UK trade guideBathroom Spares 4 min readUpdated 9 July 2026

How to Replace a Sink Waste (UK)

Fit a 1 1/2" strainer waste with overflow on a kitchen sink. Basket, plug and washer sequence.

McAlpineFrankeReginox

Overflow or not

Kitchen sinks with a factory overflow hole require an overflow-connected waste. Bowls without overflow use a plain waste.

Fit

Silicone bead on the waste flange top-side. Rubber gasket underneath. Backnut fully tightened. Trap on 40 mm outlet.

Frequently asked questions

Why is my new waste leaking?
Usually silicone missed a section on top-side. Redo — never use plumber's putty on stone or composite worktops (stains).
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