Studor 20302 Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve

Perfect stink pipe

The product is amazing it has a rubber gasket attached to it that fits over a 3-inch pipe or slides into a 4-inch pipe. I had a different brand put on last year when there was a lot of pressure it released a gas smell. And the other one went bad and I could not get the gas smell out of my basement that's sewer gas. I put this on yesterday came down this morning to the basement it smells fresh and clean with no sewer gas. I am excited to have this product well worth the money.I have attached the studor photo... and the competitors that does not work

Qualité vs prix est super

This item was installed to eliminate gaseous odors that build up in plumbing pipesEasy to install when replacing older part.

This is an excellent solution for a bathroom that is away from the main stack. Releases vacuum which allows flow of water out of sink, shower and toilet. An recent innovation for US that comes from Europe.