How to fix score-marks in Hep2O pipe

[Steve]

Hi.

I need to connect to some 15mm Hep2O (i.e. plastic) pipe in my central heating, but the pipe has a long score mark where the joint will be; I'd guess it could be up to 0.5mm deep. I'm worried the joint will weep. It would be a bu**ger to replace the pipe back to where it is unscored.

The alternatives I can think of are:

- use a pushfit fitting with silicone grease or a PTFE-based jointing compound to fill the score mark;

- use a compression fitting 'clean', hoping the olive will compress into the score and/or the plastic will deform to give a good seal;

- use a compression fitting with some jointing compound or PTFE tape around the outside of the olive.

(It goes without saying that I'll need to use an insert, by the way!)

What are your view on the best approach?

Cheers

Steve

[fred]

In article , Steve writes

I think you are right that the original O-ring seal would be suspect.

Compression sounds the best and the 'liquid PTFE' suggestion sounds good but it needs to be on the pipe and under the olive to help seal the score. To get it there, smear some sealant on the pipe, push on the olive, rotating as you go, push it past the jointing point, smear on a tad more sealant on the pipe then pull the olive back. That should have everything slipped up nicely so make the joint.

[Dave Plowman (News)]

Compression fitting and Fernox LS-X round the olive before tightening.

[Grimly Curmudgeon]

We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember "Steve" saying something like:

Compression fitting with some joint gunge round the olive. Bob's yer Man from Bonkle.

[Steve]

Thanks all. Compression fitting + gunge it is.

Steve

[John]

---under the olive surely.

[Grimly Curmudgeon]

We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember "John" saying something like:

Doesn't matter, I've found. Sufficient gloop to do the job, but not too much.