We finished our basement which included adding a bathroom and a sewer ejector, but there is no defeat of the smell coming from the ejector. Not a plumber, I will do my best to describe our layout. Pretty simple actually. A downstairs full bathroom and utility room. All waste runs no more than 20 feet to Little Giant sewer ejector. All work was done to code, as all plumbing was new. There is a proper slope as we sawed and hammered out all existing concrete to have plenty of depth to work with. The venting is where it got tricky. No economical way to the roof, we used those AAV's to tie into each of the drainage areas. They all tie together and join a stack coming out of the sewage pit and goes up and out of the house. I am certain there is no gases coming from the valves, but rather from the pit itself. I have done everything to seal it up, but doesn't work. The smells can be bad at times.
Any suggestions?
Is there a way to put an inline low rpm fan or anything to sort of induce a very slow draft?
I am open to about anything.

Thank you in advance.

Tell me the exact location of each AAV. You are getting sewer gas. Is the pit vented, it must be if you met code. Check all connections at the pit and all around the lid, must be 100% ait tight.

There is one AAV in the wall (vented) next to the toilet and the same by the sink. None for the shower though. The issue is decidedly the pit as it is away from everything and easy to follow the smell. I cannot get it 100% tight despite replacing the rubber gasket. The vent stack is tight as well.

Use 100% cilicone caulk around all the joints on the basen lid and around where the pipes come out through the top of the pump basin. That should help seal in the odors. Good luck ----Zeke----

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The venting is where it got tricky. No economical way to the roof, we used those AAV's to tie into each of the drainage areas. They all tie together and join a stack coming out of the sewage pit and goes up and out of the house

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You can't do that!! The vent coming out of the pit MUST be a dedicated vent without a AAV installed or connected to the house vent stack.
No wonder your pit smells. You aren't venting the pit as the fixtures discharge into it. Let me explain. You have your fixtures vented with a AAV. This is fine as the fixture vent pulls air into the system as the fixtures drain.
However, the vent out of the pit's a different story. This vent not only pulls air INTO the pit as it pumps out the discharge but also vents air OUT as the fixtures drain into the pit. This is why It MUST be a dedicated vent all by itself to the out side, Although you may run it out of the basement and up the outside wall with some code resistrictions. What you have done is to defeat the pit vent and force the sewer gas out into your basement. Dig out the installation sheet and redo your vents. The AAVs will be fine for the fixtures but the vent coming out of the pit MUST be dedicated and separate. It MUST be able to vent out as well as in. Placing a AAV only allows it to vent in. Go back and correct your work. Good luck, Tom

It clear that this job was not done by a licensed plumber and there are several code violations that contribute to your problem. We also have some terminology issues since you can't have both "AAV in the wall (vented"). An AAV is a mechanical replacemnet for a vent, you don't have both. Follow Tom's instructions and build a proper vent. I suspected this issue when I did my first post.

Illinigfann,
You don't wish to receive either PM's or E-Mail so I can't contact you. You are allowing sewer gas to enter your home. Go back and read my post and correct the situation. Sewer gas's is a health hazard to your family. This should be looked after ASAP. Regards, Tom

Agree with Tom: You are sewer-gasing your entire house. Also, don't use caulking to seal the lid of the sewer ejector. Use what manufacturer supplies with the equipment: a foam-like, self-stick tape. Holes in the basin should have rubber gaskets.

I'm going to bump this up in hopes that the OP will see it and correct the problem. I would have PM'd or E-Mailed him but he put a block on contacting him. Let's hope he sees this. Tom

University Of Illinois is playing Lousianna today, both probably rained out from Ike. Mabe they will get back to us after Noah's arc docks in Chapmpaigne/Urbana Illinois.

If your pit were properly vented, then I would say silicone would be an option as far a sealing any small leaks. But I agree with speedball and ballenger