Your idea sounds like a sure-fire recipe for disaster, pulled joints etc.

What type of shower are you fitting, does it not make some allowance for
mistakes such as your own. I installed an external bar type thermostat that
allowed (if I recall correctly) about 12mm adjustment.

Better than forcing the pipes, as that tension will always want to release
itself somehow (probably as a leak behind your tiles)

David

"Broadback" wrote in message
...
I've been revamping a bathroom, put 15mm piping (hot & cold) up the wall
for a bar shower. I was certain :-(( that I had placed them correctly,
but now I come to fit the shower the pipes are about 4-5mm too far apart.
Foolishly (in retrospect) I plastered over the pipes and then tiled,
thinking the more secure they were the better. I can get around the pipes
to a certain extent through the hole on the tile around each pipe. If I
carefully remove the plaster around, and as far down as I can reach would
the be enough flexibility in the pipes to close them up? Would it be
sensible to use a loop of rope and tighten it like a tourniquet with a rod
to draw them together? I'd better add that they terminate with a right
angle joint, and at the moment project from the wall about 5cm.
TIA