Plastic pushfit pipes


Postby andrewkay9 » Wed Oct 22, 2008 5:53 pm

I am currently plumbing a new central heating system and although I started one half of the house in copper I want to use the other side with plastic pushfit pipework as it is quick and easy, can anyone recommend which manufacturer to use, i.e. speedfit etc?
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Postby Steve the gas » Thu Oct 23, 2008 4:43 am

Hi Andrew,

Yep speedfit,make sure you use the pipe inserts in ALL your fittings.

Good Luck
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Postby plumbbob » Thu Oct 23, 2008 1:27 pm

Tut, tut. You've done half a quality job, and now........

I'm with Steve. Speedfit wins if for nothing else, most of their fittings have double seals.
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Postby andrewkay9 » Thu Oct 23, 2008 5:12 pm

Thanks chaps, I guessed your answer, but needed to be reassured!!
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Postby margy » Sat Oct 25, 2008 12:53 am

Probably telling granny how to suck eggs, but I learned that the inserts from polypipe to the speedfit pushfits can be either plain or with the extra seal BUT the inserts from polypipe to metal shut-off valves HAVE to be plain. Otherwise the extra seal gets in the way of the olive being tightened correctly.
I have such worries about the short lenth of polypipe that goes into the shut-offs, that I make them up with compression to copper either side and push fit connectors from there on. May not be everyones choice, but at least I feel there is a better seal as far as I am concerned.
Plumbing is such fun - just like my brothers' mechano used to be.
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Postby chris_on_tour2002 » Sun Oct 26, 2008 10:49 pm

hep 20 if using plastic for heating systems as it is 'barrier' pipe, ie will not allow air into the system via the walls of the pipe. but why change to plastic if half is already copper?
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Postby bobplum » Mon Oct 27, 2008 9:52 am

[quote="margy"]Probably telling granny how to suck eggs, but I learned that the inserts from polypipe to the speedfit pushfits can be either plain or with the extra seal BUT the inserts from polypipe to metal shut-off valves HAVE to be plain.

i stand corrected but you should never mix manufacturers
bob
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