Backflow Reference Manual - Ames

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1/2", 3/4", 1", 1 1/4", 1 1/2", 2"


This is a reduced pressure assembly. Production began in 2003 and was discontinued in 2013. The Ames 400B is the same as the Watts model 919. The body is made of bronze. The checks are a poppet design. Check covers unscrew from the top of the body. The check springs are not contained when the cover is removed. The relief valve utilizes an internal relief valve sensing line. There will be tension from the relief valve spring as you remove the cover. For repair information see Watts 919.


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.