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Post by DIYDafty on Apr 19, 2019 19:54:12 GMT
What would you use? I was looking at buying another core bit from screwfix - smallest they do is 28mm.
Then I thought wouldn't it be cheaper to use say a 20mm sds drill bit? Would it be easier too?
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Post by tomplum on Apr 19, 2019 20:48:05 GMT
a 20 mm sds would piss through, the only thing is it will splay the brick if you go from the inside, so work out where you need it and go from the outside in,  |
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Post by cylinderfella on Apr 19, 2019 20:54:02 GMT
You can also go all the way through from inside with a low 6mm or 8mm and then when you have the hole outside, go back in the other way with the larger bit but Tom's way is more tidy and less of a gamble!
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Post by rocketmanbkk on Apr 20, 2019 5:58:49 GMT
💡
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Post by jcplumb on Apr 20, 2019 14:21:43 GMT
I've always gone from outside with an 18 or 20mm SDS bit, 20mm if there's an endfeed coupling on the pipe as long as there's no big snots.
As cinders says, you can go from inside out first with a small pilot, but you can still splay the brick with a little un, depends on the brick.
Only issue I ever get is if I hit the mortar line after the cavity and it sends the drill off horizontal, nicked a gas pipe once because of that. So make sure your drill is level all the way through and if your measuring is good you'll come out where you need to.
I must have done a few hundred outside taps in my career, done it this way every time.
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