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Watts RK957/957RPDA-CK2-21/2-4 Second Check Module Repair Kit - Repair Kits & Parts for Watts Backflow Preventers
WattsRepair Kits & Parts for Watts Backflow Preventers

Watts RK957/957RPDA-CK2-21/2-4 Second Check Module Repair Kit

The WATTS Backflow Preventer Repair Kits: Second Check Kit is a repair kit for Watts backflow preventers, including a second check module. It is compatible with valve sizes 2-1/2 in to 4 in and is designed for use…

SKU 3G-OTH-436716

Also listed as: RK957957RPDACK22124 · RK957 957RPDA CK2 21 2 4 · RK957-957RPDA-CK2-21-2-4

Brand
Watts
Item
RK957/957RPDA-CK2-21/2-4 Second Check Module Repair Kit
Part Number
RK957/957RPDA-CK2-21/2-4
Category
Repair Kits & Parts for Watts Backflow Preventers
Available to Order
Also known as:RK957/957RPDA-CK2-21/2-4Watts
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Technical Specifications

Watts
Manufacturer Part Number
RK957/957RPDA-CK2-21/2-4
Type
1RCX3/1RCX5/1RCX7, 957/957RPDA, Repair Kit
Includes
Second Check Module
Compatible Valve Size
2-1/2 in to 4 in
Compatible with Series
RK-957
Compatible with Mfr. Model No.
957

Technical Documents

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3G Electric (S) Pte. Ltd. — Singapore

Product Description

The WATTS Backflow Preventer Repair Kits: Second Check Kit is a repair kit for Watts backflow preventers, including a second check module. It is compatible with valve sizes 2-1/2 in to 4 in and is designed for use with Series RK-957 and manufacturer model number 957. The kit's manufacturer part number is RK957/957RPDA-CK2-21/2-4.

Frequently Asked Questions

What is the Watts backflow preventer second check kit used for?

The Watts second check kit is a repair component for backflow preventers, specifically the second check module. It is used to restore proper check-valve function in commercial water systems, preventing reverse flow contamination. This kit fits Watts Series 957 and 957RPDA models with valve sizes 2-1/2 in to 4 in.

What are the specifications of the Watts RK957/957RPDA-CK2-21/2-4 repair kit?

This Watts repair kit includes a second check module and is compatible with valve sizes 2-1/2 in to 4 in. It is designed for Series RK-957 and manufacturer model number 957. The manufacturer part number is RK957/957RPDA-CK2-21/2-4, and it is also compatible with part number 957-OSY 21/2.

Where to buy Watts backflow preventer repair kits worldwide?

3G Electric supplies Watts backflow preventer repair kits, including the RK957/957RPDA-CK2-21/2-4 second check kit, to customers worldwide. We handle full logistics, customs clearance, and delivery to your location. Contact us for pricing and lead time on this genuine Watts repair component.

How to install a Watts second check module repair kit?

Installation of a Watts second check module kit typically involves depressurizing the system, removing the old check assembly, and replacing it with the new module. Ensure the valve size matches 2-1/2 in to 4 in. Follow standard backflow preventer maintenance procedures and local plumbing codes. Always consult the manufacturer's instructions for your specific model.

Used in

Common applications for Watts
Commercial plumbing – Watts standard capacity water pressure regulators (3/8 LF 26AB) for stabilizing incoming water pressure
Industrial steam systems – Watts 152A series steam pressure regulators for pressure reduction in process and heating lines
Cross-connection control – Watts 757 double check backflow preventers for commercial and industrial water supply protection
Boiler safety – Watts ASME Section XIII temperature and pressure relief valves for overpressure protection in heating systems
Hydronic heating – Watts CP16 pilot-operated pressure regulators for maintaining consistent pressure in steam or water loops
Water hammer mitigation – Watts LF15M2-A water hammer arrestors for absorbing surges in quick-closing valve applications
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Watts Products

3G Electric supplies Watts repair kits & parts for watts backflow preventers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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