The GENBRA 15mm Double Check Valve (Item No. BFDCV-15) is a durable brass compression fitting designed for use in hot and cold water systems. Featuring WRAS approval and corrosion-resistant DZR brass, this valve includes a screwdriver slot for shut-off and is supplied with a pre-loaded olive in the compression nut for quick and secure installation. Ideal for preventing backflow in domestic and commercial plumbing systems.