Compression fittings and Plastic pipe - a cautionary tale

So you used a pipe support ,then there is the olive crimped on to the pipe ,then the nut holding both to the body of the fitting .....I'm still trying to figure how the pipe got pulled out .???

Stuart

I recall double-checking the joint tightness before the ceiling went up (and I hadn't forgotten the sleeve). It's a straight run of about 6m, I assume that lengthways thermal expansion/contraction has "worked it out" over the last 2 years.

Dave

I like the yorkshire range of copper push fits, they seem to be made extremeley well, fitted to plastic pipe with inserts they seem fine.

Looks like you forgot the plastic pipe support then

The compression fittings on plastic I did in 2000 (with pipe supports) had to have the olives cut off and replaced they were so firmly wedged, when I recently rearranged the plumbing. Lot easier with the proper plastic fixings (Hep2O) just cracked them open, removed pipe, replaced grab ring and O-ring, pushed in new pipe, job done.

Nope, the stainless support was looking at me when I shone a torch at the joint, the pipe was pulled back about 5mm.

Dave

So the pipe must have been pulled back through the olive 5mm ?

You certainly couldn't pull the pipe through the olive (or olive off the pipe or even get the pipe insert out) in all the compression on plastic I have taken apart. The olive has shrunk sufficiently to render it "stuck".