These Thomas pumps for the microphor toilet

[g_man1146]

Ron & Ruth,

The Thomas 12VDC compressor in my bus is set only run when there is
no shore power for the 120VAC compressor. This is done by adjusting
the ON?OFF pressure switches cut in and cut out points so they won't
trigger the small compressor when the large one has power. Another
problem that sometimes effects the Thomas compressor is a faulty
check valve somewhere in the system that allows the Thomas compressor
to loose pressure into other parts of the air system such as the
suspension etc.
When you drain water from the Thomas compressor's small tank, be sure
to have the compressor running. Otherwise water trapped in the
compressor itself and in the lines going to it will not drain. A
change in the sound it makes running is a sure way to tell there is
water in the system. After replacing a couple of check valves mine
will hold for weeks of non-use without loosing air. (I shut it off,
check the guage and check back weeks later.) It only cycles after
several Microphor flushes. BTW, the regulator inside the Microphor is
a known source of leaks. I removed mine and put another regulator for
the toilet down by the air pressure switches. Now both systems have
air regulators with guages making setting the cut in and out
pressures easier.

Rich D. '99LXi43' CT


--- In WanderlodgeForum@yahoogroups.com, "luckyron1"
wrote:
>
> We're now on our 4th one. The last two we got directly from Thomas
> instead of BB. Now #4 sounds like it's going. I drain it about once
> every two weeks. What causes them to give out?
>
> Ron & Ruth in 2000 LXI in Port Aransas
>