Atmospheric vacuum breaker prevents the backflow of irrigation system water into the household supply. Manual flow control and manual bleed. Full size waterway for low pressure loss. Operating pressure: 25 to 150 psi (pounds per square inch). Red brass construction.
CHAMPION IRRIGATION PD 466P-075Y Brass Anti-Siphon
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Full Printed Catalog (PDF) - Ewing Irrigation
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Princess Auto Catalogue #201 - Fall & Winter 1992 by Princess Auto