I'm in the process of replacing the existing metal sink with a Belfast unit, and the waste pipe has been chased into the wall behind the current units. It also appears that allowing for the depth of the new sink, the replacement P trap will sit/connect about 50-60mm lower than the waste pipe itself.
Is it practical to have a height difference at the beginning of the water flow, or will I need to re-chase the waste pipe again?
Is it practical to have a height difference at the beginning of the water flow, or will I need to re-chase the waste pipe again?