This Drayton TRV4 Chrome Thermostatic Radiator Valve with Manual Valve is the perfect addition to your heating system. With a sleek chrome finish and a rotary knob control style, this valve allows you to easily adjust the heat settings with five or more options. The valve is made of sturdy steel material and is designed for both horizontal and vertical radiator orientation. This TRV4 model is compatible with boilers and has a manual feature for added convenience. The item height is 15mm and it comes with a manufacturer warranty of 1 month. The valve is a unit type item and is designed for radiators. It is a Central Heating Radiator Valve that is perfect for your home, furniture and DIY needs. Never opened