I have gnats coming up through sink in a friends RV.

[FTer&nj]

I have gnats coming up through sink in friends RV. Thought is it is coming through outside septic. He has put Clorox in the septic drain. Any other suggestions to resolve.

[EdInArk]

I've seen that and couldn't figure how they got through the P-trap. I wondered if they are entering from the top for whatever it is they like down there and what I was seeing was just them exiting the same way the entered.

[Gone_Feral]

They enter from the top. Pour some Chlorox down there and they'll disappear.

[spritz]

I have found that they come up thru the Blk Tank from the sewer . I keep the Blk tank closed and empty every few daysor keep a eye on your gages.
Tim

[sdennislee]

Have a look here http://www.irv2.com/forums/f59/stran...om-418817.html

[Jay D.]

Originally Posted by EdInArk

I've seen that and couldn't figure how they got through the P-trap. I wondered if they are entering from the top for whatever it is they like down there and what I was seeing was just them exiting the same way the entered.

THIS^^ unless they have scuba gear. the cure put a rubber drain plug in the drain.
Jay D.

[rvethereyet]

Originally Posted by spritz

I have found that they come up thru the Blk Tank from the sewer . I keep the Blk tank closed and empty every few daysor keep a eye on your gages.
Tim

yep