Black Flush Anti-siphon Valve
We’ve chased black tank odors on and off for quite a few years, for the most part they’ve been resolved BUT once in a while we get a slight odor in the fridge/pantry corner of our VL320. Recently I s...
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It is NOT a vent. It is a Check valve. While it may look like it vents, it does NOT. It is installed above the tank to prevent a siphon effect if you lost water pressure to the black flush system. Thus contaminating the fresh water supply system to the RV. They CAN leak water when broken, but they will not vent odors inside the RV. Doug
PS, the input check valve is redundancy. It is nice to have to prevent what little water is in the pipe TO the anti siphon valve, from draining back into the water compartment.
PS, the input check valve is redundancy. It is nice to have to prevent what little water is in the pipe TO the anti siphon valve, from draining back into the water compartment.
