>> You have it in one - it's quicker and cheaper. No other benefits.

> Two more benefits

> 1) Pikeys cannot pinch it and weigh it in.

> 2) You can get the plastic pipe into places you cannot get copper pipe.

> As for cost, plastic is only cheaper due to the labour charges saved
> when you pay someone to fit it for you. Plastic fittings are still too
> expensive to make it a cheaper option for a DIYer who pays no labour
> charges and is capable of doing a solder joint.

> One big disadvantage of plastic fittings are their size. They are
> bloodly ugly if on view and you also need a deeper notch on the joists
> to fit them under floorboards.

>> On a CH system you usually need more connectors than metres of
>> pipework.

> That's because you haven't done one in plastic.. one connector at each
> end of two pipes to each rad, little more.

>
> "dennis@home" killspam.kicks-ass.net> wrote in message
> news:fvqj7h$cdb$1@news.datemas.de...

>>
>>
>> "ARWadworth" blueyonder.co.uk> wrote in message
>> news:4W2Uj.20754$yD2.10377@text.news.virginmedia.com...

>>>
>>> "dennis@home" killspam.kicks-ass.net> wrote in message
>>> news:fvq9mj$jd$1@news.datemas.de...

>>>>
>>>>
>>>> "Dave Plowman (News)" davenoise.co.uk> wrote in message
>>>> news:4f9b373647dave@davenoise.co.uk...

>>>>> In article ,
>>>>> dennis@home killspam.kicks-ass.net> wrote:
>>>>>
>>>>> ...

> In article ,
> dennis@home killspam.kicks-ass.net> wrote:

>>> On a CH system you usually need more connectors than metres of
>>> pipework.

>

>> That's because you haven't done one in plastic.. one connector at each
>> end of two pipes to each rad, little more.

>
> Think single pipe systems are out of fashion these days...

> I have a problem with plastic pipework in that when the need arises to
> drill a wall for a shelf etc. the plastic pipe will not register on ANY
> detector but the pipe will still make as much mess if drilled. Why have
> we gone down this route (apart from cost issues on installation times)?

> "Dave Plowman (News)" davenoise.co.uk> wrote in message
> news:4f9b7139cfdave@davenoise.co.uk...

>> In article ,
>> dennis@home killspam.kicks-ass.net> wrote:

>>>> On a CH system you usually need more connectors than metres of
>>>> pipework.

>>

>>> That's because you haven't done one in plastic.. one connector at each
>>> end of two pipes to each rad, little more.

>>
>> Think single pipe systems are out of fashion these days...

> Where did I mention single pipe?

> For an joint made at ambient there will not be enough contraction to
> cause the problem you describe.

>>> But it is £9.97 for a 10 pack of 15mm JC elbows and only £3.60 for 10
>>> copper elbows. That is a 2.77 to 1 cost ratio.
>>>
>>> On a CH system you usually need more connectors than metres of pipework.

>>
>> That's because you haven't done one in plastic.. one connector at each
>> end of two pipes to each rad, little more.

>
> With a comment like that, it shows who has not installed a full CH system,
> plastic or otherwise.

> On 6 May,
> Ed Sirett makewrite.demon.co.uk> wrote:
>

>> I bought a 25m real of PB (grey) pipe for about £25 quid last week.
>> I'd pay about £47 for 30m of Cu. That's not even 2:1.
>> It's the installation time that is the clincher.
>>
>> I hate the (usually) white PEX plastic pipe. It is just to stiff to be a
>> big advantage over copper.

>
> Is there any good reason why (blue) MDPE can't be used for indoor cold
> water
> services, apart from appearance? It's even cheaper, more flexible and
> seems
> to work well out of sight.

> In article ,
> dennis@home killspam.kicks-ass.net> wrote:
>
>

>> "Dave Plowman (News)" davenoise.co.uk> wrote in message
>> news:4f9b7139cfdave@davenoise.co.uk...

>>> In article ,
>>> dennis@home killspam.kicks-ass.net> wrote:

>>>>> On a CH system you usually need more connectors than metres of
>>>>> pipework.

>>>

>>>> That's because you haven't done one in plastic.. one connector at each
>>>> end of two pipes to each rad, little more.

>>>
>>> Think single pipe systems are out of fashion these days...

>

>> Where did I mention single pipe?

> ...