Hi all.
I drilled 25mm holes through the joists under the bathroom but
I will need arms like a gorilla to pull the 22mm pipe through.
I tried sanding the edge of the pipe and vaseline in the holes but still
too difficult.
The difficulty is caused by the holes not being horizontal.
I think I will have to block the holes. The only method I can think of
is 25mm (perhaps sanded or turned down to 24mm) dowel glued with Araldite.

Then I will cut slots for the pipework.

Am I doing the right thing or is there another technique I could try?

Arthur