RE: [OT] : New water mains fitted... can I use MDPE pipe ineternally ?

[Marcus Warrington <marcus.warrington@xxxxxxxxxx>]

Laurence,

=20

Yes I've tried a shock arrester valve (from plumbworld) but it didn't make
=
much (if any difference). There where only a couple of places I could get
a=
ccess to fit it, non of which where near any taps or appliances so it may
w=
ell have been that. I've decided to wait and see what effect (if any) the
n=
ew supply (and larger supply pipe) has. If non, then I'll have to bite the
=
bullet and rip up the laminate flooring in the back bedroom.. since this
is=
the only place I haven't checked for a banging pipe.

=20

Marcus=20

=20

________________________________

From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of L=
aurence Mason
Sent: 18 June 2007 16:10
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] [OT] : New water mains fitted... can I use MDPE pipe
=
ineternally ?

=20

Marcus Warrington wrote:
>
> We've just had a new water mains fitted into our property to replace
the =
old lead mains. We are currently waiting for the "water board" to
come and =
inspect and commission it. The new mains comes into the property in the
opp=
osite cellar and I will need to join it up to the old pipe work when the
sw=
itch over. I want to take the opportunity to convert the main feed to 22mm
=
instead of the 15mm feed at present. At the moment we have a load bang
when=
ever a tap is shutoff or the washing machines fills. From what I've read
th=
is is either a banging pipe (which I've been unable to find) or "water
hamm=
er". Research on the net seems to say that using a larger pipe will
reduce =
the water velocity in the pipe and help reduce/prevent the water hammer
eff=
ect.
>
>=20
If it is water hammer try fitting a shock arrester - again you need to=20
know where the problem is and fit as close as possible.
BES http://www.bes.ltd.uk <http://www.bes.ltd.uk> 
have them for =A312.29 +=
the usual VAT and p&p

Regards,

Laurence

=20



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