Every property should have a Soil Stack Vent . It is usually an upward extension of the soil pipe which connects the toilets and other appliances to the sewage system. It allows air into the system to equalise pressures when appliances are discharged to the sewer. When fitted to the Soil Stack Vent the MAXI-VENT Air Admittance Valve allows air in, but prevents the unwanted odours from escaping.

If you have a septic tank there should also be a Septic Tank Vent that allows the system to "breathe". The MAXI-FILTRA Active Carbon Filter is installed in the Septic Tank Vent pipe. It allows air to flow in either direction whilst blocking the Hydrogen Sulphides that cause the smell. Please click on the above links to view the product descriptions and ensure that you order the correct product for your needs.