Valves for Wide Towel Radiators: Connections and Clearances

Quick answer: Choose valves for a wide towel radiator from the pipe route, radiator connection direction and available clearance. Straight and angled describe the connection path; manual and thermostatic describe control. Confirm the exact valve drawing and assembled dimensions before ordering.

By M Tasan · Published 4 November 2026

Part of our wide towel radiator buying guide.

Width does not tell you which valve to buy

A 550mm and an 800mm rail can need the same valve type, while two installations using the same radiator can need different types. The difference is often where the pipes emerge and how they meet the radiator. The finish and body width are only part of the specification.

This guide supports our wide towel radiator buying guide. It focuses on access and assembled fit, especially where a wider body leaves less room beside a vanity unit, shower screen or adjacent wall.

Straight or angled?

A straight valve connects along a straight path; an angled valve changes direction. Pipes rising from the floor and pipes emerging from the wall often suggest different arrangements, but the radiator’s connection orientation must be checked as well. A photograph alone is not enough to guarantee which valve will fit.

Compare the connection drawing for the exact rail and valve. Ask the installer to confirm pipe size, connection compatibility and the direction of the valve head. Do not force an unsuitable valve into place or assume that all valves with the same finish share identical dimensions.

Manual or thermostatic is a separate choice

A manual valve is adjusted by hand. A thermostatic radiator valve responds to the surrounding temperature, while the overall heating system has its own control arrangement. Choosing an angled valve does not automatically mean choosing a thermostatic one.

Energy Saving Trust’s heating-controls advice explains how thermostats and radiator controls perform different jobs. Ask your installer which arrangement suits the bathroom and the rest of the system, including any required flow path. Do not add a control solely because it looks similar to the existing valve.

Allow room to use and maintain the valves

Mark valve positions on your wall plan as well as the radiator outline. Check that a hand can reach the controls and that a nearby drawer will not strike them. Leave the installer room to make connections and consider future access if a valve needs attention.

A valve may extend beside or below the radiator. This means the complete installation can occupy more space than the stated body width or height. Our 550mm to 800mm width guide is a shortlist tool; it does not replace the assembled valve dimensions.

Pipe centres are not the whole assembled measurement

In our towel radiator ranges, centres are 50mm less than body width: a 700mm rail has 650mm centres. That is the radiator connection spacing. The position of the existing pipes after the valves are fitted still depends on the valve design and pipe route.

For a replacement, keep the old body measurements, connection centres, wall projection and valve photographs together. Use our replacement pipe-centre checklist before assuming the old pipes can stay exactly where they are.

What comes with the radiator?

Our towel radiators are supplied with wall brackets, an air vent and a blanking plug. Valves are separate from a radiator-only purchase. Check the selected product and option before checkout so that you know whether you are ordering a rail alone or adding a valve pair.

Where straight and angled valve add-ons are offered, the listed supplement is £16.99. Check the current selected option and basket total rather than relying on an old screenshot. Wall suitability and fixings still need an installer’s assessment.

What if you want an electric element?

A central-heating valve pair does not turn a rail into a complete electric or dual-fuel installation. The radiator, element, filling arrangement and controls must be compatible. Electrical Safety First advises using a registered electrician for bathroom electrical installation work. Do not select an element simply because its wattage resembles the radiator’s water-heating output.

Make the final accessory check

Browse radiator valves and heating accessories once the connection arrangement is confirmed. Match the finish afterwards, using our black-or-chrome guide if needed. If anything is unclear, send the product link and photographs of the pipe route before ordering, rather than guessing from the width.

Sources and scope

• Energy Saving Trust: heating controls
• Electrical Safety First: bathroom electrical safety

External sources support the general heating or safety points identified above. Product dimensions, supplied fittings and range examples refer to Cheap Radiator’s listings; confirm the selected product before ordering. This is buying guidance, not an installation specification.