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Innovative thinking by Quarter Ball has moved the historically proven frostproof sillcock and wall hydrant into the modern age. Rugged ¼-turn ball valve construction has been combined with the frostproof layout. There are no compression washers and no ceramic discs – only a solid brass cartridge and chrome plated ball with custom valve seats tested to over 290,000 on/off cycles. The ball valve cartridge, patented by Quarter Ball, couples easy to use ¼-turn operation with heavy-duty components. These frostproof sillcocks are designed to stand up to the most demanding environments. Anti-siphon & anti-backflow design is fully approved in the United States & Canada: CSA B125.1-11/ASME A112.18.1-2011 ASSE 1019-A cUPC/IAPMO The water shutoff point of the frostproof sillcock needs to be in a heated area of the structure.