Sink is bubbling

[Suzz]

My sink is bubbling and the water takes a bit to goes down. We cleaned most of the pipes but it didn't help much. We ran water through the vent pipe. Put dish soap in the drain. I don't know what to do. I sure hope someone can help.
Thank you
Suzz
Ps. I'm not sure if I am doing this right.

 

[mjeds]

silly question, but have you drained the grey water tanks?

 

[Suzz]

Yes

 

[Suzz]

Sorry I should also let you know that it's not a new rig it's a 2015

 

[mjeds]

sounds like a clog somewhere then.

I would google "unclog an RV drain" there are quite a few videos and How To's

I have used the Vinger and baking soda method in my home and it works well, have not had the need so far in the Trailer.

 

[team bradfield]

are you camping below freezing temps?

 

[Kevin D Pem]

I always use drain strainers! Bathrooms hair mixed with soap are the biggest problem. Kitchen? Well anything can catch up in the drain. But soap doesn't come into play very often.

I use a plunger! If buildup of gunk is present, it is usually limited to the p traps, so an easy fix.

 

[Okie]

Kitchen sink or lavatory?

 

[TheLooks]

I would suspect the vacuum breaker under the sink.