The Onyx 15mm x 1/2″ Angled White TRV & Lockshield Twin Pack is a set of valves designed for use with radiators in a central heating system.

Thermostatic Radiator Valve (TRV): A TRV is used to regulate the temperature of individual radiators. It automatically adjusts the flow of hot water into the radiator based on the room temperature, helping to maintain a comfortable and consistent temperature and improve energy efficiency.

Lockshield Valve: A lockshield valve is a type of manual valve and is used to balance the radiator by controlling the amount of water flowing out of it. This ensures that each radiator in the system heats up evenly. Once set, it is typically left in position and not adjusted frequently.

Twin Pack: A twin pack consists of a Thermostatic Radiator Valve (TRV) and a Lockshield Valve all in one box.

Size: The size 15mm x 1/2″ indicates the pipe connection size. The 15mm refers to the pipe diameter that the valve will fit, and the 1/2″ refers to the threading on the radiator side.

Angled: The “angled” description indicates the shape of the valve, which means it is designed to connect to the radiator at an angle, making it suitable for certain radiator installations where space or pipe layout requires an angled connection.

Energy Efficiency: By using a TRV, you can better control the temperature in different rooms, reducing energy wastage and potentially lowering heating bills.

Comfort: Helps maintain a consistent and comfortable room temperature.

Aesthetics: The white finish and angled design provide a clean and modern look, blending well with most radiators and room designs.

This twin pack provides both essential valves needed for controlling and balancing the radiator, making it a convenient solution for those upgrading or installing a central heating system.