Hi,

id like to have our bathroom waste water pipes layout changed,
at the moment they are all separate runs of pipe to the main waste pipe in the ground

can these legally all be joined together to one large pipe? (and run straight through the wall rather than diagonally under the floor then out the wall)
what size piping should be used?
does it need to have a breather vent?

can i do this myself? (legally)

is any sort of consent required?

i have attached an image of how it is now

thanks


Linkback: https://www.plumbers.nz/ask-plumbers-public/2/bathroom-waste-water-pipe-alterations/851/