Review on 🔧 Oatey 39017 Sure-Vent Air Admittance Valve, 1.5" x 2", White by Danny Kimble

I used this on a 2 inch washing machine vent line at a sewage treatment plant, not a city sewer line. I have a mobile home that is connected to a sewage treatment plant. .When I drain the RV tanks, the gases from the septic tank and the odor are pushed back through the vent line into the room where the washer (and diverter valve) is located. My thoughts. The valve cannot withstand the pressure created when the large volume of wastewater (more than 20 gallons) is immediately discharged into the septic tank. The valve can work well for municipal sewage systems where little or no back pressure is possible. In addition, the valve uses a 2 inch threaded connection. The junction box for this valve uses a 1.5 inch female thread. The box is not tall enough to install the valve AND use the reducer. I wanted a valve box because I wanted to cover the valve with drywall leaving no way to replace the valve. if it fails without removing the drywall section. This valve didn't work for me.