be happy to photo the page and post it here if you'll tell me if you have the center or rear bathroom.
It would be helpful if you could tell us where the water is coming from on the trailer. Rear street side? Under the galley? Front curb side? Is it gushing? Is it dripping? On city water or only when on the pump from the fresh tank? Do you see the leak inside the trailer (wet carpet or subfloor) or outside?
Something that I was reminded of when reviewing my service manual is that there is a overpressure valve. This kinda looks like a 90 degree fitting with a knuckle on it. It is near the factory regulator and city inlet. If the valve itself or the regulator fails, it would dump water out of the bottom of the trailer. This is where the location of your water leak would be helpful to know.