Watts Model 909 / LF909 (M1) RP

909The Watts 909 is a reduced pressure assembly (RPA).  It is available in 2 ½” – 10” and has been in production since 1979.  The body is made of cast iron with a fused epoxy coating.  In 1989 the 909M1 was introduced in 4” – 10” sizes.  The relief valve housing was changed from bronze to cast iron with a fused epoxy coating.  On the 8” & 10” 909M1 the relief valve internal components were downsized to use 4”-6” relief valve parts.  A lead free version was introduced in 2010 (909LF).

Parts Breakdown

PDF    Series 909 / LF909 (M1) Parts Breakdown


Repair Procedures

PDF Series 909 / LF909 (M1) Repair Procedures

Repair Videos

2 1/2″ – 10″ 909 Repair Video

Repair Guy Article

Spec Sheet


Category: Watts
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