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WATTS Backflow Preventer Repair Kits: Second Check Kit - Repair Kits & Parts for Watts Backflow Preventers
WATTSRepair Kits & Parts for Watts Backflow Preventers

WATTS Backflow Preventer Repair Kits: Second Check Kit

SKU 3G-OTH-436850

Brand
WATTS
Item
Backflow Preventer Repair Kits: Second Check Kit
Category
Repair Kits & Parts for Watts Backflow Preventers
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Technical Specifications

WATTS
Includes
Spring and Cover O-Ring
Compatible Valve Size
2 in
Compatible with Series
RK-919
Manufacturer Part Number
RK 919-CK2 2
Compatible with Mfr. Model No.
LF919
Compatible with Grainger Part No.
809GD0
View Full Spec Sheet

Technical Documents

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WATTS Products
3G Electric (S) Pte. Ltd. — Singapore

Used in

Common applications for WATTS
Industrial burner gas safety systems — Watts HF2000 filters with GF-series seal kits maintain clean, regulated gas supply to burner pilot and main flame controls
Commercial heating and boiler installations — Modular filter assemblies support preventive maintenance and component replacement without full system shutdown
Process gas delivery pipelines — DN25 through DN125 filter bodies accommodate varying flow rates and inlet pressures across manufacturing and chemical processes
Gas pressure regulation benches — Multi-stage Watts filter platforms integrate with pressure reducers and safety shutoff valves in test and calibration environments
Equipment retrofit and upgrade projects — Available connection sizes and seal kits enable adaptation of newer Watts components into legacy gas control systems
Planned maintenance and spare-parts inventory — Filter seal kits allow facilities to stock consumables in advance, reducing downtime during scheduled gas system servicing

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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WATTS Vacuum Breaker Repair Kit: Pressure Vacuum Breaker Check Kit, 1/2 - 3/4 800M4, Repair Kit (MPN 800M4-1/2-3/4 1st Check Kit). Key specifications — Compatible Valve Size: 1/2 in to 3/4 in; Compatible with Grainger Part No.: 793HT8; Compatible with Series: 800M4; Compatible with Mfr. Model No.: 1/2 - 3/4 800M4; Includes: Bonnet O-Ring.
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WATTS Vacuum Breaker Repair Kit: Pressure Vacuum Breaker Check Kit, 1/2 - 3/4 800M4, Repair Kit (MPN 800M4-1/2-3/4 1st Check Kit). Key specifications — Compatible Valve Size: 1/2 in to 3/4 in; Compatible with Grainger Part No.: 793HT8; Compatible with Series: 800M4; Compatible with Mfr. Model No.: 1/2 - 3/4 800M4; Includes: Bonnet O-Ring.
WATTS Backflow Preventer Repair Kits: Second Check Kit, 1RCX3/1RCX5/1RCX7, 957/957RPDA, Repair Kit (MPN RK957/957RPDA-CK2-21/2-4). Key specifications — Compatible Valve Size: 2-1/2 in to 4 in; Compatible with Grainger Part No.: 1RCX3; Compatible with Series: RK-957; Compatible with Mfr. Model No.: 957; Includes: Second Check Module.
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WATTS Backflow Preventer Repair Kits: Second Check Kit, 1RCX3/1RCX5/1RCX7, 957/957RPDA, Repair Kit (MPN RK957/957RPDA-CK2-21/2-4). Key specifications — Compatible Valve Size: 2-1/2 in to 4 in; Compatible with Grainger Part No.: 1RCX3; Compatible with Series: RK-957; Compatible with Mfr. Model No.: 957; Includes: Second Check Module.
WATTS Backflow Preventer Repair Kit: Complete Rubber Parts Kit, 6A771, 009-M1-QTS, Repair Kit, 009 (MPN RK 009 RT 3/4 - 1). Key specifications — Compatible Valve Size: 3/4 in to 1 in; Compatible with Grainger Part No.: 6A771; Compatible with Series: 009; Compatible with Mfr. Model No.: 009-M1-QTS; Includes: (2) Disc Assembly.
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WATTS Backflow Preventer Repair Kit: Complete Rubber Parts Kit, 6A771, 009-M1-QTS, Repair Kit, 009 (MPN RK 009 RT 3/4 - 1). Key specifications — Compatible Valve Size: 3/4 in to 1 in; Compatible with Grainger Part No.: 6A771; Compatible with Series: 009; Compatible with Mfr. Model No.: 009-M1-QTS; Includes: (2) Disc Assembly.
WATTS Backflow Preventer Repair Kits: First or Second Check Kit, 36JC70, 2 in Compatible Valve Size (MPN RK 719-CK4 2). Key specifications — Compatible Valve Size: 2 in; Compatible with Grainger Part No.: 36JC70; Compatible with Series: RK-LF719; Compatible with Mfr. Model No.: LF719; Includes: Disc Holder.
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WATTS Backflow Preventer Repair Kits: First or Second Check Kit, 36JC70, 2 in Compatible Valve Size (MPN RK 719-CK4 2). Key specifications — Compatible Valve Size: 2 in; Compatible with Grainger Part No.: 36JC70; Compatible with Series: RK-LF719; Compatible with Mfr. Model No.: LF719; Includes: Disc Holder.
WATTS Backflow Preventer Repair Kits: Complete Rubber Parts Kit, 3/4 in Compatible Valve Size, 009M3 (MPN RK 009M3-RT 3/4). Key specifications — Compatible Valve Size: 3/4 in; Compatible with Grainger Part No.: 36JD17; Compatible with Series: RK-009; Compatible with Mfr. Model No.: 009M3; Includes: (2) Seat O-Rings.
WATTS
WATTS Backflow Preventer Repair Kits: Complete Rubber Parts Kit, 3/4 in Compatible Valve Size, 009M3 (MPN RK 009M3-RT 3/4). Key specifications — Compatible Valve Size: 3/4 in; Compatible with Grainger Part No.: 36JD17; Compatible with Series: RK-009; Compatible with Mfr. Model No.: 009M3; Includes: (2) Seat O-Rings.
WATTS Total Relief Kit: Total Relief Kit, 3/4 in/M2 Compatible Valve Size, 3/4 009M2/LF009M2, 009 (MPN 009 M2-3/4 Total Relief Kit). Key specifications — Compatible Valve Size: 3/4 in; Compatible with Series: 009; Compatible with Mfr. Model No.: 3/4 009M2/LF009M2; Includes: Seat.
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WATTS Total Relief Kit: Total Relief Kit, 3/4 in/M2 Compatible Valve Size, 3/4 009M2/LF009M2, 009 (MPN 009 M2-3/4 Total Relief Kit). Key specifications — Compatible Valve Size: 3/4 in; Compatible with Series: 009; Compatible with Mfr. Model No.: 3/4 009M2/LF009M2; Includes: Seat.
WATTS Relief Valve Repair Kit: Relief Valve Kit, 793PG4/793PG6/793PG7, 4-6 LF909, Repair Kit, 909 (MPN LFRK 909-RV 4-6). Key specifications — Compatible Valve Size: 4 in to 6 in; Compatible with Grainger Part No.: 793PG4; Compatible with Series: 909; Compatible with Mfr. Model No.: 4-6 LF909; Includes: RV Disc Assembly.
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WATTS Relief Valve Repair Kit: Relief Valve Kit, 793PG4/793PG6/793PG7, 4-6 LF909, Repair Kit, 909 (MPN LFRK 909-RV 4-6). Key specifications — Compatible Valve Size: 4 in to 6 in; Compatible with Grainger Part No.: 793PG4; Compatible with Series: 909; Compatible with Mfr. Model No.: 4-6 LF909; Includes: RV Disc Assembly.
WATTS Backflow Preventer Repair Kits: First or Second Check Kit, 36JC53/36JC54/36JC59/36JC60 (MPN LFRK 709-CK4 2-1/2-3). Key specifications — Compatible Valve Size: 2-1/2 in to 3 in; Compatible with Grainger Part No.: 36JC53; Compatible with Series: RK-LF709; Compatible with Mfr. Model No.: 709; Includes: Disc and Spring Assembly.
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WATTS Backflow Preventer Repair Kits: First or Second Check Kit, 36JC53/36JC54/36JC59/36JC60 (MPN LFRK 709-CK4 2-1/2-3). Key specifications — Compatible Valve Size: 2-1/2 in to 3 in; Compatible with Grainger Part No.: 36JC53; Compatible with Series: RK-LF709; Compatible with Mfr. Model No.: 709; Includes: Disc and Spring Assembly.