Push Fit Waste Pipes
Push fit pipe joins with a seal rather than solvent, so a waste run can be assembled, dismantled and reused without glue or curing time. That suits a bathroom refit or a repair behind a bath panel. Sizes cover 32mm and 40mm waste pipe in 3m lengths. Where a run gets sealed behind plasterboard, solvent weld makes the safer joint.
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Choosing Push Fit Waste Pipes
Frequently Asked Questions
32mm is for a hand basin. 40mm covers a sink, bath, shower, washing machine and dishwasher — anything discharging a larger volume. If in doubt, 40mm. Running a basin in 40mm is not a problem; running a bath in 32mm is, and it shows up as slow draining and gurgling.
A P trap where the waste runs horizontally into the wall, a bottle trap where it drops and space behind the basin is tight, and a shallow trap under a bath or shower tray where there is very little height. Telescopic versions take up the difference in a cupboard where the pipe centre does not line up.
Push fit seals on a ring, so a run can be dismantled and reused and there is no curing time — useful for a repair, or anywhere access stays open. Solvent weld is cemented rigid at every joint, which suits a stack that will be boxed in or a run sealed behind plasterboard, where a creeping seal is a real problem.
Yes — without air entering the stack, a discharging WC can siphon the water seal out of nearby traps and let drain smells into the room. Traditionally the stack runs open to above roof level. An air admittance valve is the alternative where taking the stack through the roof is not practical, but at least one stack on the system should stay open.