Description
This is a compact thermostatic radiator valve (TRV) pack intended for corner pipework runs where a contemporary black finish is required. It pairs a liquid‑filled thermostatic head with an angled, reversible valve body and a matching corner lockshield so you get both temperature control and a neat, coordinated look on designer radiators and towel rails.
The head uses a sealed liquid sensor to open or close the valve according to the room temperature setting. The control has a smooth, graduated scale that maps roughly to 7°C–28°C (factory markings put position 3 near 20°C) and includes a frost‑protection position beneath the lowest number. The pack is built around a brass valve body finished in hard‑wearing black powder coat to suit modern radiators where a black trim is desired rather than chrome or nickel.
Key specifications
- Operating range: 7°C to 28°C (frost protection below 7°C)
- Connects to 15mm pipework; standard 1/2″ BSP tails
- Material: brass valve body with black powder‑coat finish
- Maximum working pressure: 10 bar; maximum flow temperature: 110°C
- Includes: thermostatic head (liquid sensor), reversible/angled TRV body, matching corner lockshield, decorator caps, two 1/2″ BSP tails and 15mm olives
How it controls temperature and what the settings mean
The TRV head contains a liquid element that expands or contracts as room temperature changes. Turn the head to a higher number and the valve allows more hot water into the radiator; set it low and the valve closes down. The printed scale commonly used on this style corresponds approximately to a set of target temperatures (the producer’s markings place position 3 at about 20°C). The lowest position acts as a frost‑protection stop so the valve will admit heat if the ambient drops very low, protecting pipework and the radiator from freezing.
Installation and compatibility
This is a corner/angled pack designed for 15mm domestic central‑heating pipework and connects on standard 1/2″ BSP tails. The valve body is reversible so it can be fitted on either the flow or return, and the head can be mounted horizontally or vertically to suit the geometry of towel rails and radiators. The pack is supplied with the usual olives and tails needed for installation and decorator caps to seal the valve when a radiator is removed for decorating.
Practical point: some merchant listings and the technical sheet note the pack fits 10–15mm runs (reducers are sometimes required for 10mm copper). If your installation uses 10mm pipework, double‑check whether you need a small reducer or the separate 10mm kit that some suppliers sell with these parts.
Advantages and sensible uses
This pack is a good choice when you want a discreet black finish to match contemporary radiators or black plumbing trims, and you need a corner valve solution rather than inline (straight) valves. It provides the basic advantages of mechanical TRVs: simple, wholly automatic local temperature regulation without electronics, energy savings by preventing overheating, and integrated frost protection. The included lockshield lets installers balance the radiator circuit after fitting.
Limitations and practical cautions
As a mechanical, liquid‑sensor TRV it gives predictable, maintenance‑free control in typical domestic systems but lacks the programmability, remote control or fine scheduling of electronic thermostats. It is not a primary shut‑off — installers should use it for temperature control, with isolating valves provided elsewhere if full shut‑off is required. Also confirm pipe size compatibility for 10mm systems before purchase: the standard pack is set up for 15mm pipe with 1/2″ tails.
Finally, like all TRVs, it should not be fitted on a radiator in the same room as the room thermostat if used on the same heating circuit, otherwise the two controls can fight each other. Positioning the TRV so it senses ambient room air rather than direct heat from the radiator surface will give the most accurate control.
Overall, this corner TRV pack is a straightforward, attractively finished option for domestic projects where a black aesthetic is wanted and a simple, reliable thermostatic control is needed for a radiator or towel rail with corner pipe entry.
