Guide
What size core drill for a waste pipe or vent?
Check diameter, wall build-up, services and dust control before hiring a diamond core drill.
Quick answer
Core drilling starts with the finished hole diameter, not the tool name. Measure the sleeve, pipe or vent, then confirm wall build-up and service risk before choosing the drill and core bit.
Checks before hire
- confirm exact diameter and wall makeup
- check hidden services, lintels and cavity route
- plan dust or water control before drilling
- support the drill square to the wall
What to tell the hire desk
Describe the job, material or setting, scale, access and the thing that would make you stop. That gives the supplier a better route to the right machine, consumables and PPE than asking for a tool name alone.
Stop condition: Stop if unknown services in the wall; structural concrete or lintel uncertainty; working above shoulder height without support; occupied room without dust/water control.