Description
This is a basic thermostatic radiator valve and lockshield pair supplied as a single pack in white (thermostatic head) with chrome-plated valve bodies. It combines a white liquid‑sensor thermostatic head and a complementary manual lockshield body so an individual radiator can be temperature‑controlled while the opposite valve is used for balancing. The set is aimed at straightforward domestic radiator installations or simple replacements where reliable, individual room temperature control is required without high cost or specialist fittings.
The thermostatic element automatically reduces flow into a radiator as the ambient room temperature reaches the chosen setting, so each room can be kept at its own comfortable level and boiler runtime is reduced. The pack is designed to be versatile: the TRV body is reversible for flow or return and the head can be mounted vertically or horizontally, while a reducer is supplied to allow use on smaller 10 mm pipework as well as 15 mm.
What you get and how it works
The pack contains a TRV (thermostatic radiator valve) with a white thermostatic head (model TRV2) and a manual lockshield valve (model LS1). The head uses a liquid sensor and has a graduated scale with settings that approximately correspond to room temperatures between about 7°C (frost protection) and 28°C. The TRV senses air temperature and modulates the valve spindle; as the room warms it progressively closes to reduce the radiator flow, and it re‑opens when the room cools.
- Pack includes TRV body with white head, LS1 lockshield body, 1/2″ BSP radiator tail(s) and a 10 mm reducer kit.
- TRV head is reversible for horizontal or vertical mounting and the valve body is reversible for fitting on flow or return piping.
- Designed for 15 mm compression connections but supplied with a reducer for 10 mm pipework.
Key specifications
- Temperature range (head): approximately 7°C to 28°C (0 = isolation, 1 ≈ 7°C, 5 ≈ 28°C)
- Valve tail / radiator connection: 1/2″ BSP
- Pipework compatibility: 10–15 mm (reducer supplied for 10 mm)
- Maximum working pressure: 10 bar
- Maximum water flow temperature (TRV body): 110°C; LS1 lockshield rated to 90°C
- Sensor type: liquid (built into head)
- Pack code: TRVPACK (White)
Installation and compatibility notes
The pack is built for straightforward fitting to modern radiators: it uses a standard 1/2″ BSP tailpiece for the radiator connection and 15 mm compression fittings for the pipework, with a small reducer to accept 10 mm pipe. That makes it a convenient choice where installers want the flexibility to work with either 10 mm or 15 mm copper or similar supply pipes without changing the radiator’s tailpiece.
Because the valve bodies are reversible, you won’t need separate flow‑ and return‑specific parts; the TRV can be fitted on either side of the radiator and the head adjusted to suit either vertical or horizontal mounting. The TRV head’s markings are approximate temperatures rather than precise degree settings; they are useful for setting and repeating a comfortable room level but should not be relied on for thermostat‑grade accuracy.
Performance and practical considerations
The liquid sensor in the head gives a reasonably quick and stable response to room temperature compared with older wax or air‑filled heads. The datasheet lists a small hysteresis (about 0.2 K) and a modest differential‑pressure effect; in practice the valve will work well on typical domestic systems but large pressure spikes or a very high differential pressure across the valve can reduce regulation accuracy. The TRV has an isolation/frost setting so the radiator can be left at a low maintenance temperature during absence.
Two points to bear in mind: the TRV body and the LS1 lockshield have different maximum flow‑temperature ratings (the TRV is rated up to 110°C while the LS1 is listed at 90°C). Both are suitable for normal domestic central‑heating systems; however, if you operate at unusually high temperatures check that the whole installation is within limits. The pack is not a programmable or smart TRV solution — it is a mechanical thermostatic head and is intended as a low‑cost, reliable way to control individual radiators.
Who this suits
This is a practical choice for plumbers, landlords and homeowners who need an inexpensive, no‑frills TRV/lockshield pair for either new radiator installs or like‑for‑like replacements. It’s particularly useful when you need to cover both 10 mm and 15 mm systems without ordering separate valves. It’s not aimed at customers seeking remote or app‑based control; for that you would look for motorised or smart heads that explicitly match the valve body’s connection type.
Overall, the pack offers sensible materials and a simple feature set — chrome‑plated valve bodies with a white thermostatic head and a compact parts list — making it a convenient, trade‑friendly product for routine central‑heating work.
