Polyork

It's a solvent weld system that's now obsolete.

I do come across it though and when we do we get a compression coupler from a local plumbers merchant.
I just ask for a polyork to copper 15mm coupler and he goes in the back of the shop and produces one.
it goes onto polyork without inserts and you tighten it up as normal.

It's a Kuterlite (gunmetal) fitting that's really made for underground and they cost you about £16.00 each!
Sorry I don't know anything more about this rather oddball fitting other than it's excellent for joining polyork to copper.  

Good luck,

Tappy,

Transition fittings work on it fine endfeed.  Polyorc what a load of shite that stuff is smiley-chores037 binsout

does the transition coupler come with an inset?or do you just wack it on the polyork? The transition coupler are they a philmac fitting?

I do alot of work for a chain of garden centres and the irrigation boys use similar piping from the big holding tanks.

   That looks more like the fitting that I've used on polyorc battle, interesting to know that it's actually a

   proper fitting that's made especially for the job!

   The transition fitting is probably the best to go for E/F because your underground whilst battles is the better

   looking one for inside work I would say.

  

The pipe is going to be rigid,as its in the ground. Do these philmacs slip up and down the pipe? Dont fance flexing the polyorc!ill stick a couple of elebows down there if not 

smiley-laughing021