Originally Posted by ROBERT CROSS
...Winter shut down is approaching and I still don't know the purpose of the unit. The brass fitting is a one way valve...
it goes something like this...
there is an external faucet on the classics, which can use water from the tank or shore connection.
to 'winterize this faucet a shutOFF handle ( below the brass section in your pic ) is turned to CLOSE,
then the outside faucet opened to drain the remaining 3 feet of water in the line.
(( i leave THAT external faucet OPEN during the winter once the shutoff valve is turned)) EXCEPT when connected to shore water
should a camper wish to USE the freshwater SHORE connector after winterizing the external faucet/fresh tank connection...
THAT brass section lets it happen, connecting the shore water source to the main internal plumbing.
ken (w7ts) posted a thread last month on this and got the 411 from the mothership here, see post #12...
typically winter camping is simplest just FILLING the tank and NOT leaving ANY outside hoses connected,
but THAT brass gizmo lets folks use a shore hose for water...
after winterizing the outside faucet
IF one does use shore water, the outside faucet needs to be OFF while connected,
but after UNhooking the shore hose, just open the outside faucet again and 3 feet of water will drain out.