thats right its has a reducer then goes to the tea section its all 32mm and the old was 40mm but nothink is blocked becuz before i put the you bend on for the sink it would flow up that tube as well as back flowing?? there isnt a back valve for the washing machine either?
my washing machine waste pipe joins down to my sink waste pipe on a t section and the it goes to where i cant see, the sink pipe goes straight down to the top of the t pipe and the washing comes up from the bottom then the bit that tee's off is where it goes to where ever it goes, now iv had to...