Clonk Noise coming from mains water (solenoid valves only)

[pistonbroker]

Hi guys, as a sparky you'll have to excuse my terminology.......I did a search and this question didn't appear to come up before.

I get a single clonk from the mains pipework everytime an appliance with a solenoid valve operates. i.e. dishwasher, washing machine and outside tap timer. I don't get it with any other taps, toilet or anything where the pressure is released slowly. I suspect that the "all or nothing" functionality of a solenoid valve is causing some form of quick pressure release, leading to this clonk.

Do you think I could resolve this by fitting some form of pressure reducing valve at each appliance or is there an easier way? Or....am I completely missing something else?

Any reply gratefully received

cheers in advance

p

 

[buck51]

sounds like you have a loose pipe , more clips needed

 

[pistonbroker]

thanks for quick reply. Much appreciated.

If only it were that easy. the property is quite old and the pipework is under floors and through joists and in some rooms cannot be accessed. Also, I can't seem to pinpoint the exact location.

Is there a workaround or compromise to be had?

 

[buck51]

you could fit a shock arrester, a small expansion vessel, but it may cause more problems than it solves, ie. water hammer

 

[seco services]

never seen an arrester cause water hammer only prevent it.

 

[pistonbroker]

Thanks gents.

Would the expansion vessel be the same as for an unvented boiler or am I meowing up the wrong leg?

 

[pistonbroker]

Actually I've answered my own question. One of these:

http://www.cityplumbing.co.uk/getPr...ry=421&attribute=-1&fromSearch=&searchArea=-1

Do they have to be fitted in a precise location or can they be fitted at a convienient positon ?

thanx in advance.