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

["Paul Bendall" <paul@xxxxxxxxxxxxxxxxx>]

Marcus,

I recently bought some MDPE plastic pipe that was black and UV=20
stabilised and approved for carrying drinking quality water above=20=20
ground use. I bought it from here but you'll probably find other=20
places as well:

http://www.lbsgardenwarehouse.co.uk/product.asp?
pf_id=3DPP01B&recno=3D2&cid=3DXNV2OH4RGIKBM3FWDA7YL31F05YDUC4Q

As for clamps one of the other sites I bookmarked for my irrigation=20
project has 25mm clamps:

http://easywatering.co.uk/acatalog/MDPE_CLAMP.html

HTH

Paul

--- In ukha_d@xxxxxxx, Marcus Warrington=20
<marcus.warrington@...> wrote:
>
> Thanks Raymond.
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> My pipe comes in to the cellar and then runs along the underside of=20
the staircase and then under the upstairs landing so no chance of any=20
sunlight.. so unless it looks like the way I'll do it.
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> How are you securing the pipe.. i.e. I've not found any 25mm pipe=20
clips around.. are you just drilling through joists and feeding=20
through the hole ?
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> One other question.. are you planning to use the push fit=20
connectors or the compression type. The compression type are quite=20
bulky but cheaper.
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> Thanks
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> Marcus=20
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> ________________________________
>=20
> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On=20
Behalf Of Raymond Kelly
> Sent: 18 June 2007 15:17
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] [OT] : New water mains fitted... can I use=20
MDPE pipe ineternally ?
>=20
>=20=20
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> Thinking about the same and am on the SelfBuild List.
> I've been looking at the screwfix forums - which are pretty good.
> The general question is about the MDPE pipe - which ideally is an
> underground pipe ie connects to the mains water in under your=20
path/drive
> then should be 750mm dug in trench and ideally when it comes up=20
above ground
> ideally change to copper. The actual rules etc are a bit vague but=20
least to
> say that the blue pipe should not be exposed to sunlight. What I am=20
doing is
> run a single pipe from the water connection to my main presentation=20
within
> the house in a single piece. Within the house its under the=20
floorboards &
> insulated - till it gets to the presentation point at which point=20
it has a
> 22mm copper connection.
> When I spoke to the water board they did not seem to care what=20
happens in my
> property.
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> On 18/06/07, Marcus Warrington <marcus.warrington@...=20
<mailto:marcus.warrington%40mis-es.com>
> wrote:
> >
> > Sorry to be off topic but I know a lot of people are on the
self=20
build
> > list as well, so I thought I might get a quick answer to my=20
question.
> >
> > We've just had a new water mains fitted into our property to=20
replace the
> > old lead mains. We are currently waiting for the "water
board" to=20
come and
> > inspect and commission it. The new mains comes into the
property=20
in the
> > opposite cellar and I will need to join it up to the old pipe=20
work when the
> > switch over. I want to take the opportunity to convert the
main=20
feed to 22mm
> > instead of the 15mm feed at present. At the moment we have a
load=20
bang
> > whenever a tap is shutoff or the washing machines fills. From=20
what I've read
> > this is either a banging pipe (which I've been unable to find)=20
or "water
> > hammer". Research on the net seems to say that using a
larger=20
pipe will
> > reduce the water velocity in the pipe and help reduce/prevent
the=20
water
> > hammer effect.
> >
> > The mains enters the house in blue MDPE pipe which the has a=20
compression
> > fitting 25mm to 15mm stop tap fitted. I have a run of about=20
25meters from
> > this new tap to the upstairs point where the water mains
splits=20
into two
> > (one way being supply for Utility and kitchen, the other is
the=20
supply for
> > bathroom and shower room). Looking at the price of copper its=20
going to cost
> > me in the region of =A3100 just in pipe to do that run, so I'm=20
thinking.. is
> > it acceptable to simply change the stop tap to 25mm-25mm and
then=20
run a 25m
> > length of blue MDPE pipe internally to this point ? I'm sure=20
that's what the
> > builders did in our last house, but don't want to spend the
=A340=20
and time and
> > effort just to find that the "water board" then refuse
to connect=20
it.
> >
> > Just to bring it slightly on topic, this pipe will be running=20
across the
> > ceiling of the old larder cupboards which will start becomeing
my=20
node0 as
> > soon as this work is completed :-)
> >
> > Thanks,
> >
> > Marcus
> >
> > [Non-text portions of this message have been removed]
> >
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> >
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