990 / 992

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Watts rpz 990 is a reduced pressure assembly. The Watts 990 Backflow Preventer was discontinued in 1997. The checks are made of ductile iron with fused epoxy coating. The check is a toggle linkage mechanism. The check springs are contained. The spring tension must be released to repair the assembly. The bronze check seats are replaceable but a seat removal tool is needed. Vulcanized clapper plates are used to seal the checks. The relief valve body bronze and is attached to the check body by a threaded pipe connection. The relief seat is replaceable. An external relief valve sensing line is used. The shutoffs on the 992 had flange dimensions different than a standard sized shutoff.

This series is currently Obsolete!

 

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