2 1/2", 3", 4", 6", 8", 10"
Both models are a two check pressure vacuum breaker. Production of the Model 27 was from approximately 1975-1990. The Model 27-4 began in 1991 and was discontinued in 2001. The Model 27 consists of a Model D or the DEX double check assembly with a spring loaded air inlet installed on the downside of the #2 check. The serial number is needed to order some repair parts. The Model 27-4 consists of a Model D-4 double check assembly with a spring loaded air inlet installed on the downside of the #2 check.
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.