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I wanted to know how to vent a Liberty 370 sewer pump. Its located in the basement slightly below the sewer line. Can I vent it with a Air Admittance Valve or can I vent it by attaching it to my main vent? The one that came with the house has this little black thing on top called a trap vent but once in a while it smells pretty bad around that area, like rotten eggs. If I can use a Air Admittance Valve, what DFU do I need? I see 20 and 160 on online stores. Or if I attach it to the main vent, will it cause a disruption to the other plumbing in the house?
Thanks for the responses.