Pioneer (like Prowler) grey tank venting through kitchen sink trap

Sean

Member
A while back I was playing around with the plumbing in my trailer and I ended up with the tub full of water. When I pulled the plug to drain it the grey tank started venting by blowing up through the kitchen sink trap. I though maybe the tank wasn't drilled at the fitting for the vent. I ended up with the waste tank termination valves and outlet pulled apart for fixing an unrelated issue (leaks). With that out I could look up in the grey tank and see the two pipes coming into the tank correctly. I called and got the drawing from Jamie and saw why this happened. The tub and bath sink are on the same line as the vent. If the tub is draining with a solid column of water it locks the vent out of the system and the only place to vent is throught the sink. I guess they figured no one would want to take a bath.
 

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cookie

Administrator
Staff member
By looking at the diagram I can see what you mean.
Seems odd that they did not vent the gray tank.

Peace
Dave
 
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