OS&B 1-1/2" Automatic Plumbing Vent

Replaces any secondary plumbing vent protecting the traps of kitchen sinks, bathroom basins, tubs, showers or washing machines. The Automatic Plumbing Vent is designed to prevent backflow of sewer gases and trap siphonage at the fixture. Vents by allowing air into the drain lines while the fixture is draining. An economical solution to preventing trap siphonage and backflow of dangerous sewer gases.

Installed according to the instructions, the V-200 will give dependable, lifetime service.
The sealing disc of the V-200 must be located at least 6” above the top of the trap arm. NOTE: An angle mounting of no more than than 15° from the vertical is acceptable. Two fixtures individually protected by the V-200 may be drained by a common 1-1/2” drain pipe. Minimum drain size for three or more fixtures must be 2”, and at least on pipe size larger than the largest connected trap or fixture drain. Location of the V-200 is in no way related to the flood level of the fixture that it’s venting. The V-200 functions equally well above or below the flood level of any fixture in the home. The V-200 may be used as a common vent or as the continuous vent in a wet vented system. One V-200 services 1 to 5 fixtures. Drain pipes must be sized according to applicable common and wet venting standards. The V-200 must be accessible for inspection or replacement. If installed whithin a wall, a simple access panel must be provided. IMPORTANT: The V-200 is to be used as a secondary venting means. Each drainage system in which the V-200 is used must have a main vent stack to atmosphere, located so as to vent the water closet.