Air Valve All aspects of plumbing questions and answers, help, tips and information

[lancer]

I have a double sink with the waste from each sharing the same pipe through the wall to the drainShould I fit an air valve to stop the syphone from the traps and if so should it be the furthest from the drain?

[plumbbob]

There is no specific need to fit an anti syphon trap unless you are experiencing problems with the water seal being broken. If you do decide to fit a air admittance valve, it should be sited at the highest point which will be the furthest point from the drain.

[furgazoid]

I agree, but for the extra cost of less then £1 per trap, you cant go wrong with putting in anti-siphon traps

[lancer]

Thank you for your replies. Sorry for the delay I have been to busy to check the site