Geoff.D
Honorary Master
- Joined
- Aug 4, 2005
- Messages
- 26,878
I used core drills to make holes for ALL the new pipes installed when we renovated my daughter's kitchen. Makes for a very neat installation, with the hole placement precisely where needed, and even at an angle for the drain pipes. I used core drills available and a homemade jig to anchor the drill setup to the wall and hold it stable. Obviously, for larger diameters, a proper core drill would be better. You can get core drills easily up to about 60 mm in dia. Allow yourself 5-10 mm play if you are worried about having problems. We went for a very tight fit, and though it posed challenges, we were able to get away with it. The smaller the pipe diameter you are catering for, the less leeway you require. We even did the same with the tiling. Fine Diamond core drills were used to cut the tiles to exactly fit the pipes with 10 mm play in the diameter. most of the tiles were fitted before the fittings were installed as well and only one tile had to be split to allow installation.
Yes, I had to do that all myself. The professional tilers looked on in amazement and clearly could not be bothered because the work was finicky and required some very careful measurements.
Yes, I had to do that all myself. The professional tilers looked on in amazement and clearly could not be bothered because the work was finicky and required some very careful measurements.

