Can Speedfit fittings be used on Grey Polypipe?

[zappastix]

Hi

I have been working on our new bathroom since June.

When I ripped out the old toilet walls, I found that many grey pipes
(from pictures I am sure these are Hep2o) are located in the stud partition,
three 22mm feeding 10mm & 15mm pipe work.

One of the fittings was weeping and over time (we have been here 8 years)
all but a small section of the floor plate/stud has disintegrated
because of this.

I capped the leak with a grey stop end.

As I haven't used barrier pipe before I started to read up on it
(from a PDF from another poster) and found that barrier pipe is guaranteed
for 25 years.

I think this Hep2o pipe was fitted around the early 90's.

So the fittings at least have a chance of breaking down.

So I have a problem, in as much as where these pipes are
located I will be fitting Aqua Board, shower tray and then tiling.

Where possible I want to cut the Hep2o in the loft before it
enters new bathroom and replace with JG Speedfit, run the new pipe work
'beyond' the stud work, and rejoin on the floor under
where the new shower tray will sit.

I cannot risk doing all this work and then a fitting fails, which I will not know about.

MY QUESTION

Is it possible to use JG Speedfit fittings on Hep2o?

Many thanks.

Stephen

 

[Burnerman]

The manufacturers would say not to mix and match, but as the external diameters are the same then providing the correct insert is used there shouldn't be a problem. I've done this, and no issues.
Why not consider changing from Speedfit to Hep20 using a brass compression coupling (with inserts)? Any failure is much reduced.
John

 

[zappastix]

Thanks Burnerman,

Sorry if this sounds stupid - when you say brass compression coupling am I right
in thinking you mean a regular brass compression fittings I would use when
using copper tube (when I cannot get into endfeed) or do you mean to use
Hep2o plastic with brass ends attached, which I have seen advertised.

If you mean regular brass compressions couplings that sounds like a more
reliable way - in as much as you can tighten down on the olive.

If so, are copper olives preferred?

Thanks again.

 

[Burnerman]

This method certainly works for me - just use a quality compression coupling such as Pegler and copper olives and the joint is permanent.
Correct inserts essential, of course!
John