Wilkins 2 1/2"-4" 350AST/350ASTDA 2nd Check Seat Retainer
Details
Details
Wilkins: 3509ST-140 - 2 1/2"-4" 350AST/350ASTDA 2nd Check Seat Retainer
(Two are required for one backflow assembly)
Manufacturer: Wilkins
Size: 2 1/2 Inch, 3 Inch, 4 Inch
Product model: 350AST, 350ASTDA, 375AST, 375ASTDA
Size: 2 1/2 Inch, 3 Inch, 4 Inch
Product model: 350AST, 350ASTDA, 375AST, 375ASTDA
Installation and Maintenance Instructions 2 1/2" - 6" Specification Sheet Repair Parts Guide 
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