Toilet cistern air lock

[Ewg46]

Hi there

I'm having a problem with my toilet cistern. When the toilet is flushed there is a load noise which vibrates through the cold water pipes and I can only stop this by turning on a cold water tap. I've checked the ball valve and diaphragm in the cistern and they appear ok. Any suggestions would be of help.

 

[steadyon]

1. Change the diaphragm. They go hard over time and tend to vibrate when opening and or closing.

2. If 1. doesn't work, fit a shock arrestor on the pipework to the WC.

 

[joni os]

Take apart fill valve, briefly turn water back on and off, to clear any sediment. Reassemble valve with new washer. Old washer might appear ok but rubber hardens with time.

 

[PlumbBobBob]

as above it will be the fill valve diaphragm

 

[Ewg46]

Thanks all for the advice. I'll let you know how it goes.

 

[Ewg46]

Hi everyone

Advise followed and cistern fixed. Thanks to all