Polyfast mdpe reducing set Still needs a liner?

[CAESAR32]

Hey when using the following polyfast mdpe reducer.
MDPE Reducing Set
(a) Remove nut from fitting and place over pipe end.
(b) Discard black/grey metric grab ring.
(c) Place nut reducer and new black grab ring over pipe end
(thickest section towards fitting body) Ensure the grab ring
is positioned at the end of the pipe.
(d) Insert barbed end of adaptor into pipe and tap in with
wooden mallet up to flange.
(e) Push black grab ring up to flange, if necessary.
(f) Push spigot end of adaptor into body of fitting to full socket
depth. Engage nut onto fitting.
(g) Hand tighten plus
1/8 turn using strap

When it refers to, Insert barbed end of adaptor into pipe and tap in with
wooden mallet up to flange. Do you still need a liner in the pipe or does the barbed end of the adaptor you tap in to the pipe act as a liner instead?

 

[Charnwood]

The barbed end is the liner. Nothing else required.

Should you ever use Philmac 3G fittings, theirs is the only system where liners ARE required with reducing sets.

 

[Agile]

Why do I see so many blue poly pipe in fittings where a liner has not been used?

 

[Charnwood]

I don't know, why do you?

 

[sooey]

That's a good question, but you could ask it about any plastic pipe system.
Charnwood, as an ex counter rat how many "tradesmen" bought pipe and fittings but no liners off you? Lot's or not many.

 

[Charnwood]

Charnwood, as an ex counter rat how many "tradesmen" bought pipe and fittings but no liners off you?

When I was a CR, many moons ago, my sarcasm skills were fairly well honed.
Any that did not ask for liners were met with the phrase "And there was me thinking these fittings need inserts." or "Would sir like inserts with those?"

As a distributor it was the CRs who forgot to ask for inserts.
It depended on my mood whether I suggested they are required.
The amount of dimblebrains who said "I didn't think you needed them for 50mm/63mm."

In answer to the question, most 'pros' asked for them.

Sarcasm: Lowest form of humour, but needing a high level of wit and intelligence to deliver correctly.