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Watts Backflow Preventer Repair Kits: Second Check Kit, 36JD25/36JD26/36JD27/6AUW9 - Repair Kits & Parts for Watts Backflow Preventers
WattsRepair Kits & Parts for Watts Backflow Preventers

Watts Backflow Preventer Repair Kits: Second Check Kit, 36JD25/36JD26/36JD27/6AUW9

The WATTS Backflow Preventer Repair Kits: Second Check Kit is a repair kit for Watts backflow preventers, compatible with Series RK-994 and Mfr. Model No. 994RPDA. It includes a spring and is designed for compatible…

SKU 3G-OTH-436848

Brand
Watts
Item
Backflow Preventer Repair Kits: Second Check Kit, 36JD25/36JD26/36JD27/6AUW9
Category
Repair Kits & Parts for Watts Backflow Preventers
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Technical Specifications

Watts
Manufacturer Part Number
RK994/994RPDA-CK2-21/2-4
Type
36JD25/36JD26/36JD27/6AUW9, 994/994RPDA
Includes
Spring
Compatible Valve Size
2-1/2 in to 4 in
Compatible with Series
RK-994
Compatible with Mfr. Model No.
994RPDA
Compatible with Grainger Part No.
6AUW9
View Full Spec Sheet

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Watts Products
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, compatible with Series RK-994 and Mfr. Model No. 994RPDA. It includes a spring and is designed for compatible valve sizes of 2-1/2 in to 4 in. This kit is identified by manufacturer part number RK994/994RPDA-CK2-21/2-4 and Grainger Part No. 6AUW9.

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, 36JD29/36JD30, 994/994RPDA, Repair Kit (MPN RK 994/994RPDA-CK1 8-10). Key specifications — Compatible Valve Size: 8 in to 10 in; Compatible with Grainger Part No.: 36JD30; Compatible with Series: RK-994; Compatible with Mfr. Model No.: 994RPDA; Includes: Spring.
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WATTS Backflow Preventer Repair Kits: First Check Kit, 36JD29/36JD30, 994/994RPDA, Repair Kit (MPN RK 994/994RPDA-CK1 8-10). Key specifications — Compatible Valve Size: 8 in to 10 in; Compatible with Grainger Part No.: 36JD30; Compatible with Series: RK-994; Compatible with Mfr. Model No.: 994RPDA; Includes: Spring.
WATTS Backflow Preventer Repair Kits: Second Check Kit, 36JD29/36JD30, 994/994RPDA, Repair Kit (MPN RK 994/994RPDA-CK2 8-10). Key specifications — Compatible Valve Size: 8 in to 10 in; Compatible with Grainger Part No.: 36JD29; Compatible with Series: 994RPDA; Compatible with Mfr. Model No.: 994; Includes: Cam Arm.
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WATTS Backflow Preventer Repair Kits: Second Check Kit, 36JD29/36JD30, 994/994RPDA, Repair Kit (MPN RK 994/994RPDA-CK2 8-10). Key specifications — Compatible Valve Size: 8 in to 10 in; Compatible with Grainger Part No.: 36JD29; Compatible with Series: 994RPDA; Compatible with Mfr. Model No.: 994; Includes: Cam Arm.
WATTS Backflow Preventer Repair Kits: Second Check Kit, 36JD28, 6 in Compatible Valve Size (MPN RK 994/994RPDA-CK2 6). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 36JD28; Compatible with Series: 994; Compatible with Mfr. Model No.: 994; Includes: O-Ring Groove Seal.
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WATTS Backflow Preventer Repair Kits: Second Check Kit, 36JD28, 6 in Compatible Valve Size (MPN RK 994/994RPDA-CK2 6). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 36JD28; Compatible with Series: 994; Compatible with Mfr. Model No.: 994; Includes: O-Ring Groove Seal.
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WATTS Backflow Preventer Repair Kits: First Check Kit, 36JD28, 6 in Compatible Valve Size (MPN RK 994/994RPDA-CK1 6). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 36JD28; Compatible with Series: 994RPDA; Compatible with Mfr. Model No.: 994; Includes: Seat.
WATTS Backflow Preventer Repair Kits: Total Relief Valve Kit, 994/994RPDA, 994/994RPDA (MPN RK994/994RPDA-VT 21/2-10). Key specifications — Compatible Valve Size: 2-1/2 in to 10 in; Compatible with Grainger Part No.: 36JD26; Compatible with Series: 994RPDA; Compatible with Mfr. Model No.: 994RPDA; Includes: Sleeve.
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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.
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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.
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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.
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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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