This is a double check detector assembly. Production was between 1998 and 1999. The assembly utilizes the 773 design on the main valve. The bypass utilizes either the Model 007M2 or 007M3. Check the name tag on the bypass unit to confirm which you have.
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.