UK trade guideTap Spares 5 min readUpdated 9 July 2026

How to Replace a Basin Tap (UK)

Fit a new basin monobloc or pair of pillar taps. Flexi tail sizes, back-nut and sealing washer.

BristanGroheIdeal StandardRoca

Monobloc vs pillar

Monobloc single-hole = flexi tails (3/8" or 1/2"). Pillar pair = 1/2" nuts to the basin waste tails.

Fit

Fibre or rubber sealing washer under the tap base — never silicone. Backnut hand-tight + ¼-turn with adjustable basin wrench.

Frequently asked questions

What flexi tail length do I need?
300 mm minimum for basin, 500 mm for kitchen. Never over-length — coil-style is fine.
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