Help Identify This Pipe Type

Stu86 · Monday at 7:48 AM

I have this grey plastic pipe throughout my house in 10mm, 15mm and 22mm sizes. I'm planning to renovate my bathroom, but I can't find any manufacturer markings on the pipe itself. The only markings I see are some part or certification numbers which i cant find any info on but some text is in in polish?

All of the plastic fittings I can see around the house are grey Hep₂O fittings. The house is UK build from early 2000s and from what I've read, the older grey Hep₂O system is compatible with the newer white Hep₂O fittings.

I've never worked with plastic plumbing before, but everything I've read suggests that the pipe, inserts and fittings should all be from the same manufacturer.

Given that all the existing fittings appear to be Hep₂O, can I be reasonably confident that the pipe is Hep₂O as well and safely use the latest Hep₂O inserts and fittings?

Or would it be better to connect to the existing pipe using compression fittings and then run new, identifiable pipe from that point onwards?

I asked at my local plumbers' merchant, but unfortunately the young guy behind the counter did have any ideas.

Thanks for any advice

denso13 · Monday at 9:48 AM

Stu86 said:
Given that all the existing fittings appear to be Hep₂O, can I be reasonably confident that the pipe is Hep₂O as well and safely use the latest Hep₂O inserts and fittings?

I think it's safe to assume that. The important bit is matching the inserts to the pipe, just make sure thety are a snug fit. The fittings aren't so important.

Stu86 · Monday at 12:31 PM

Great, thanks. Just one other question. Would you recommend using the new-style Hep₂O inserts with the existing grey pipe, or would it be better to salvage and reuse some of the inserts from the current fittings?

The inserts that are already installed look slightly different. They appear to be smooth stainless steel, whereas the new Hep₂O inserts have a textured top and ribs along the sides.

If the pipe does turn out to be the older grey Hep₂O, are the current inserts and the latest inserts interchangeable, or is it safer to reuse the original style where possible?

Thanks again for the advice. I'm just trying to make sure I don't create any leaks

denso13 · Monday at 12:36 PM

Stu86 said:
are the current inserts and the latest inserts interchangeable

Yes, no problem.

MarleneGTran · 2026-08-14T10:44:34+0100

Stu86 said:
I have this grey plastic pipe throughout my house in 10mm, 15mm and 22mm sizes. I'm planning to renovate my bathroom, but I can't find any manufacturer markings on the pipe itself. The only markings I see are some part or certification numbers which i cant find any info on but some text is in in polish?

All of the plastic fittings I can see around the house are grey Hep₂O fittings. The house is UK build from early 2000s and from what I've read, the older grey Hep₂O system is compatible with the newer white Hep₂O fittings.

I've never worked with plastic plumbing before, but everything I've read suggests that the pipe, inserts and fittings should all be from the same manufacturer.

Given that all the existing fittings appear to be Hep₂O, can I be reasonably confident that the pipe is Hep₂O as well and safely use the latest Hep₂O inserts and fittings?

Or would it be better to connect to the existing pipe using compression fittings and then run new, identifiable pipe from that point onwards?

I asked at my local plumbers' merchant, but unfortunately the young guy behind the counter did have any ideas.

Thanks for any advice

Try checking the pipe markings or measuring its diameter first. A clear photo of the fittings and connections would also help identify the pipe type accurately

diynot

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Help Identify This Pipe Type

Stu86

Attachments

denso13

Stu86

denso13

MarleneGTran

DIYnot Local

Similar threads