Thermostatic Radiator Valves

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Buying guide: Thermostatic Radiator Valves

A thermostatic radiator valve (TRV) controls the flow of hot water into a radiator according to the temperature of the room. A sensing head opens and closes the valve as the air warms and cools, so each room can be held at its own setting. TRVs are normally paired with a lockshield valve on the other end of the radiator, which the installer sets once to balance the system.

Body style and size

  • Angled or straight: angled bodies suit pipes rising from the floor or coming out of the wall; straight bodies suit pipes that run in from the side.
  • Pipe size: 15mm is standard; 10mm and 8mm suit microbore systems, sometimes with reducers.
  • Connection: compression ends are the most common, with push-fit and drain-off versions also made.
  • Flow direction: bi-directional valves can go on either the flow or the return pipe; others must go on the flow, so check the arrow on the body.

Heads

Standard heads use a numbered scale, usually from a frost setting up to 5. Wireless and smart heads add timed or app control. The M30 x 1.5 thread is widely used for heads, but some valve bodies use other connections, so check compatibility or use an adaptor.

Standards and regulations

Look for TRVs tested to BS EN 215. In England, when a boiler is installed or replaced, Approved Document L expects TRVs on every radiator except in the room with the main room thermostat. Keep heads clear of curtains and radiator covers so they sense the room temperature properly.

For valves without a thermostatic head, see manual radiator valves.

About Thermostatic Radiator Valves

BHL lists thermostatic radiator valves products within the Radiators & Accessories range of our Heating & Plumbing department. Brands with products here include Invensys Drayton, Pegler Yorkshire and Own Brand.

Brands

Brands with products in Thermostatic Radiator Valves at BHL include those listed below, each linked to its own brand page.

Finding products in Thermostatic Radiator Valves

Thermostatic Radiator Valves has no sub-categories: all of its products are listed on this page.

Brands with products in thermostatic radiator valves include Invensys Drayton, Pegler Yorkshire and Own Brand, and each brand page linked on this page lists that maker's products at BHL.

Thermostatic Radiator Valves sits within Radiators & Accessories alongside Radiator Accessories, Manual Radiator Valves and other sub-categories.

Thermostatic Radiator Valves FAQs

What does the Thermostatic Radiator Valves range at BHL include?

Products from the brands linked on this page.

Which brands appear in thermostatic radiator valves at BHL?

Brands with products here include Invensys Drayton, Pegler Yorkshire and Own Brand. Each name links to the brand's own page.

How do I find a specific thermostatic radiator valves product?

Narrow the list first: the brand pages linked on this page each hold a smaller set of thermostatic radiator valves products, one manufacturer's.

Related categories

More brands in thermostatic radiator valves: Supaplumb.

Back to Radiators & Accessories, or continue to Radiator Accessories and Manual Radiator Valves.