Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
Watts Backflow Preventer Repair Kits: Second Check Kit, 809GC7, 1 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, 809GC7, 1 in Compatible Valve Size

The WATTS Backflow Preventer Repair Kits: Second Check Kit (SKU 844GJ7, MPN RK 919-CK2 1) is a repair kit for Watts backflow preventers. It includes a check assembly and is compatible with 1-inch valve sizes, Series…

SKU 3G-OTH-436733

Brand
Watts
Item
Backflow Preventer Repair Kits: Second Check Kit, 809GC7, 1 in Compatible Valve Size
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 919-CK2 1
Type
809GC7, RK-919
Includes
Check Assembly
Compatible Valve Size
1 in
Compatible with Series
RK-919
Compatible with Mfr. Model No.
919
Compatible with Grainger Part No.
809GC7
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 844GJ7, MPN RK 919-CK2 1) is a repair kit for Watts backflow preventers. It includes a check assembly and is compatible with 1-inch valve sizes, Series RK-919, and Model 919.

Frequently Asked Questions

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

The Watts second check kit is used to repair the second check valve assembly inside a Watts 919 series backflow preventer. It restores proper sealing and prevents reverse flow in commercial and residential water systems, ensuring compliance with backflow prevention codes.

What are the specifications of the Watts RK 919-CK2 1 repair kit?

The Watts RK 919-CK2 1 repair kit includes a check assembly and is compatible with 1-inch valve sizes. It fits Watts Series RK-919 and Model 919 backflow preventers. The manufacturer part number is RK 919-CK2 1, and it is compatible with Grainger part number 809GC7.

Where to buy Watts backflow preventer repair kits worldwide?

3G Electric supplies Watts backflow preventer repair kits worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us to source the RK 919-CK2 1 second check kit for your Watts 919 series backflow preventer.

How to install a Watts second check kit in a backflow preventer?

To install the Watts second check kit, first depressurize and isolate the backflow preventer. Remove the access cover and old check assembly, then insert the new check assembly from the kit. Reassemble the cover and test the valve per local codes. Always follow the manufacturer's instructions 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.

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, 809GC6, 3/4 in Compatible Valve Size, RK-919 (MPN RK 919-CK2-3/4). Key specifications — Compatible Valve Size: 3/4 in; Compatible with Grainger Part No.: 809GC6; Compatible with Series: RK-919; Compatible with Mfr. Model No.: 919; Includes: Check Assembly.
Watts
WATTS Backflow Preventer Repair Kits: Second Check Kit, 809GC6, 3/4 in Compatible Valve Size, RK-919 (MPN RK 919-CK2-3/4). Key specifications — Compatible Valve Size: 3/4 in; Compatible with Grainger Part No.: 809GC6; Compatible with Series: RK-919; Compatible with Mfr. Model No.: 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
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
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
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, 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
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, 809GC7, 1 in Compatible Valve Size, 919/LF919 (MPN RK 919-CK1 1). Key specifications — Compatible Valve Size: 1 in; Compatible with Grainger Part No.: 809GC7; Compatible with Series: RK-919; Compatible with Mfr. Model No.: LF919; Includes: Spring and Cover O-Ring.
Watts
WATTS Backflow Preventer Repair Kits: First Check Kit, 809GC7, 1 in Compatible Valve Size, 919/LF919 (MPN RK 919-CK1 1). Key specifications — Compatible Valve Size: 1 in; Compatible with Grainger Part No.: 809GC7; Compatible with Series: RK-919; Compatible with Mfr. Model No.: LF919; Includes: Spring and Cover O-Ring.

More from Watts

View all Watts parts →
WATTS Cap: Cap, 1/8 in Connection Size - Side 1, Male, IPS, Repair Part, Brass, Backflow Preventer (MPN SAE-TC Brass Cap 1/8 SAE). Key specifications — Compatible with Series: 4000B.
Watts
WATTS Cap: Cap, 1/8 in Connection Size - Side 1, Male, IPS, Repair Part, Brass, Backflow Preventer (MPN SAE-TC Brass Cap 1/8 SAE). Key specifications — Compatible with Series: 4000B.
WATTS Test Cock: Test Cock, 1/4 in Connection Size - Side 1, Male, NPT, Repair Part, Female, NSF (MPN 1/4 LFTC). Key specifications — Compatible with Series: 4000B.
Watts
WATTS Test Cock: Test Cock, 1/4 in Connection Size - Side 1, Male, NPT, Repair Part, Female, NSF (MPN 1/4 LFTC). Key specifications — Compatible with Series: 4000B.
WATTS Test Cock: Test Cock, 1/2 in Connection Size - Side 1, NPT, Repair Part, Bronze (MPN 1/2 LF-TC 757/957 2-1/2 - 4). Key specifications — Compatible with Series: Watts Series LF-TC, 1/2 in.
Watts
WATTS Test Cock: Test Cock, 1/2 in Connection Size - Side 1, NPT, Repair Part, Bronze (MPN 1/2 LF-TC 757/957 2-1/2 - 4). Key specifications — Compatible with Series: Watts Series LF-TC, 1/2 in.
WATTS Adapter: Test Cock, 1/4 in Connection Size - Side 1, Male, NPT, Repair Part, Bronze (MPN SAE-TC-Adapter 1/4). Key specifications — Compatible with Series: Watts Series SAE-TC, 1/4 in.
Watts
WATTS Adapter: Test Cock, 1/4 in Connection Size - Side 1, Male, NPT, Repair Part, Bronze (MPN SAE-TC-Adapter 1/4). Key specifications — Compatible with Series: Watts Series SAE-TC, 1/4 in.
WATTS Test Cock: Test Cock, 1/4 in Connection Size - Side 1, Male, NPT, Repair Part, Female, NPT (MPN 1/4 LF-TC). Key specifications — Compatible with Series: 4000B.
Watts
WATTS Test Cock: Test Cock, 1/4 in Connection Size - Side 1, Male, NPT, Repair Part, Female, NPT (MPN 1/4 LF-TC). Key specifications — Compatible with Series: 4000B.
WATTS Backflow Preventer Repair Kits: Second Check Kit, 1RCX3/1RCX5/1RCX7, 957/957RPDA, Repair Kit (MPN RK957/957RPDA-CK2-21/2-4). Key specifications — Compatible Valve Size: 2-1/2 in to 4 in; Compatible with Grainger Part No.: 1RCX3; Compatible with Series: RK-957; Compatible with Mfr. Model No.: 957; Includes: Second Check Module.
Watts
WATTS Backflow Preventer Repair Kits: Second Check Kit, 1RCX3/1RCX5/1RCX7, 957/957RPDA, Repair Kit (MPN RK957/957RPDA-CK2-21/2-4). Key specifications — Compatible Valve Size: 2-1/2 in to 4 in; Compatible with Grainger Part No.: 1RCX3; Compatible with Series: RK-957; Compatible with Mfr. Model No.: 957; Includes: Second Check Module.
WATTS Vacuum Breaker Repair Kit: Pressure Vacuum Breaker Check Kit, 1/2 - 3/4 800M4, Repair Kit (MPN 800M4-1/2-3/4 1st Check Kit). Key specifications — Compatible Valve Size: 1/2 in to 3/4 in; Compatible with Grainger Part No.: 793HT8; Compatible with Series: 800M4; Compatible with Mfr. Model No.: 1/2 - 3/4 800M4; Includes: Bonnet O-Ring.
Watts
WATTS Vacuum Breaker Repair Kit: Pressure Vacuum Breaker Check Kit, 1/2 - 3/4 800M4, Repair Kit (MPN 800M4-1/2-3/4 1st Check Kit). Key specifications — Compatible Valve Size: 1/2 in to 3/4 in; Compatible with Grainger Part No.: 793HT8; Compatible with Series: 800M4; Compatible with Mfr. Model No.: 1/2 - 3/4 800M4; Includes: Bonnet O-Ring.
WATTS Backflow Preventer Repair Kit: Complete Rubber Parts Kit, 6A771, 009-M1-QTS, Repair Kit, 009 (MPN RK 009 RT 3/4 - 1). Key specifications — Compatible Valve Size: 3/4 in to 1 in; Compatible with Grainger Part No.: 6A771; Compatible with Series: 009; Compatible with Mfr. Model No.: 009-M1-QTS; Includes: (2) Disc Assembly.
Watts
WATTS Backflow Preventer Repair Kit: Complete Rubber Parts Kit, 6A771, 009-M1-QTS, Repair Kit, 009 (MPN RK 009 RT 3/4 - 1). Key specifications — Compatible Valve Size: 3/4 in to 1 in; Compatible with Grainger Part No.: 6A771; Compatible with Series: 009; Compatible with Mfr. Model No.: 009-M1-QTS; Includes: (2) Disc Assembly.