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Watts Backflow Preventer Repair Kits: Second Check Kit, 809GC6, 3/4 in Compatible Valve Size - Repair Kits & Parts for Watts Backflow Preventers

WattsRepair Kits & Parts for Watts Backflow Preventers

Watts Backflow Preventer Repair Kits: Second Check Kit, 809GC6, 3/4 in Compatible Valve Size

The WATTS Backflow Preventer Repair Kits: Second Check Kit (SKU 844GJ6, MPN RK 919-CK2-3/4) is a repair kit for Watts backflow preventers, including a check assembly. It is compatible with a 3/4 in valve size, the…

SKU 3G-OTH-436799

Brand

Watts

Item

Backflow Preventer Repair Kits: Second Check Kit, 809GC6, 3/4 in Compatible Valve Size

Category

Repair Kits & Parts for Watts Backflow Preventers

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Technical Specifications

Watts

Manufacturer Part Number

RK 919-CK2-3/4 

Type

809GC6, RK-919 

Includes

Check Assembly 

Compatible Valve Size

3/4 in 

Compatible with Series

RK-919 

Compatible with Mfr. Model No.

919

Compatible with Grainger Part No.

809GC6 

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Watts Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

The WATTS Backflow Preventer Repair Kits: Second Check Kit (SKU 844GJ6, MPN RK 919-CK2-3/4) is a repair kit for Watts backflow preventers, including a check assembly. It is compatible with a 3/4 in valve size, the RK-919 series, and manufacturer model number 919, as well as Grainger part number 809GC6.

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 Backflow Preventer Repair Kits: First Check Kit, 809GC6, 3/4 in Compatible Valve Size, RK-919 (MPN RK 919-CK1-3/4). Key specifications — Compatible Valve Size: 3/4 in; Compatible with Grainger Part No.: 809GC6; Compatible with Series: RK-919; Compatible with Mfr. Model No.: LF919; Includes: Check Assembly.

WATTS Backflow Preventer Repair Kits: First Check Kit, 809GC6, 3/4 in Compatible Valve Size, RK-919 (MPN RK 919-CK1-3/4). Key specifications — Compatible Valve Size: 3/4 in; Compatible with Grainger Part No.: 809GC6; Compatible with Series: RK-919; Compatible with Mfr. Model No.: LF919; Includes: Check Assembly.

WATTS Backflow Preventer Repair Kits: Second Check Kit, 809GC7, 1 in Compatible Valve Size, RK-919 (MPN RK 919-CK2 1). Key specifications — Compatible Valve Size: 1 in; Compatible with Grainger Part No.: 809GC7; Compatible with Series: RK-919; Compatible with Mfr. Model No.: 919; Includes: Check Assembly.

WATTS Backflow Preventer Repair Kits: Second Check Kit, 809GC7, 1 in Compatible Valve Size, RK-919 (MPN RK 919-CK2 1). Key specifications — Compatible Valve Size: 1 in; Compatible with Grainger Part No.: 809GC7; Compatible with Series: RK-919; Compatible with Mfr. Model No.: 919; Includes: Check Assembly.

WATTS Backflow Preventer Repair Kits: Second Check Kit, 809GD0, 2 in Compatible Valve Size, RK-919 (MPN RK 919-CK2 2). Key specifications — Compatible Valve Size: 2 in; Compatible with Grainger Part No.: 809GD0; Compatible with Series: RK-919; Compatible with Mfr. Model No.: LF919; Includes: Spring and Cover O-Ring.

WATTS Backflow Preventer Repair Kits: Second Check Kit, 809GD0, 2 in Compatible Valve Size, RK-919 (MPN RK 919-CK2 2). Key specifications — Compatible Valve Size: 2 in; Compatible with Grainger Part No.: 809GD0; Compatible with Series: RK-919; Compatible with Mfr. Model No.: LF919; Includes: Spring and Cover O-Ring.

WATTS Backflow Preventer Repair Kits: Second Check Kit, 809GC8/809GC9, 919/LF919, Repair Kit, RK-919 (MPN RK 919-CK2 1-1/4-1-1/2). Key specifications — Compatible Valve Size: 1-1/4 in to 1-1/2 in; Compatible with Grainger Part No.: 809GC9; Compatible with Series: RK-919; Compatible with Mfr. Model No.: LF919; Includes: Check Assembly.

WATTS Backflow Preventer Repair Kits: Second Check Kit, 809GC8/809GC9, 919/LF919, Repair Kit, RK-919 (MPN RK 919-CK2 1-1/4-1-1/2). Key specifications — Compatible Valve Size: 1-1/4 in to 1-1/2 in; Compatible with Grainger Part No.: 809GC9; Compatible with Series: RK-919; Compatible with Mfr. Model No.: LF919; Includes: Check Assembly.

WATTS Backflow Preventer Repair Kits: First Check Kit, 809GC8/809GC9, 919/LF919, Repair Kit, RK-919 (MPN RK 919-CK1 1-1/4-1-1/2). Key specifications — Compatible Valve Size: 1-1/4 in to 1-1/2 in; Compatible with Grainger Part No.: 809GC9; Compatible with Series: RK-919; Compatible with Mfr. Model No.: 919; Includes: Check Assembly.

WATTS Backflow Preventer Repair Kits: First Check Kit, 809GC8/809GC9, 919/LF919, Repair Kit, RK-919 (MPN RK 919-CK1 1-1/4-1-1/2). Key specifications — Compatible Valve Size: 1-1/4 in to 1-1/2 in; Compatible with Grainger Part No.: 809GC9; Compatible with Series: RK-919; Compatible with Mfr. Model No.: 919; Includes: Check Assembly.

WATTS Backflow Preventer Repair Kits: Second Check Kit, 5DMJ4/793HL8/818DD2, 009M2, Repair Kit (MPN RK 009M2-CK2 2). Key specifications — Compatible Valve Size: 2 in; Compatible with Grainger Part No.: 5DMJ4; Compatible with Series: RK-009; Compatible with Mfr. Model No.: 009M2; Includes: Check Assembly.

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WATTS Backflow Preventer Repair Kits: Second Check Kit, 1KYD7/1KYD9/1KYE2, 757/757DCDA, Repair Kit (MPN RK757/757DCDA-CK2-21/2-4). Key specifications — Compatible Valve Size: 2-1/2 in to 4 in; Compatible with Grainger Part No.: 1KYE2; Compatible with Series: 757DCDA; Compatible with Mfr. Model No.: 757DCDA; Includes: Second Check Module.

WATTS Backflow Preventer Repair Kits: Second Check Kit, 1KYD7/1KYD9/1KYE2, 757/757DCDA, Repair Kit (MPN RK757/757DCDA-CK2-21/2-4). Key specifications — Compatible Valve Size: 2-1/2 in to 4 in; Compatible with Grainger Part No.: 1KYE2; Compatible with Series: 757DCDA; Compatible with Mfr. Model No.: 757DCDA; Includes: Second Check Module.

WATTS Backflow Preventer Repair Kit: Backflow Preventer Repair Kit, 809GD0, 2 LF919-QT-S-FS, RK-919 (MPN RK 919-T 2). Key specifications — Compatible Valve Size: 2 in; Compatible with Grainger Part No.: 809GD0; Compatible with Series: RK-919; Compatible with Mfr. Model No.: 2 LF919-QT-S-FS; Includes: First Check Repair Kit.

WATTS Backflow Preventer Repair Kit: Backflow Preventer Repair Kit, 809GD0, 2 LF919-QT-S-FS, RK-919 (MPN RK 919-T 2). Key specifications — Compatible Valve Size: 2 in; Compatible with Grainger Part No.: 809GD0; Compatible with Series: RK-919; Compatible with Mfr. Model No.: 2 LF919-QT-S-FS; Includes: First Check Repair Kit.

WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 793PG7, 6 in Compatible Valve Size (MPN 909 6 1st Check Kit). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 793PG7; Compatible with Series: RK-909; Compatible with Mfr. Model No.: 6 LF909; Includes: Lubricant.

WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 793PG7, 6 in Compatible Valve Size (MPN 909 6 1st Check Kit). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 793PG7; Compatible with Series: RK-909; Compatible with Mfr. Model No.: 6 LF909; Includes: Lubricant.

WATTS Second Check Valve Repair Kit: Second Check Valve Repair Kit, 6A769/812MY7/818DF4, Repair Kit (MPN 007 M1 1-1/2 - 2 2nd Check Kit). Key specifications — Compatible Valve Size: 1-1/2 in to 2 in; Compatible with Grainger Part No.: 6A769; Compatible with Series: 007; Compatible with Mfr. Model No.: 1-1/2 - 2 007M1/LF007M1; Includes: Disc Assembly.

WATTS Second Check Valve Repair Kit: Second Check Valve Repair Kit, 6A769/812MY7/818DF4, Repair Kit (MPN 007 M1 1-1/2 - 2 2nd Check Kit). Key specifications — Compatible Valve Size: 1-1/2 in to 2 in; Compatible with Grainger Part No.: 6A769; Compatible with Series: 007; Compatible with Mfr. Model No.: 1-1/2 - 2 007M1/LF007M1; Includes: Disc Assembly.

WATTS Backflow Preventer Repair Kits: First Check Kit, 36JD25/36JD26/36JD27/6AUW9, 994/994RPDA (MPN RK994/994RPDA-CK1-21/2-4). Key specifications — Compatible Valve Size: 2-1/2 in to 4 in; Compatible with Grainger Part No.: 36JD25; Compatible with Series: 994RPDA; Compatible with Mfr. Model No.: 994; Includes: Cam Arm.

WATTS Backflow Preventer Repair Kits: First Check Kit, 36JD25/36JD26/36JD27/6AUW9, 994/994RPDA (MPN RK994/994RPDA-CK1-21/2-4). Key specifications — Compatible Valve Size: 2-1/2 in to 4 in; Compatible with Grainger Part No.: 36JD25; Compatible with Series: 994RPDA; Compatible with Mfr. Model No.: 994; Includes: Cam Arm.

WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 793PG1/793PG2/793PG3/793PG5 (MPN 909 2-1/2 - 3 1st Check Kit). Key specifications — Compatible Valve Size: 2-1/2 in to 3 in; Compatible with Grainger Part No.: 793PG1; Compatible with Series: RK-LF909; Compatible with Mfr. Model No.: 2-1/2-3 LF909; Includes: Cover O-Ring.

WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 793PG1/793PG2/793PG3/793PG5 (MPN 909 2-1/2 - 3 1st Check Kit). Key specifications — Compatible Valve Size: 2-1/2 in to 3 in; Compatible with Grainger Part No.: 793PG1; Compatible with Series: RK-LF909; Compatible with Mfr. Model No.: 2-1/2-3 LF909; Includes: Cover O-Ring.

WATTS Backflow Preventer Repair Kits: First or Second Check Kit, 36JC58/36JC64, 709/LF709, RK-LF709 (MPN LFRK 709-CK4 10). Key specifications — Compatible Valve Size: 10 in; Compatible with Grainger Part No.: 36JC58; Compatible with Series: RK-LF709; Compatible with Mfr. Model No.: LF709; Includes: Disc and Spring Assembly.

WATTS Backflow Preventer Repair Kits: First or Second Check Kit, 36JC58/36JC64, 709/LF709, RK-LF709 (MPN LFRK 709-CK4 10). Key specifications — Compatible Valve Size: 10 in; Compatible with Grainger Part No.: 36JC58; Compatible with Series: RK-LF709; Compatible with Mfr. Model No.: LF709; Includes: Disc and Spring Assembly.

WATTS Backflow Preventer Repair Kits: Complete Rubber Parts Kit, 793HG1/793HG2/818DE6/818SE8, RK-007 (MPN RK 007M2-RT 1-1/4-1-1/2). Key specifications — Compatible Valve Size: 1-1/4 in to 1-1/2 in; Compatible with Grainger Part No.: 818SE8; Compatible with Series: RK-007; Compatible with Mfr. Model No.: 1-1/4 LF007M2; Includes: Cover O-Ring.

WATTS Backflow Preventer Repair Kits: Complete Rubber Parts Kit, 793HG1/793HG2/818DE6/818SE8, RK-007 (MPN RK 007M2-RT 1-1/4-1-1/2). Key specifications — Compatible Valve Size: 1-1/4 in to 1-1/2 in; Compatible with Grainger Part No.: 818SE8; Compatible with Series: RK-007; Compatible with Mfr. Model No.: 1-1/4 LF007M2; Includes: Cover O-Ring.