Water Hammer?

[rpm]

Hi,
As some of you know I work on macerators which often means removing the toilet pan for access and sometimes I get water hammer in the cistern entry valve (both ball & float types) afterwards. The only thing I can think of is the fact that I Vac the cistern dry anyone know better?

Also what`s the fastest way of getting rid of it.

Thanks.

 

[Danv44444]

Siphon out with a u gauge hose into the toilet bowl

 

[Danv44444]

Ps go easy if there's blue block in there. Lol

 

[rpm]

Are you saying this is a cure for it? Sorry but how does that work?

 

[Danv44444]

Sorry think I may of miss understood. The first question. You sure it's not just air in the pipework? Do you change the diaphragm washer?

 

[rpm]

No don`t touch the valve at all, just isolate the water supply, disconnect the pipe from the cistern and remove cistern & pan as one but all to often I get water hammer as the cistern fills.

 

[PlumbBobBob]

perhaps the iso isn't on fully to start with but when you open it again you open it right up.

 

[rpm]

Nice idea, normally look first then leave it as I find tho

 

[RThomas010]

maybe theres a bit of air in the system or pressure too high