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

["Raymond Kelly" <raymondtkelly@xxxxxxxxx>]

Went to my local plumbers merchant on saturday - bought the MDPE pipe
and
they stock 'talbot' - as the make of fittings. Bought only a push fit for
the end in my house to the 22mm copper. Under the ground I won't know until
we dig it up - luckily the mains connection is a few inches from my
boundar=
y
so can dig underneath. Once I know I would prefer a compression - as I'm
ol=
d
fashioned.
Will try to avoid drilling joists and might run parallel underneath with
some propriatery system - but will insulate. The plumbers might able to
advise on suitable insulation anyway. Sorry I'm not that far advanced yet,
but I'll be on screwfix forums later!
Probably not as interesting as HA - or maybe not!!
Maybe someone has a HA digging trench thingy?


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


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