Chaparral 381RD Sewage smell

[jdshep]

Hello everyone. We have a 2018 381RD. Just got home from a week trip to a county park. Didn't have full hook ups (but I don't think that would've mattered). Noticed a sometimes strong sewage smell coming up from under the bathroom sink cabinet. Never even had the black tank 1/2 full. When we noticed the smell, I did empty the tank and put a new bottle of blue treatment in. Smell seemed to get a little better, but was still there the whole trip. Any ideas where it would be coming from, or why? Not coming from the toilet...

Thank you in advance!!

Jason

[ependydad]

Sound like your Air Admittance Valve stuck open.

It's usually very easy to replace. Just twist off the old one and twist on a new one.

[jdshep]

Originally Posted by ependydad

Sound like your Air Admittance Valve stuck open.

It's usually very easy to replace. Just twist off the old one and twist on a new one.

Thanks for the tip.. That looks easy, but are you talking about a valve on the sink drain? We are smelling sewer. The sink goes to the gray water tank. Would that be producing the same kind of smell?

Thanks again.

[SeaDog]

You may find that the smell for a gray tank is worse then from the black, check or replace the under sink valve and see if that stops the smell.

[Traveling Circus]

Originally Posted by ependydad

Sound like your Air Admittance Valve stuck open.

It's usually very easy to replace. Just twist off the old one and twist on a new one.

X2

[CedarCreekWoody]

You can test the AAV by covering it with a plastic bag and taping it tightly to seal it.

[glsimms]

Originally Posted by SeaDog

You may find that the smell for a gray tank is worse then from the black, check or replace the under sink valve and see if that stops the smell.

Had the same thought. Smell from a gray tank can be bad

[Traveling Circus]

I couldn’t not find the correct size / type AAV anywhere. I contacted the parts dept. at FR and I was able to order the part. Cost $1. Yep that’s what I thought too, but yes $1 plus shipping cost of $4. I ordered 2.