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DGShaffer · 09-12-2012, 03:07 PM

That check valve and the one like it under the kitchen sink is for the gray tank. The smell is still bad only not quite as bad.

jcthorne · 09-20-2012, 01:06 PM

That 'stuck' valve in the black water rinse line is a vaccume breaker. Its required by code. Its function is to ensure contents of the black tank do not get sucked back into the water line connected to a domestic water source on loss of water pressure.

You really should unstick it and reinstall.

Fl Crayfish · 09-21-2012, 05:31 AM

Quote:

Originally Posted by jcthorne

That 'stuck' valve in the black water rinse line is a vaccume breaker. Its required by code. Its function is to ensure contents of the black tank do not get sucked back into the water line connected to a domestic water source on loss of water pressure.

You really should unstick it and reinstall.

Yea But, yea BUT,, THe rinse line (back flush) isn't connected to the water lines. All it does is goes from the black water tank to the hose bib located at the sewer valves and is used to back flush the tank. How does it suck anything from any other water / drain line ? It can't. I talked to the guy at Lazy-Days (Thor )parts counter and he didn't think it would be a problem to install a 90 elbow and loose the valve ? But of corse he wasn't sure ???

DGShaffer · 09-21-2012, 05:54 AM

What the poster above was saying is that the check valve at the connection point inside the dump valve compartment is there to protect the water system that you are connecting to it for the purpose of flushing your tanks from being contaminated from sewage flowing back from your tank. That must work properly!

What you found under the sink and what I'm talking about are a suction break for the gray tank so that when you dump the gray water the suction doesn't pull the water out of the traps under the sink. That's why there are two of those, one in the bathroom and one in the kitchen.

The check valve at the connection point in the dump valve compartment and the ones in the inside plumbing are totally unrelated and serve different purposes.

In your case, the fact that water will not flow into your black tank when you connect a water source is due to that check valve being installed improperly or being defective.

jcthorne · 09-22-2012, 05:04 AM

Damon places the vaccume breaker for the rinse line under the sink in the bathroom on some coaches. Our Daybreak is that way. The vent for the sink drain is a differenent critter.