We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

3G Electric
⌕
RFQ CartGet a QuoteSign inSign up
Watts Backflow Preventer Repair Kits: Second Check Kit, 6AUW2 - Repair Kits & Parts for Watts Backflow Preventers
WattsRepair Kits & Parts for Watts Backflow Preventers

Watts Backflow Preventer Repair Kits: Second Check Kit, 6AUW2

The WATTS Backflow Preventer Repair Kits: Second Check Kit (SKU 844GH3) is a repair kit for Watts backflow preventers, including a Second Check Module. It is compatible with a 6-inch valve size and the Series…

SKU 3G-OTH-436793

Brand
Watts
Item
Backflow Preventer Repair Kits: Second Check Kit, 6AUW2
Category
Repair Kits & Parts for Watts Backflow Preventers
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

Watts
Manufacturer Part Number
RK 757/757DCDA-CK2 6
Type
6AUW2
Includes
Second Check Module
Compatible Valve Size
6 in
Compatible with Series
757DCDA
Compatible with Mfr. Model No.
757DCDA
Compatible with Grainger Part No.
6AUW2
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The WATTS Backflow Preventer Repair Kits: Second Check Kit (SKU 844GH3) is a repair kit for Watts backflow preventers, including a Second Check Module. It is compatible with a 6-inch valve size and the Series 757DCDA, with manufacturer part number RK 757/757DCDA-CK2 6. This kit is designed for use with Grainger Part No. 6AUW2 and Mfr. Model No. 757DCDA.

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.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
WATTS Backflow Preventer Repair Kits: Second Check Kit, 6AUW3, 8 in Compatible Valve Size (MPN RK 757/757DCDA-CK2 8). Key specifications — Compatible Valve Size: 8 in; Compatible with Grainger Part No.: 6AUW3; Compatible with Series: RK-757; Compatible with Mfr. Model No.: 757DCDA; Includes: Second Check Module.
Watts
WATTS Backflow Preventer Repair Kits: Second Check Kit, 6AUW3, 8 in Compatible Valve Size (MPN RK 757/757DCDA-CK2 8). Key specifications — Compatible Valve Size: 8 in; Compatible with Grainger Part No.: 6AUW3; Compatible with Series: RK-757; Compatible with Mfr. Model No.: 757DCDA; Includes: Second Check Module.
WATTS Backflow Preventer Repair Kits: Second Check Kit, 6AUW5, 6 in Compatible Valve Size (MPN RK 957/957RPDA-CK2 6). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 6AUW5; Compatible with Series: LF957RPDA; Compatible with Mfr. Model No.: 957RPDA; Includes: Second Check Module.
Watts
WATTS Backflow Preventer Repair Kits: Second Check Kit, 6AUW5, 6 in Compatible Valve Size (MPN RK 957/957RPDA-CK2 6). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 6AUW5; Compatible with Series: LF957RPDA; Compatible with Mfr. Model No.: 957RPDA; Includes: Second Check Module.
WATTS Backflow Preventer Repair Kits: First Check Kit, 6AUW2, 6 in Compatible Valve Size, Repair Kit (MPN RK 757/757DCDA-CK1 6). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 6AUW2; Compatible with Series: 757; Compatible with Mfr. Model No.: 757; Includes: Check Module O-Ring.
Watts
WATTS Backflow Preventer Repair Kits: First Check Kit, 6AUW2, 6 in Compatible Valve Size, Repair Kit (MPN RK 757/757DCDA-CK1 6). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 6AUW2; Compatible with Series: 757; Compatible with Mfr. Model No.: 757; Includes: Check Module O-Ring.
WATTS Backflow Preventer Repair Kits: First Check Kit, 6AUW5, 6 in Compatible Valve Size, Repair Kit (MPN RK 957/957RPDA-CK1 6). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 6AUW5; Compatible with Series: 957; Compatible with Mfr. Model No.: 757; Includes: Check Module O-Ring.
Watts
WATTS Backflow Preventer Repair Kits: First Check Kit, 6AUW5, 6 in Compatible Valve Size, Repair Kit (MPN RK 957/957RPDA-CK1 6). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 6AUW5; Compatible with Series: 957; Compatible with Mfr. Model No.: 757; Includes: Check Module 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.
Watts
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.
WATTS Backflow Preventer Repair Kits: First Check Kit, 6AUW3, 8 in Compatible Valve Size, Repair Kit (MPN RK 757/757DCDA-CK1 8). Key specifications — Compatible Valve Size: 8 in; Compatible with Grainger Part No.: 6AUW3; Compatible with Series: 757; Compatible with Mfr. Model No.: 757DCDA; Includes: Red Silicone Disc Elastomer.
Watts
WATTS Backflow Preventer Repair Kits: First Check Kit, 6AUW3, 8 in Compatible Valve Size, Repair Kit (MPN RK 757/757DCDA-CK1 8). Key specifications — Compatible Valve Size: 8 in; Compatible with Grainger Part No.: 6AUW3; Compatible with Series: 757; Compatible with Mfr. Model No.: 757DCDA; Includes: Red Silicone Disc Elastomer.

More from Watts

View all Watts parts →
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
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
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
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
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
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
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
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
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.