UK trade guideRadiator & Heating 5 min readUpdated 9 July 2026

How to Replace a Towel Rail Element (UK)

Fit or replace a 300 W, 600 W or 1000 W electric element in a dual-fuel or electric-only towel rail.

EcostradTermaReinaRointe

Sizing

  • 300 W — 400×800 mm small towel rail.
  • 600 W — 500×1200 mm medium.
  • 1000 W — 600×1800 mm large ladder.

Fit

Drain rad to below element boss. 1/2" BSP element into T-piece boss. Wire to fused spur (must be in Zone 3 or outside a bathroom zone). Fibre washer, no PTFE on the element seal.

Frequently asked questions

Can I use PTFE on an element?
No — the element seal is a fibre washer. PTFE cracks under thermal cycling.
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