Water pump

[Gregory OConnor]

Sporlan is a name brand for the electric valve that fills the
potable water Tank. On many other campers, there are two hook up
points for water. one point fills the tank and the other is for
connecting city water to pressurize your plumbing loop. Wanderlodge
has only one hookup point.

The one hookup point is passivly connected to the loop so by hooking
in and presurizing the connection hose, you are only pressurizing
the plumbing loop. while hooked up you can fill the tank by activly
energizing the electric Sporlan valve. when the valve opens it dumps
water into the tank.

The problem with Sporlan valves are that if the valve fails and
stays open you have a opening in your plumbing loop. when the 12v
pump comes on it takes water from the potable tank and pushes it
into the loop but the open sporlan is dumping most of that water
back into the tank. I wish BB put a backflow valve on the city water
input line after the input flow passes the sporlan tankfill tee
branch. the backflow valve is all the way at the female hosebib
hookup at the bus.

The sporlan in my 94 tankfill is a diaphram valve like a lawn
automatic sprinkler valve. (some sporlans differ) On a lawn system
there is always pressure up against the valve waiting for it to get
a signal to open. the diaphram valve needs pressure on the input
side to stay closed. In the bus the pressure is often turned 'off
and on' which allow the valve to float open and slime builds on the
seals making them hard to reseat once there is pressure to close
the valve.

GregoryO'Connor
94ptRomolandCa