In article ,
David Klyne wrote:
I have recently extended some pipework using compression fittings. It
had been suggested to me that I should not over tighten the fitting as
the olive could cut into the pipe. Now I have notice on a couple of the
fittings that whilst they appear water tight there seems to be a powery
deposit forming round where the pipe goes into the fitting. It suggests
to me that I have not tightened them correctly but would appreciate any
feedback.

A correctly tightened compression fitting should have the ring compressed
so that it can't be removed from the pipe easily. And you'd have to use a
deal of force to overtighten one. So not easily done with the correct
spanners. You'd have to be using extra long types.

IMHO most give problems because of damage to the pipe in some way -
linear scratches being a favourite cause by the pipe being pushed through
some small hole etc. That's the beauty of a soldered joint - if the pipe
and fitting are cleaned properly solder will fill any such small
irregularities.

--
*Be nice to your kids. They'll choose your nursing home.

Dave Plowman London SW
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