soil stack?

Horizontal soil pipe runs should have a minimum fall of 1 in 48 , you will find that 90º bends are in fact 92½º to give that fall.
If you will be flushing toilet waste and you cannot get the sweep bends in , as Hi Spec Plumbing suggests, you may want to consider a macerator unit which will break up waste before discharging it into soil pipe, also, with one of thse devices you can discharge through 1½" waste pipe.

Pete
August 2007

>can the vertical stack be cut half way up, a bend put in

will any toilet waste be entering above the bend or are they entering below bend ?

if the toilet waste is coming out of wall down the soil pipe to a 90 degree bend along to another 90 degree bend then down.

the answer is no it's not practical, waste will come down hit the 90 degree bend and stop causing a back up and then a blockage.

can you not fit two 45 degree bends then your not restricting flow.

>the horizontal waste run from one upstair toilet will be about 8 feet.

max is 6m

hi-spec plumbing
August 2007