On Feb 27, 10:23 pm, wrote:
Matty F wrote:
On Feb 27, 10:56 am, Harry Bloomfield
wrote:
After serious thinking wrote :

I have a clearance problem running a waste pipe between where I want
to put a washing machine and the adjacent wall. I need an extra
couple of cm compared with the existing 40mm waste pipe that's there.

Bit of a botch, but could you perhaps take the pipe out and heat up the
middle section enough to crush it into more of an oval shape - yet
leaving the ends round where they connect to fittings?

I was going to suggest that too. I've done that and it works. I used
boiling water to heat the pipe up.

Yes, I think it's the best option, cue lots of boiling water! Thanks
for the ideas everyone.

For a long pipe the heat gun may be safer than boiling water.
I was just bending a short piece of pipe so that it would fit into a
square pipe, funnily enough.