Smelly leak?

Don't turn on the powered bath vent until after you flush.

Use more water per flush. Also add holding tank chemicals to help neutralize odors

Possible dead mouse?

The idea of a dead critter really bums me out. I took off the vent grate and looked as best as I could but didn't see anything.

Meanwhile, I dropped in another tablet in the toilet and told everyone to use more water. I can't really mess with anything under the camper until I get home.

Really confused by why it's so concentrated in the back floor vent.

Ok. So it now appears there is a leak somewhere in black tank line. I found a drip under the camper and a smell test confirmed its from the black tank. So. I'm afraid to ask, but what kind of job is it to replace, repair, or diagnose this problem?

A major source of "black tank smell is not the black tank but the gray tank. Water evaporates out of the J traps and allows grey tank smell to come into trailer. Go to ALL drains and run about a gallon of water down each of them.
As far as your drip it could be very very simple or major you just need to call around and find what is the charge for a look see by a RV Tech

TyroneandGladys wrote:
A major source of "black tank smell is not the black tank but the gray tank. Water evaporates out of the J traps and allows grey tank smell to come into trailer. Go to ALL drains and run about a gallon of water down each of them.
As far as your drip it could be very very simple or major you just need to call around and find what is the charge for a look see by a RV Tech

Any chance you could describe a simple problem that would lead to black tank leaking? Seems like most of those would be pretty major.

It could be a faulty air admittance valve (AAV) under the sink. It's easy to think it's a black tank odor. We had one fail less than a year old while on a trip. Bought a replacement at a Lowes. That failed in a few months. Ended up spending something like $30 on a heavy duty Oatey AAV. No more odors... I've now had to replace the AAV in the kitchen and bathroom in under a year.

A mentioned, the P-trap in the shower could be dry. Need to periodically add water if you don't use it much. In rarer cases, the vent pipe to the roof can drop into the tank and not vent odors outside. Do you have a remote cable operator for the dump valves? Could be a defective valve. If you have an enclosed underbelly, that unfortunately is not a Sunday afternoon re & re.

But theres definitely a dripping lean under the camper. Smells like the black tank. This seems to eliminate most of the easier, odor causing problems and make me think it's actual tank leaking. Don't you think?

acritzer wrote:
But theres definitely a dripping lean under the camper. Smells like the black tank. This seems to eliminate most of the easier, odor causing problems and make me think it's actual tank leaking. Don't you think?

I forgot to mention that you could dump and flush the black tank then add some food coloring & water and see what drips out. No colored water, no black tank or fitting leak.