40 mm Air Admittance Valve Or Anti Syphon Valve
For Allowing Air In But Not Out of Soil Pipework
Push-Fit -Durable Quality PVC -Fast fit with no tools required
The anti syphon valve when fitted allows air to pass into the pipe work but not out.
This prevents the common problem of water being sucked from toilet pans and waste traps when waste is flushed away.
Other benefits include: No smells entering property, Waste is not held back due to suction effect, The one way valve prevents drain smells.
*Due to supplier stock changes unit supplied may In future differ slightly from item shown
Use: Soil waste i.e Sewerage from toilets, kitchens etc or for soil stack vent pipework This Small 40 mm model is usually used to correct problems from a Basin, Sink or near an appliance that uses 40 or 50 mm pipe work.
For a Toilet or an entire drain branch with multiple Inlets like a WC check out our 110 mm Anti Syphon Valves