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Watts Backflow Preventer Repair Kits: Second Check Kit, 36JC74/36JC81 - Repair Kits & Parts for Watts Backflow Preventers
WattsRepair Kits & Parts for Watts Backflow Preventers

Watts Backflow Preventer Repair Kits: Second Check Kit, 36JC74/36JC81

The WATTS Backflow Preventer Repair Kits: Second Check Kit (SKU 3G-OTH-436868) is a repair kit for Watts backflow preventers, compatible with Series 774DCDA and Mfr. Model No. 774. It includes (2) Cam Check with…

SKU 3G-OTH-436868

Also listed as: RK774774DCDACK26 · RK 774 774DCDA CK2 6 · RK-774-774DCDA-CK2-6

Brand
Watts
Item
Backflow Preventer Repair Kits: Second Check Kit, 36JC74/36JC81
Category
Repair Kits & Parts for Watts Backflow Preventers
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Watts
Manufacturer Part Number
RK 774/774DCDA-CK2 6
Type
36JC74/36JC81
Includes
(2) Cam Check with Check O-Rings
Compatible Valve Size
6 in
Compatible with Series
774DCDA
Compatible with Mfr. Model No.
774

Technical Documents

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

Product Description

The WATTS Backflow Preventer Repair Kits: Second Check Kit (SKU 3G-OTH-436868) is a repair kit for Watts backflow preventers, compatible with Series 774DCDA and Mfr. Model No. 774. It includes (2) Cam Check with Check O-Rings and is designed for a 6 in compatible valve size, with manufacturer part number RK 774/774DCDA-CK2 6.

Frequently Asked Questions

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

The Watts backflow preventer second check kit is used to repair the second check valve assembly in Watts Series 774DCDA and Model 774 backflow preventers. It is essential for maintaining backflow protection in commercial water systems, ensuring potable water is not contaminated by reverse flow.

What are the specifications of the Watts RK 774/774DCDA-CK2 6 repair kit?

The Watts RK 774/774DCDA-CK2 6 repair kit is compatible with a 6-inch valve size and fits Watts Series 774DCDA and Model 774 backflow preventers. It includes two cam checks with check O-rings. The manufacturer part number is RK 774/774DCDA-CK2 6, and it is also compatible with part number 36JC81.

Where to buy Watts backflow preventer repair kits worldwide?

Watts backflow preventer repair kits, such as the RK 774/774DCDA-CK2 6, are available to order worldwide through 3G Electric. As a global industrial equipment distributor, 3G Electric handles full logistics, customs clearance, and delivery to your location, ensuring you receive genuine Watts components.

How to install a Watts backflow preventer second check kit?

To install a Watts second check kit, first depressurize the system and remove the access cover. Replace the existing second check assembly with the new cam checks and O-rings from the kit. Ensure proper alignment and secure all fasteners. Always follow the manufacturer's instructions and local plumbing codes for safe installation.

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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Compatible alternatives & equivalents

Cross-referenced by specification & description
WATTS Backflow Preventer Repair Kits: First Check Kit, 36JC74/36JC81, 6 in Compatible Valve Size (MPN RK 774/774DCDA-CK1 6)
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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)
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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)
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WATTS Backflow Preventer Repair Kits: Second Check Kit, 36JD28, 6 in Compatible Valve Size (MPN RK 994/994RPDA-CK2 6)
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WATTS Backflow Preventer Repair Kits: Second Check Kit, 36JD28, 6 in Compatible Valve Size (MPN RK 994/994RPDA-CK2 6)
WATTS Backflow Preventer Repair Kits: Second Check Kit, 6AUW2, 6 in Compatible Valve Size (MPN RK 757/757DCDA-CK2 6)
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WATTS Backflow Preventer Repair Kits: Second Check Kit, 6AUW2, 6 in Compatible Valve Size (MPN RK 757/757DCDA-CK2 6)

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