Watts RK 957/RPDA-CK2-RS RPZ Backflow Preventer

The Watts RK 957/RPDA-CK2-RS is a genuine second check kit (red silicone) for 2 1/2" to 4" 957 / 957RPDA reduced pressure zone (RPZ) backflow preventers. It features a silicone seat.

This 2 1/2 to 4 inch check assembly red silicone disc kit includes the parts necessary to repair or replace the second check of series 957, reduced pressure zone assembly, or reduced pressure detector assembly, series 957RPDA This kit consists of all parts necessary to repair the second check assembly of the applicable valve. All parts are genuine and original to the valve.

Features

• Factory replacement kit
• No special tools required for changing parts
• All parts are made of high quality materials
• Original parts insure long service life

Common Questions

Will this kit fit my valve?

The RK 957/RPDA-CK2-RS fits 2 1/2", 3" and 4" sizes of Watts series 957 / 957RPDA. Kits are size- and series-specific, so match the model stamped on your valve body or cover before ordering.

What's included in this kit?

This is a second check kit (red silicone) — it carries the factory parts for that subassembly only, not a whole-valve rebuild. See the Watts spec sheet for the exact part breakdown.

Are these genuine Watts parts?

Yes. This is the factory RK 957/RPDA-CK2-RS kit built with genuine Watts OEM components. Aftermarket parts can void your assembly approval and are commonly rejected by inspectors at annual test time.

Which kit do I need if my relief valve failed the test?

Not this one — this kit services the check valve. A failed relief valve needs the RV (rubber parts) or VT (total relief valve) kit for 957 / 957RPDA in your size; a total repair (T) kit covers the relief valve and both checks.

Specifications

• Type: RPZ
• Seat / Seal Material: Silicone
• Country of Origin: United States
• Warranty: 1 Year Limited
• MPN: RK 957/RPDA-CK2-RS
• Lead-Free: No
• Product Role: repair_kit
• Kit Type: Second Check Kit (Red Silicone)
• Fits Brand: Watts
• Fits Valve Series: 957;957RPDA
• Fits Valve Size: 2 1/2";3";4"
• Used With: 2 1/2" 957;2 1/2" 957RPDA;3" 957;3" 957RPDA;4" 957;4" 957RPDA
• Watts Ordering Code: 0889371
• Genuine OEM Parts: Yes