Plastic pushfit pipes

[andrewkay9]

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?

[Steve the gas]

Hi Andrew,

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

Good Luck

[plumbbob]

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.

[andrewkay9]

Thanks chaps, I guessed your answer, but needed to be reassured!!

[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. 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.

[chris_on_tour2002]

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?

[bobplum]

[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