Getting Water hammerage at boiler.

[Azz]

went to see a job and boiler is getting water hammerage when taps are closing fast. I thought this would be just hot water pipe as the taps in the house are quarter turns. The problem is, it is also causing hammage to boiler when using cold water pipes as well and when using the cistern flush.
I take it I need to install shock arestors but where would it be recommended?
the boiler is main combi 24he and I think, this problem is causing diverter valve damage as the customer changed valve a year ago and its already has leaking marks and domestic water heat is leting by to the heating side.
Any sugestions?

 

[townfanjon]

Your water hammerage !!! could be something as simple as a loose pipe/s .
Have you any idea what the mains pressure is ?

 

[Scott_D]

Old dead leg somewhere ?

 

[Azz]

I did try holding cold water and hot water pips firmly under boiler while having taps turned on and off to eliminate loose pipes but it is still hammering. Would this be correct to eliminate loose pipe diagnostic. The sound is mainly coming from boiler.

 

[Azz]

Not sure of mains pressure but it seemed average mains flow

 

[Burger]

If it’s at all outlets and we, then as above could be dead legs in system with trapped air. It can also be stopcock jumper or a failing quarter turn tap. It all depends on how much water hammer - is it vibrating the pipes whilst water is being used?

 

[Deleted member 32524]

I would look at pressure and cover the whole house with a pressure reducing valve after the stopcock.

 

[Azz]

No there are no vibration to pipes whilst in use.
Pressure just seems average.

 

[Old Account]

I would additionally get a shock arrestor installed underneath the boiler

 

[Burger]

I would be looking at the stopcock jumper and taps then to rule those out. Then maybe fit pressure reducing valve, shock arrestor.