black water clean out connection leaks
2016 Passport Ultralite 2770. Maiden voyage was this past weekend. Everything worked but 2 items. 1. Found out if you leave the bathroom door open, it blocks the intake vent for the furnace and ap...
Forum Discussion
3oaks wrote:I'm not sure why they don't just use a regular in-line check valve.................That is just what my 2006 Sunline TT had. It was plumbed in the black tank flush line immediately following the flushing water inlet hose attachment.
The hose connection has an internal check valve just like the city water connection. Most ARE same as city water connection.
Then there is the 'anti-siphon vacuum breaker' (the one OP is asking about)
When water comes in thru bottom connection is pushes a plunger up and then the water goes out thru the side connection to nozzle in tank.
When water is turned off plunger drops down closing bottom connection and opening top of device to 'air' which then breaks any siphoning action from occurring.
Better (higher priced) devices also have a check valve in the side connection that closes so less chance of black tank stick coming back thru flusher system
