So our sink and bath are not draining to grey water tank. Grey water tank is empty, fresh water tank is full. Water just stays in the sink, but when grey water tank valve is opened to empty it, sink magically empties itself at the same time so I think there might be some pressure issue but how to solve it?
Pipes should be ok, we've been traveling for a month now and been careful not to put anything weird on sink. I opened pipes below sink and they are empty too.
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don't know what kind of RV you have but I'm gonna guess you have a stuck air admittance valve stuck under the sink.
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2011 Keystone Sprinter 323 BHS. Port Charlotte Fl/Hinsdale MA. Retired Master Electrician. All Motor homes are RV's. All RV's are not Motor homes.
Sink/bath drain when you open grey tank dump valve cause Air Admittance Valve is opening allowing venting of drain line
Sink/bath not draining is due to no venting going on for grey tank....air has to go OUT so liquids can flow IN......that is done by the tank vent
Go up on roof......take cap off
Push hose with nozzle down into vent line
Open grey tank dump valve and turn water to hose ON...flush vent line until clear water flows out dump line.
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Dodge 3500 w/Tractor Motor
US NAVY---USS Decatur DDG-31
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