kitchen sink pressure valve

[swhall]

Hi

I did have a kitchen sink blockage but this was fixed with some one stop. Now my blue pressure release valve keeps popping every time i fill the sink and pull the drain plug, yet the water flows fine if I keep the valve pushed in... any ideas would be appreciated,

Thanks

 

[Gray0689]

Don't understand how could a kitchen sink make a prv discharge can you post a picture of the prv and where is it situated

 

[PlumbBobBob]

i was confused over this as well

 

[WaterTight]

are you actually desribing a leaking anti-syphon bit on a trap?