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Watts Backflow Preventer Repair Kits: First Check Kit - Repair Kits & Parts for Watts Backflow Preventers
WattsRepair Kits & Parts for Watts Backflow Preventers

Watts Backflow Preventer Repair Kits: First Check Kit

The WATTS Backflow Preventer Repair Kits: First Check Kit is a repair kit for Watts backflow preventers, compatible with Series RK-774 and Mfr. Model No. 774. It includes a Cam Check with a Check O-Ring and is…

SKU 3G-OTH-436758

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

Watts
Manufacturer Part Number
RK774/774DCDA-CK1-21/2-4
Type
36JC71/36JC72/36JC73/36JC78/36JC79/36JC80
Includes
Cam Check with a Check O-Ring
Compatible Valve Size
2-1/2 in to 4 in
Compatible with Series
RK-774
Compatible with Mfr. Model No.
774
Compatible with Grainger Part No.
36JC80
View Full Spec Sheet

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

Product Description

The WATTS Backflow Preventer Repair Kits: First Check Kit is a repair kit for Watts backflow preventers, compatible with Series RK-774 and Mfr. Model No. 774. It includes a Cam Check with a Check O-Ring and is designed for compatible valve sizes of 2-1/2 in to 4 in. The manufacturer part number is RK774/774DCDA-CK1-21/2-4.

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: Second Check Kit, 36JC71/36JC72/36JC73/36JC78/36JC79/36JC80 (MPN RK774/774DCDA-CK2-21/2-4). Key specifications — Compatible Valve Size: 2-1/2 in to 4 in; Compatible with Grainger Part No.: 36JC71; Compatible with Series: RK-774; Compatible with Mfr. Model No.: 774; Includes: (2) Cam Check with Check O-Rings.
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WATTS Backflow Preventer Repair Kits: First Check Kit, 36JC74/36JC81, 6 in Compatible Valve Size (MPN RK 774/774DCDA-CK1 6). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 36JC81; Compatible with Series: 774DCDA; Compatible with Mfr. Model No.: 774DCDA; Includes: Cam Check with a Check O-Ring.
WATTS Backflow Preventer Repair Kits: Second Check Kit, 36JC74/36JC81, 6 in Compatible Valve Size (MPN RK 774/774DCDA-CK2 6). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 36JC81; Compatible with Series: 774DCDA; Compatible with Mfr. Model No.: 774; Includes: (2) Cam Check with Check O-Rings.
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WATTS Backflow Preventer Repair Kits: Second Check Kit, 36JC74/36JC81, 6 in Compatible Valve Size (MPN RK 774/774DCDA-CK2 6). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 36JC81; Compatible with Series: 774DCDA; Compatible with Mfr. Model No.: 774; Includes: (2) Cam Check with Check O-Rings.
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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.
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