Incoming mains black plastic pipe to 15mm copper

[Scott_D]

You don't need an insert with black poly

Just with a philmac type fitting?
They have always had insets when I have changed compression stop taps

 

[Jon]

If that is your incoming mains you will still need a stop tap somewhere or are you putting it further up in the copper?

Yes further along within the copper, no more than 2 feet away

 

[ShaunCorbs]

Just with a philmac type fitting?
They have always had insets when I have changed compression stop taps

The black poly is thick normally has an internal bore of around 15mm so an insert isn't needed

 

[Jon]

I have ordered a selection of different sized inserts in plastic and metal just in case when I take it apart it looks like it requires one.

 

[ShaunCorbs]

I have ordered a selection of different sized inserts in plastic and metal just in case when I take it apart it looks like it requires one.

There might be one in the compression stop tap joint

 

[Jim Goodenough]

There might be one in the compression stop tap joint

I've still got a few imperial copper inserts in my cellar somewhere !

 

[Best]

I have always used copper inserts in the black poly

 

[Tim S]

I always use an insert in any plastic/poly pipe, especially if your going to tighten a compression fitting on to it. Black mdpe used to come in high and low density which determined the size of the insert.