Stopvalves, gate valves and plugcocks make up the Yorkshire valves range, which suits both domestic and industrial requirements, from central heating and hot and cold water services to oil lines. Valves are assembled using the same jointing procedure as the Yorkshire integral solder ring fittings. Yorkshire valves are guaranteed for 25 years against manufacturing defects and are WRAS approved. Gunmetal Stopvalve, copper x copper. The body and all parts that are in contact with water are made from gunmetal.