I have to confess I've put my SDS straight through the mains cold pipe in a wall before.
It was ran in plastic off a coil so bowed as it went fown the cavity. Posh 5 bed house in a downstairs WC. just finished installing new WC and vanity along with tiling all walls in slate.
Last two holes to hang a mirror and went straight through the centre.
Mains water smacking you full on in the face whilst your also holding a 240v drill is not pleasant!
It was ran in plastic off a coil so bowed as it went fown the cavity. Posh 5 bed house in a downstairs WC. just finished installing new WC and vanity along with tiling all walls in slate.
Last two holes to hang a mirror and went straight through the centre.
Mains water smacking you full on in the face whilst your also holding a 240v drill is not pleasant!