2012 keystone sprinter 311BHS, sink has backed up, tried to snake it, tried hot water. its been going on for a couple weeks. we can use the sink for a while and then the water shows up in the sink. I put some hot water down the drain to make the pipes hot so i could feel where it stops but its under the belly cover so i couldnt feel the hot pipes. as i was under the trailer i could see a small drip coming out of the hole where the drain pipe exits the belly cover.
all that said, wth is going on? should i snake it in reverse? use drano?
all that said, wth is going on? should i snake it in reverse? use drano?