Backflow Reference Manual - Flomatic

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


This is a reduced pressure assembly. Production began in 1993 The division that produced backflow preventers was purchased by Watts Regulator in 2011. Production of these assemblies was discontinued in 2013. The 1/2"-2" body is made of bronze and the 2 1/2"- 10" size is a ductile iron body that is fused epoxy coated. There is a single cover on the top. The checks are modular in design. Check modules are held in the body with spring clips. There is tension from the relief valve spring when the cover is removed. All seats are replaceable. In 1996 the model RPZII was introduced in 1/2" and 3/4" sizes. In 2000 the 1 1/4" RPZ and 1 1/2" RPZII were introduced. The RPZII is smaller in size than the RPZ model but is similar in construction. In 2002 the model RPZE and RPZEII was introduced in sizes 3/4"-2". This model is similar to the RPZ and RPZII except the body is made of an unleaded bronze alloy. Most repair parts are the same.


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.