400mm Wide White Towel Radiator

400mm wide white towel rails with a 350mm pipe centre — a compact, space-efficient width that fits into tighter bathroom and en-suite walls where a wider rail would not be practical. Available in central heating, dual fuel, and pre-filled electric. Heights from 400mm to 1800mm. Free UK delivery on orders over £200. 5-year manufacturer's warranty on every rail. Last updated August 2026.

Central Heating, Dual Fuel or Electric?

Central heating — connects to your existing boiler flow and return. All heights from 400mm to 1800mm. Output figures measured at dT50 to BS EN 442.

Dual fuel — runs on the boiler through the heating season, switches to the electric element for summer use. Available in 600mm to 1400mm heights. One rail covers both.

Pre-filled electric — plugs into a standard 13A socket, arrives filled and ready to hang. Available in 1000mm and 1200mm heights. No pipework required. Not sure which heating type suits your bathroom? See our central heating vs electric guide.

Will a 400mm Wide Rail Fit Your Wall?

The measurement that matters is the pipe centre distance: 350mm. This is the horizontal gap between the centre of your flow pipe and the centre of your return pipe. All 400mm wide rails in this collection use a 350mm pipe centre (rail width minus 50mm).

Use our BTU calculator to confirm the heat output you need before selecting a height. Then measure these on your wall:

• Pipe centres: 350mm horizontal
• Wall-to-pipe distance: 75–95mm (standard installation)
• Connection: 1/2" BSP, compatible with 15mm compression valves
• Minimum clear wall width: 500mm recommended

At 400mm wide, these rails work well in smaller bathrooms, cloakrooms, and en-suites where a 500mm or 600mm rail would leave too little wall space. The gloss white powder-coat finish suits bathrooms with white sanitaryware, painted walls, and modern or classic décor alike. The taller options (1200mm and above) are useful where the primary function is heating the room rather than drying towels — a taller rail moves more air and outputs more BTUs from the same wall footprint.

White Finish — Care and Longevity

All rails in this collection use a gloss white powder-coat finish over mild steel, applied electrostatically and oven-cured for adhesion. The finish is resistant to everyday bathroom moisture and cleaning. Wipe with a damp cloth and a mild household cleaner if needed — avoid abrasive pads or strong chemical cleaners, which can dull the surface over time.

White powder coat hides fingerprints better than chrome and does not show water spots. It is a practical everyday finish for family bathrooms. If the finish is chipped by impact during installation, small touch-up paint pens (RAL 9016 traffic white) can be used to protect the steel underneath.

Frequently Asked Questions

What is the pipe centre distance on a 400mm wide white towel rail?

The pipe centre distance is 350mm — the horizontal gap between the centre of the flow connection and the centre of the return. Measure between your existing pipe centres before ordering. If your pipes sit at 350mm apart, these rails fit directly without any pipework changes. If your centres are slightly different, a plumber can adjust the tails during installation using standard 15mm copper fittings and angled valves, which give roughly ±15mm of horizontal play.

Which height should I choose for a 400mm wide rail?

Use the BTU calculator to match the heat output to your room. As a general guide: 400mm and 600mm high rails suit cloakrooms and small en-suites; 800mm to 1000mm suit standard bathrooms; 1200mm and above are best for larger rooms or where the towel rail is the primary heat source. The 1800mm option is tall enough to serve as the sole radiator in a medium-sized bathroom. For any room where heating is the main priority, choose the tallest version your budget and wall allow.

Are dual fuel rails available in all heights at 400mm wide?

Dual fuel is available in 600mm to 1400mm heights for this width. The 400mm, 1600mm, and 1800mm heights are central heating only. For the 1000mm and 1200mm heights, you can also choose the pre-filled electric version if you do not have existing pipework. Dual fuel installation requires both a plumber (central heating connection) and a qualified electrician (element wiring), as required for bathroom electrical work in the UK.

Related Collections

• All white towel rails — the full white range across all widths and heights
• 400mm wide chrome towel rails — same width in chrome finish
• Dual fuel towel rails — all dual fuel options across widths and finishes
• Electric towel rails — pre-filled electric rails, all sizes