We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
⌕
RFQ CartGet a QuoteSign inSign up
Watts Backflow Preventer Repair Kit: Backflow Preventer Repair Kit, 809GC7, 1 LF919-QT-S-FS - Repair Kits & Parts for Watts Backflow Preventers
WattsRepair Kits & Parts for Watts Backflow Preventers

Watts Backflow Preventer Repair Kit: Backflow Preventer Repair Kit, 809GC7, 1 LF919-QT-S-FS

The WATTS Backflow Preventer Repair Kit (SKU 852WF1) is a repair kit for Watts backflow preventers, including a Second Check Repair Kit. It is compatible with 1 in valve sizes, Series RK-919, and manufacturer model…

SKU 3G-OTH-436855

Brand
Watts
Item
Backflow Preventer Repair Kit: Backflow Preventer Repair Kit, 809GC7, 1 LF919-QT-S-FS
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-T 1
Type
809GC7, RK-919
Includes
Second Check Repair Kit
LF919-QT-S-FS
1
Compatible Valve Size
1 in
Compatible with Series
RK-919
Compatible with Mfr. Model No.
1 LF919-QT-S-FS
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 Kit (SKU 852WF1) is a repair kit for Watts backflow preventers, including a Second Check Repair Kit. It is compatible with 1 in valve sizes, Series RK-919, and manufacturer model number 1 LF919-QT-S-FS.

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 Kit: Backflow Preventer Repair Kit, 809GC8/809GC9, Repair Kit (MPN RK 919-T 1-1/4-1-1/2). Key specifications — Compatible Valve Size: 1-1/4 in; Compatible with Grainger Part No.: 809GC9; Compatible with Series: RK-919; Compatible with Mfr. Model No.: 1-1/4 LF919-QT-S-FS; Includes: Second Check Repair Kit.
Watts
WATTS Backflow Preventer Repair Kit: Backflow Preventer Repair Kit, 809GC8/809GC9, Repair Kit (MPN RK 919-T 1-1/4-1-1/2). Key specifications — Compatible Valve Size: 1-1/4 in; Compatible with Grainger Part No.: 809GC9; Compatible with Series: RK-919; Compatible with Mfr. Model No.: 1-1/4 LF919-QT-S-FS; Includes: Second Check Repair Kit.
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 Backflow Preventer Repair Kit: Backflow Preventer Repair Kit, 809GC6, 3/4 LF919-QT-S-FS (MPN RK 919-T 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.: 3/4 LF919-QT-S-FS; Includes: Second Check Repair Kit.
Watts
WATTS Backflow Preventer Repair Kit: Backflow Preventer Repair Kit, 809GC6, 3/4 LF919-QT-S-FS (MPN RK 919-T 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.: 3/4 LF919-QT-S-FS; Includes: Second Check Repair Kit.
WATTS Backflow Preventer Repair Kit: Backflow Preventer Repair Kit, Repair Kit, RK-919 (MPN RK 919-T 1/4-1/2). Key specifications — Compatible Valve Size: 1/4 in; Compatible with Series: RK-919; Compatible with Mfr. Model No.: 1/4 LF919-QT-S-FS; Includes: Second Check Repair Kit.
Watts
WATTS Backflow Preventer Repair Kit: Backflow Preventer Repair Kit, Repair Kit, RK-919 (MPN RK 919-T 1/4-1/2). Key specifications — Compatible Valve Size: 1/4 in; Compatible with Series: RK-919; Compatible with Mfr. Model No.: 1/4 LF919-QT-S-FS; Includes: Second Check Repair Kit.
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, 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 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 or Second Check Kit, 36JC56/36JC62, 709/LF709, RK-LF709 (MPN LFRK 709-CK4 6). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 36JC62; Compatible with Series: RK-LF709; Compatible with Mfr. Model No.: 709; Includes: Disc and Spring Assembly.
Watts
WATTS Backflow Preventer Repair Kits: First or Second Check Kit, 36JC56/36JC62, 709/LF709, RK-LF709 (MPN LFRK 709-CK4 6). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 36JC62; Compatible with Series: RK-LF709; Compatible with Mfr. Model No.: 709; Includes: Disc and Spring Assembly.
WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 429J28/793HF6/793HL3/818DD5, 009 (MPN 009-1/4 - 1/2 1st Check Kit). Key specifications — Compatible Valve Size: 1/4 in to 1/2 in; Compatible with Grainger Part No.: 793HL3; Compatible with Series: 009; Compatible with Mfr. Model No.: 1/4 - 1/2 009/LF009; Includes: Check Assembly.
Watts
WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 429J28/793HF6/793HL3/818DD5, 009 (MPN 009-1/4 - 1/2 1st Check Kit). Key specifications — Compatible Valve Size: 1/4 in to 1/2 in; Compatible with Grainger Part No.: 793HL3; Compatible with Series: 009; Compatible with Mfr. Model No.: 1/4 - 1/2 009/LF009; Includes: Check Assembly.
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.
Watts
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.
WATTS Backflow Preventer Repair Kits: First Check Kit, 1KYD2/1KYD7/1KYD9, 757/757DCDA, Repair Kit (MPN RK757/DCDA-CK1-RS 21/2-4). Key specifications — Compatible Valve Size: 2-1/2 in to 4 in; Compatible with Grainger Part No.: 1KYD2; Compatible with Series: 757DCDA; Compatible with Mfr. Model No.: 757; Includes: Red Silicone Disc Elastomer.
Watts
WATTS Backflow Preventer Repair Kits: First Check Kit, 1KYD2/1KYD7/1KYD9, 757/757DCDA, Repair Kit (MPN RK757/DCDA-CK1-RS 21/2-4). Key specifications — Compatible Valve Size: 2-1/2 in to 4 in; Compatible with Grainger Part No.: 1KYD2; Compatible with Series: 757DCDA; Compatible with Mfr. Model No.: 757; Includes: Red Silicone Disc Elastomer.
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, 36JC71/36JC72/36JC73/36JC78/36JC79/36JC80 (MPN RK774/774DCDA-CK1-21/2-4). Key specifications — Compatible Valve Size: 2-1/2 in to 4 in; Compatible with Grainger Part No.: 36JC80; Compatible with Series: RK-774; Compatible with Mfr. Model No.: 774; Includes: Cam Check with a Check O-Ring.
Watts
WATTS Backflow Preventer Repair Kits: First Check Kit, 36JC71/36JC72/36JC73/36JC78/36JC79/36JC80 (MPN RK774/774DCDA-CK1-21/2-4). Key specifications — Compatible Valve Size: 2-1/2 in to 4 in; Compatible with Grainger Part No.: 36JC80; Compatible with Series: RK-774; Compatible with Mfr. Model No.: 774; Includes: Cam Check with a Check O-Ring.
WATTS Backflow Preventer Repair Kits: Repair Kit, 6AUW6, 2 1/2 in to 3 in Compatible Valve Size (MPN ARK HMB/BLT VT 2.5-3). Key specifications — Compatible Valve Size: 2-1/2 in to 3 in; Compatible with Grainger Part No.: 6AUW6; Compatible with Series: 5000SS; Compatible with Mfr. Model No.: 6000HMB.
Watts
WATTS Backflow Preventer Repair Kits: Repair Kit, 6AUW6, 2 1/2 in to 3 in Compatible Valve Size (MPN ARK HMB/BLT VT 2.5-3). Key specifications — Compatible Valve Size: 2-1/2 in to 3 in; Compatible with Grainger Part No.: 6AUW6; Compatible with Series: 5000SS; Compatible with Mfr. Model No.: 6000HMB.