2 1/2", 3", 4", 6"
This is a double check detector assembly. Production was discontinued in 1995. It utilizes an assembly similar to the 550 on the main valve. The by-pass assembly is a 3/4" Wilkins 550A.
Common repair parts are a very small subset of the 10,000 plus items BAVCO stocks.
Please feel free to contact us direct at 800-458-3492 for pricing on items not listed
or backflow prevention devices.