Re: [VAC] Holding tanks

[Jim Dunmyer <jdunmyer@xxxxxxxxxxx>]

Janis,
 It does sound like you have some split seams in the pipes.
 
As to why you had pressure even after shutting off the water, I'd bet on
the air pressure in the hot water tank being the culprit. If you bleed
all the air out by opening the hot water faucets one at a time, the
pressure should drop to zero very quickly after shutting off the water
supply. Of course, if you have a long hose and shut off the hydrant
feeding the trailer, the hose itself will supply residual pressure, just
due to the elasticity of the hose itself.

You probably do have a water storage tank somewhere in the trailer, but
I don't know where it'd be. If it's one of the old-style pressure tanks,
it also could supply pressure after you shut off the incoming water.

All of the water supply lines should be INSIDE the trailer, above the
floor, not below the floor and above the bellypan. The trailer is made
that way to keep the pipes from freezing during winter camping.
(assuming heat in the trailer) Dunno how your A/S is made, but I can
actually see nearly all of my water supply lines as I trace them through
the closets and cupboards, etc. To keep water leakage to a miniumum, you
might try pressurizing the system with air and listening for the leaks.
Air leaks are normally pretty easy to hear, but try to keep the pressure
below 50PSI or so.

Could those 'metal pipe thingys' be the system drain lines? My trailer
has a couple of drain valves inside the rear compartment that assist in
winterizing the system; those are normally left open after blowing down
the system and must be closed before placing it into service.

                                      <<Jim>>