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ApplicationFor installation on potable water lines to protect against both back siphonage and backpressure of polluted water into the potable water supply
Body Material304L Stainless Steel
Connection TypeGrooved
Dimensions34-7/8 " L
Domestic/ImportDomestic
IndustryPlumbing
Lead-FreeYes
Nominal Size4
Pressure Rating175
Temperature Rating140
Shipping Dimensions (L x W x H)21.5" x 35.25" x 21"
Short lay length for small space installation
Reliable performance and improved flow characteristics from patented compound check, allowing for installation in lower-pressure systems
Lower maintenance costs from corrosion-resistance of stainless body
The Zurn® Wilkins 350AST double check backflow preventer with stainless steel body provides low hazard protection with a corrosion-resistant and lightweight design.
Zurn® 4-350ASTBG Double Check Backflow Preventer, 4 in, Grooved, Lead-Free