Watts Model 957RPDA / LF957RPDA (N, Z) RPDA

957RPDAThe Watts 957RPDA is a reduced pressure detector assembly ( RPDA ).  It is available in 2 ½” – 10” sizes and has been in production since 2002.  The body is made of stainless steel.  It currently utilizes the ¾” 919 for the bypass assembly.  A lead free version ( LF957RPDA ) was introduced in 2013.

Parts Breakdown

PDF  Series 957RPDA / LF957RPDA Parts Breakdown

Repair Procedures


Repair Video



2 1/2″ – 6″ 957RPDA Repair Video

8″ – 10″ 957RPDA Repair Video

Repair Guys Article


Spec Sheet

PDF  Series 957RPDA – Spec Sheet

pdfSeries LF957RPDA – Spec Sheet



Category: Watts
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