Solvent Weld Soil Pipes
Solvent weld soil pipe is cemented at every joint, giving a rigid run with no push-fit seals to creep, which suits a boxed-in stack or a duct that will be sealed behind plasterboard. Soil pipe fittings cover 110mm at 3m plus 32mm to 50mm waste, joining the WC through a pan connector.
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Choosing Solvent Weld Soil Pipes
Frequently Asked Questions
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.
110mm is the standard for a house stack taking a WC. 160mm is for a stack serving several flats or a commercial building where 110mm would be undersized. Waste-only runs from a basin, bath or sink use 32mm, 40mm or 50mm depending on the appliance, and join the stack through a boss.
Solvent cement for solvent weld waste and soil joints — nothing else makes that joint. Grab or panel adhesive for fixing panels and trims to a wall. Low-modulus frame sealant around a window, door or roof lantern. Clear sanitary silicone at a bath, tray or basin edge. uPVC cleaner prepares the surface and removes scuffs.
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.