Also, even with pilot hole(s), there is a chance you'll knock a chunk of plaster off the wall on the exit hole. Not a massive deal, but have a think about which side would be easier to do a bit more making good on before you start just in case, if you have the luxury of being able to drill from either side.
When I put the outside tap in, I drilled from the outside in as I didn't want to risk blowing out a chunk of external brick work. Still managed to knock off about 2sq ft of plaster on the kitchen wall, but it was behind the washing machine so didn't really care after the initial "ah, fuck".
Also, if you are sloppy, like me, an SDS+ drill couldn't give two fucks about pilot holes. I drilled one at 8mm before going through with the 16mm thinking one would follow the other. I ended up with one hole on the outside and two different sized holes on the inside as the 16mm just fucked off wherever it wanted to. But just be more careful than I was and it'll be fine.
Also, even with pilot hole(s), there is a chance you'll knock a chunk of plaster off the wall on the exit hole. Not a massive deal, but have a think about which side would be easier to do a bit more making good on before you start just in case, if you have the luxury of being able to drill from either side.
When I put the outside tap in, I drilled from the outside in as I didn't want to risk blowing out a chunk of external brick work. Still managed to knock off about 2sq ft of plaster on the kitchen wall, but it was behind the washing machine so didn't really care after the initial "ah, fuck".
Also, if you are sloppy, like me, an SDS+ drill couldn't give two fucks about pilot holes. I drilled one at 8mm before going through with the 16mm thinking one would follow the other. I ended up with one hole on the outside and two different sized holes on the inside as the 16mm just fucked off wherever it wanted to. But just be more careful than I was and it'll be fine.