No shower on pump?

[ics-john]

With the recent cold weather (yes, even here in Dallas) we went on
internal water. We were surprised to note that we could not shower,
we couldn't get either hot or cold water. The pump never cycled on,
yet at any sink or the toilet running water would cause the pump to
run.

After the cold went away (it's 81 here today, so nothing is frozen) I
hooked up external water and the shower worked fine. Went back to
pump only, no water in the shower, but OK everywhere else.

Any ideas on why? Or, were TS coaches made this way for some reason
(yes, I do shower, even when boondocking).

John

[Tow...@aol.com]

John,

 

You will find that there is not enough heat in the wet bay.

 

It is the cold air return for air furnace and here is what I am going to do...

 

Bore a 3" hole under vanity to that low cold area and install a cold air return duct sealed from the inside to draw floor temperature air into that direct area.

 

My TS has the furnace in that bay so it is negative pressure to begin with. 

 

I hope this helps.

 

Richard Townsend
TOWNSEND BLDG & FINANCE
GREEN ACRES Camp Ground
"LIFE STYLE NATURE RESORT"
Year-round Full Hookups
800 664-1679 Fax: 603 664-6043
43 Hall Road - Barrington, NH 03825

[Bishop at Supreme RV Service]

John,
You have a blockage within the system. That is my only explaination.
The way that the plumbing system was designed, the city water inlet is
connected into the discharge of the pump via a tee. The connection for
the city water and the discharge of the pump both have check valves to
maintain proper water flow. From that point, water is feed into the
plumbing system and distributed to the various fixtures. Generally the
city water pressure is higher then that of the pump. Therefore is is
plausible that a blockage within the system would create the scenario
you currently face. An alternative solution, not very likely but
plausible, would be that you have't returned the fresh water fill
valve in the wet bay to the off position. This would create a short
cycle loop for the pump and diminish water pressure.
I hope this is a starting point for you.
Bishop