Strange sounds from the kitchen sink

[Lurker52]

Hey All,

Help me out here. I am sitting in the RV doing some work and all of a sudden, I hear a gurgling sound from the kitchen sink. I first think a water line must of broke. I check everything and all is ok. That was weird.

We have been set up here for a few days with full hook ups. The black tank value is closed and the grey is open. I checked my vents and everything is ok. It stopped after a few minutes but there was a smell of sewer. I was perplexed.

After thinking about it I am wondering if someone up stream from me dumped their black tank and the force of the fluids pulled the air from my drain pipe. It sounds kind of strange but I can’t think of any other explanation.

Has this ever happened to anyone else? Look forward to your help solving this mystery.

Thanks as always,
Phil

[down_home]

We keep the gray tank open when dong laundry and sometimes when we are sitting in one place for while...but in Mississippi we had a lot of sewer gas invade the coach. So we closed the valve and upon removing our sewer hose found several big slugs crawling up the sewer connection. A little longer and they would have been in our sewer hose and in the gray tank.

[Lurker52]

Found out the park is having the sewers worked on. That's what it was
Thank

[RobWNY]

I keep my gray tanks open when I'm on an extended stay someplace. I always make a "P" trap or a dip if you will in my sewer hose near the actual sewer connection. That way I know it stays filled with water preventing sewer gases from getting into my RV. Many RV parks have their sewer connection pipes a few inches above ground level which makes a "P" trap automatically.

[Lwiddis]

Flushing your hose after a black tank dump is important! Grey tank water does flushing. Let your tanks fill...then dump.

[2_many_2]

Welcome back OB, glad to see you are on a roll again :B

[Old-Biscuit]

'P' trap got sucked dry.......close the grey tank dump valve until time to dump and fill trap back up by running a little water down sink drain

[Bruce_Brown]

I think you figured out what it was.

I always keep the valves closed until (A) the tanks are near full, or (B) it's time to go home. Over the years I've found it seems to work best to let the tanks fill as opposed to trickling out as you're doing.