Core drilling toilet waste

CAESAR32 · 11 Mar 2014

On a new build when core drilling the waste for an toilet that will go to an external stack what height do you core the hole at? Are most toilets 7.5inch to center of the waste.

PrenticeBoyofDerry · 11 Mar 2014

The centre of the spigot can vary, but generally around 180mm-190mm.

OvertonPlumber · 11 Mar 2014

Can always go down...can't go up!!

CAESAR32 · 11 Mar 2014

So maybe core drill out at inch center? Giving half an inch fall on the pipe

CAESAR32 · 12 Mar 2014

Would most people core drill a whole out about 7 inch centre?

newbuildinstaller · 13 Mar 2014

yes 6" hole too

PrenticeBoyofDerry · 14 Mar 2014

You need to account for the fall and also the finished floor level, when centralising the location of the hole.

Richardthe3rd · 14 Mar 2014

PrenticeBoyofDerry said:
The centre of the spigot can vary, but generally around 180mm-190mm.

I agree with my mate PBD. Fitted 100s of WCs & most are around that height.
7" FFS!!! We've been using the metric system since I started my time in the early 70s!

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Core drilling toilet waste

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