Backflow Reference Manual - Febco

Print this Page

805Y / 805YB / 805YD / 805YR


3/4", 1", 1 1/2", 2", 2 1/2", 3", 4", 6", 8", 10"


These models are double check assemblies. The 3/4"-2" 805Y began production in 1973 and was discontinued in 2003. The 3/4"-2" size 805Y is a wye pattern of bronze body construction with plastic poppet type check design. The check covers screw into the body and the check springs are not contained. Before 1994 the check seats were cast in the body and were not replaceable. In 1994 the 3/4"-1" had replaceable check seats available as an option. The replaceable check seat version is known as the model 805YR. A seat removal tool is needed to change the bronze seats. In 1995 the model 805YB was introduced to be used as a bypass assembly in certain models of Febco double check detector assemblies. Production of the 2 1/2"-10" 805Y series was approximately from 1973 to 1988. The 2 1/2"-10" 805Y is a painted epoxy coated cast iron check valve body. The internal check hardware on the 2 1/2"-3" was made of bronze while the 4"-10" was painted epoxy coated cast iron. The check seats are replaceable on the 2 1/2"-10" 805Y. A seat removal tool was needed to replace the seats. The 2 1/2"-3" have springs that are not contained. The 4"-10" size has contained springs. Some versions of the 4"-10" had to release the spring tension in order to change the rubber check discs. A spring removal tool was suggested to properly release the spring tension. The first few years the 805Y was produced with some internal parts constructed out of aluminum causing premature and serious erosion. These parts were redesigned to avoid this problem. The 805YD series was introduced approximately 1988 and was discontinued in 2013. It was produced in the 2 1/2"-10" sizes. In the 805YD the body material was changed to ductile iron. In 1991 a fused epoxy coating was added to replace the painted epoxy coating which was used up until that time. The check seats are bronze and replaceable. The seat design was changed so that no special tool was needed to replace the seat. The 2 1/2"-3" had springs that were not contained. The 4"-10" have contained springs. In the 805YD the internal check hardware was switched to stainless steel instead of the painted epoxy iron or bronze. Rubber repair kits for the same size unit are the same for the 805Y, 805YB, 805YD, and 805YR.


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.