Originally Posted by taxbuster
Continuing....as I work my way through this process:
I've now found the pump (at least I hope that's what it is).
Do I assume rightly that I can remove the white thumbscrew, attach a similar one and stick the end of the attached tube into the antifreeze to pump up into the system?
(This is a long journey for a decidedly non-mechanical accountant!)
I can't tell from the photo if that's the correct side or not.
You want to drain your freshwater tank and drain your water heater.
Then turn all the bypass valves on the back side of your water heater.
Some RVs have a single winterize/bypass valve and some have 2 and
some have 3. All need to be turned from their "summer" mode to
IF the hose you show in your photo goes between the pump and
your fresh water tank, then YES that is the hose you remove from
the pump. Attach a new hose to the pump and place the other end
in a gallon of RV antifreeze. My pump pulses and the hose often tries
to come out of the jug. I've found a piece of duct tape will hold
the hose in the jug very nicely.
Also you need to locate your water filter and remove the cartridge.
Some have a bypass valve on the filter but most do not.
Once you've got all the above done you can turn on your pump.
It should pump several seconds and then stop. If it doesn't stop and it
empties the first gallon of antifreeze, you must have something open
or not correctly bypassed. IF the pump stops go look at the jug of antifreeze and see how much is left.
Turn on the faucet that is farthest away from the pump. Let it run until
you get pink antifreeze out. Then do each faucet both hot and cold and
the shower and flush the toilet and don't forget the outside shower.
You'll likely use 2 gallons of antifreeze.