Description Manufactured from DZR brass the WRAS approved Floguard single check valve is used for the prevention of back-flow and back syphonage contamination risks in accordance with the Water Supply (water fitting) Regulations 1999. A single check valve protects against the risk of backflow and back siphonage contaminations Compact, lightweight solution ideal for all class 2 contamination risks are per water supply (water fittings) Regulations 1999 Allows high flow rate with minimum pressure drop, giving good flow rates through the single check valve