Is there a correct position of the hole for washing machine pipes

[Stuart Porter]

We had water leak from the laundry sink into the cupboard below, then flow down the hole cut for the pipes (the hole was on the floor of the cupboard).. this water then went downstairs and flooded the downstairs bedroom that is directly above the laundry area.

It makes no sense to me to cut the hole for the pipes in the floor of the cupboard... if it had been cut into the side of the cupboard (30cm above the floor) and the floor of the cupboard had been left intact, this water would never have made it to the downstairs bedroom.

This is a brand new build (2023) in Hobart Tasmania

Any help most welcome

 

[James Auberon]

There's no stipulation regarding the pipe being in the wall, but there appears to have been a failure in the waterproofing of the floor or wall connections. That shouldn't happen - there are strict waterproofing requirements for 'wet areas' in the code, a wet area being "An area within a building supplied with water from a water supply system..." Including the laundry.