Incoming mains black plastic pipe to 15mm copper

[Jon]

Hi.

Have a mid 1980’s house with the mains water coming in from underground via a black plastic pipe, of which the external diameter is 27mm. There does not appear to be any markings on it, but maybe some faint green.
This goes into a 15mm copper pipe via a stop tap with compression connections. There is a slight leak and due to a new room layout I need to take apart and reconnect the black plastic pipe straight to 15mm copper pipe without the need for the tap.

Is there a straight connector out there for connecting this 27mm black plastic pipe straight to 15mm copper pipe please?

Thanks, Jon

 

[ShaunCorbs]

Imperial polly best get a transition fitting to copper

Plasson/ philmac etc

 

[Scott_D]

Philmac utc

 

[Jon]

Thank you, will look into philmac. Is this polly stuff brittle? Should I be being very careful with it? and how’s best to cut the end off for the best joint?

 

[Scott_D]

Shouldn't be brittle but be gentle with it anyway
Don't forget an insert

 

[Jon]

Thanks. Forgive my ignorance but what insert?

 

[DGT plumbing]

Thanks. Forgive my ignorance but what insert?

An "insert" goes inside the black pipe to strengthen the side wall to prevent it being crushed or collapsing if stretched.

 

[ShaunCorbs]

An "insert" goes inside the black pipe to strengthen the side wall to prevent it being crushed or collapsing if stretched.

You don't need an insert with black poly

 

[Jon]

Ah yes I’m with you now! I guess until I take it apart I won’t know the diameter of the insert required? Although 22mm is most likely do you think?

 

[DGT plumbing]

Yeah ShaunCorbs is correct you don't need an insert.

 

[Jon]

Looking at Philmac now, but sooooo many fitting types I can’t work it out. The poly pipe is 27mm external diameter onto a 15mm copper pipe. Any idea which connector??

 

[DGT plumbing]

Maybe this one, code 1143
Products | Philmac

What I generally do is cut a bit of the pipe off and take it with me to the wholesalers.

 

[Scott_D]

15-21 x 21-27
copper x plastic

 

[Jon]

Thank you all, great advice and just what I needed. What tool is best to use to cut the plastic pipe to make a good end to connect?

 

[ShaunCorbs]

Plastic pipe cutters

TBH hacksaw will work needs to be filed afterwards and debured

 

[Jim Goodenough]

Hey Jon,

You know you've got to turn the water off at your boundary stopcock don't you.... otherwise you'll get a bit wet...😳😱.

Probably stating the obvious - no offence intended 😀

 

[Jon]

Hi Jim, already located and tested the boundary stopcock in anticipation for this job. But you were right to check with me as I’m A ‘newbie’ on here! and I can imagine it would be like being hit by a fire fighters hose!!!

 

[Jim Goodenough]

Hi Jim, already located and tested the boundary stopcock in anticipation for this job. But you were right to check with me as I’m A ‘newbie’ on here! and I can imagine it would be like being hit by a fire fighters hose!!!

Good for you Jon! I've got wet a few times as I reckon most plumbers have.... it's OK if it's summer time 🙂😀

 

[JCplumb]

Where's the new mains stop tap going if you're removing this one?

 

[Jon]

It will be slightly further along from the plastic pipe. About 2 foot away between 15mm copper pipe. Will that be ok?

 

[Jim Goodenough]

Where's the new mains stop tap going if you're removing this one?

Top question JCplumb,

I reckon Jon know's... (the OP)

 

[Jim Goodenough]

oh too slow... it's that time of night 😳😛😕😵

 

[Jim Goodenough]

It will be slightly further along from the plastic pipe. About 2 foot away between 15mm copper pipe. Will that be ok?

As long as it's easy to access

 

[Jon]

Yes easily accessible thanks Jim

 

[Vicdiy]

Hi.

Have a mid 1980’s house with the mains water coming in from underground via a black plastic pipe, of which the external diameter is 27mm. There does not appear to be any markings on it, but maybe some faint green.
This goes into a 15mm copper pipe via a stop tap with compression connections. There is a slight leak and due to a new room layout I need to take apart and reconnect the black plastic pipe straight to 15mm copper pipe without the need for the tap.

Is there a straight connector out there for connecting this 27mm black plastic pipe straight to 15mm copper pipe please?

Thanks, Jon

View attachment 34813

View attachment 34814

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