Baz wrote:
"deano" wrote in message
ups.com...
I am fitting a thermostatic shower valve into a stud wall.

The feed pipes will be surface mounted on the other side of this wall
(as they will be hidden at the back of a cupboard).

I got a couple of male 90° 22-15mm compression couplings to fit onto
the end of the pipes and up into the valve hot and cold inlets. This
way the pipes can go straight through the wall at a right angle.

When fitting the 90° couplings to the valve, how do I make them both
point in the correct direction (i.e. at right angles to the wall, so
they meet up with the feed pipes) when they are fully tightened?

Don't fully tighten them.

That is the point.

Fill the threads with hemp and putty, PTFE tape, theradloc or bits of
your hair soaked in beeswax.

Then screw them obnly as afr as they need to go.