Features and Benefits: Traditional corner thermostatic radiator valve pair Manufactured from high-quality material and is extremely durable for long-term use Solid brass construction Comes in attractive Polished Copper finish Compression Inlet(s) 15mm Frost protection feature for reliability Radiator Coupler 1/2" BSPT - Male One wheel head and one lockshield Top grade brass valve with a real wood head The traditional wooden handles definitely set the vintage feel of the valves TRV's are installed on the flow rather than the return pipework of a radiator Used in conjunction with a system automatic bypass valve This thermostatic valve can be installed on either the flow or return in any orientation System automatic bypass valves are a specific building regulation requirement for all new installations and boiler upgrades All bi-directional TRV's from any manufacturer require the bypass valve to function correctly and thus avoid radiator hammer Important Information: Supplied with 6 year