Out for second time w 2002 montana. All of a sudden kit sink wont drain. Hooked to city water, grey tank drained. Didnt put anything sjgnuficant down drain. Took trap off, no pblm there. On tank monit...
We have probably beaten this one to death, but on my 07 Outback it was between the wheels on the driver's side; under the slide and a PITA to get to. I would catch it with the loop end of an awning hook to pull/push it when the slide was out.