fitting new bathroom on top floor of 3 storey hse. toilet waste can be run ok, but cannot get basin or shower into that waste on that floor. can i take basin run it approx 2m with few bends to where shower is, shower and basin waste to run straight down from there but not easy to get into stack there. could i link the basin and shower together , (is there any issue of shower straight down with no straight run first), and tee into basin pipe below. basin only 32mm pipe below, any suggestions
