I need something to add to my water pipes to stop the loud 'bang' when the
dishwasher inlet valve suddenly shuts or when someone closes a tap quickly.
I believe there are small air vessels that can be fitted to water pipes:

1. Who sells these?
2. Are they effective?
3. On what part of the system (i.e. inlet stoptap, last takeoff on system)
should they be fitted for best effect?

In article <6Vkfe.18804$wu2.7320@newsfe1-gui.ntli.net>, Steve
 writes

>I need something to add to my water pipes to stop the loud 'bang' when the
>dishwasher inlet valve suddenly shuts or when someone closes a tap quickly.
>I believe there are small air vessels that can be fitted to water pipes:
>
>1. Who sells these?

http://www.bes.ltd.uk , item 11355, 11quid +vat +post

>2. Are they effective?
Sometimes :-)
>3. On what part of the system (i.e. inlet stoptap, last takeoff on system)
>should they be fitted for best effect?

Near the source of the shock, except when it shouldn't be, or
near the stopcock, except when it shouldn't be, or
near any other volume reducing restriction in your pipework, except . . . .
oh I'm sure you get the idea . . .

What I'm trying to say is yes they can be effective, but placement can be
problematic for full effectiveness. In the case where you have a single item
turning off quickly and causing a shock wave, then placing the arrestor on
the fixed pipework within a foot of the dishwasher connection will probably
be effective. Placing it at the stopcock may also be effective and has the
advantage that it should arrest shock waves from other taps/appliances.

They are normally the solution of last resort so before trying one I would
tightly fix all pipework in the (kitchen) area with pipe clips to see if the
problem is reduced and as Stickems said, try turning down the stop cock
a tad.

HTH
-- 
fred

In article <Kgvfe.21223$l37.865@newsfe4-gui.ntli.net>, Steve
 writes

>Would it even be possible to make something myself i.e. a pipe upstand with
>air in it?


It'll work for a while but air is soluble in water under pressure so your
bubble will disappear and the problem will return.
-- 
fred

Yes Steve thats the way to do it. turning down the tap wont cure it it is 
caused by ripples in the (nornmaly plastic)storage tank turning the water on 
and off this asabates the effect causeing reciplical vibration in the pipes. 
air in an up right piece of pipe work will damp this down. Tried it and it 
works  MikeS
"Steve"  wrote in message 
news:Kgvfe.21223$l37.865@newsfe4-gui.ntli.net...

> Would it even be possible to make something myself i.e. a pipe upstand 
> with
> air in it?
>
> "Steve"  wrote in message
> news:6Vkfe.18804$wu2.7320@newsfe1-gui.ntli.net...
>> I need something to add to my water pipes to stop the loud 'bang' when 
>> the
>> dishwasher inlet valve suddenly shuts or when someone closes a tap
> quickly.
>> I believe there are small air vessels that can be fitted to water pipes:
>>
>> 1. Who sells these?
>> 2. Are they effective?
>> 3. On what part of the system (i.e. inlet stoptap, last takeoff on 
>> system)
>> should they be fitted for best effect?
>>
>>
>
> 

With great respect - What a load of rubbish!

"MikeS"  wrote in message
news:JSQfe.28798$G8.3848@text.news.blueyonder.co.uk...

> Yes Steve thats the way to do it. turning down the tap wont cure it it is
> caused by ripples in the (nornmaly plastic)storage tank turning the water
on
> and off this asabates the effect causeing reciplical vibration in the
pipes.
> air in an up right piece of pipe work will damp this down. Tried it and it
> works  MikeS
> "Steve"  wrote in message
> news:Kgvfe.21223$l37.865@newsfe4-gui.ntli.net...
> > Would it even be possible to make something myself i.e. a pipe upstand
> > with
> > air in it?
> >
> > "Steve"  wrote in message
> > news:6Vkfe.18804$wu2.7320@newsfe1-gui.ntli.net...
> >> I need something to add to my water pipes to stop the loud 'bang' when
> >> the
> >> dishwasher inlet valve suddenly shuts or when someone closes a tap
> > quickly.
> >> I believe there are small air vessels that can be fitted to water
pipes:
> >>
> >> 1. Who sells these?
> >> 2. Are they effective?
> >> 3. On what part of the system (i.e. inlet stoptap, last takeoff on
> >> system)
> >> should they be fitted for best effect?
> >>
> >>
> >
> >
>
>