Ungurgling my bathroom sink

[sparkybird]

Hi there

Done a search on this forum and I think I need to get an antivac waste valve for my sink to solve this problem.

I'm not quite sure if this replaces my existing sink waste or fits onto the end of it somehow? (The pics I've seen on the suppliers sites don't make it clear!)

Can anyone explain?
Thanks
SB

 

[chrishutt]

The simplest thing is to replace your existing trap (U bend) with one with an air admittance valve attached, known as an anti-syphon trap. If you get a trap of a similar configuration to the one you hqave it may be simpler to fit. There are lots of examples here.

 

[chrishutt]

Sorry, double posted .

 

[sparkybird]

Thanks Chris
On closer inspection, my u bend has an screw cap fitted on an 'exit' point the top of it - I'm not sure what this is for. Could it be for fitting an anti vac??
SB

 

[ChrisR]

Air admittance valves on traps do look much like just screw caps, but there are also some traps which have screw caps only for rodding. Unscrew it to see if there's anything inside. You can't add an aav to a trap itself.