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Watts Backflow Preventer Repair Kits: First Check Kit, 3LF009NRS, 009/LF009, Repair Kit - Repair Kits & Parts for Watts Backflow Preventers
WattsRepair Kits & Parts for Watts Backflow Preventers

Watts Backflow Preventer Repair Kits: First Check Kit, 3LF009NRS, 009/LF009, Repair Kit

The WATTS Backflow Preventer Repair Kits: First Check Kit (SKU 3G-OTH-436739) is a repair kit for Watts backflow preventers, compatible with Series RK-LF009 and Mfr. Model No. LF009. It includes a Flow Tube O-Ring…

SKU 3G-OTH-436739

Also listed as: LFRK009CK12123 · LFRK 009 CK1 2 1 2 3 · LFRK-009-CK1-2-1-2-3

Brand
Watts
Item
Backflow Preventer Repair Kits: First Check Kit, 3LF009NRS, 009/LF009, Repair Kit
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
LFRK 009-CK1 2-1/2-3
Type
522P31, 009/LF009, Repair Kit, RK-LF009
Includes
Flow Tube O-Ring
Compatible Valve Size
2-1/2 in to 3 in
Compatible with Series
RK-LF009
Compatible with Mfr. Model No.
LF009

Technical Documents

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

Product Description

The WATTS Backflow Preventer Repair Kits: First Check Kit (SKU 3G-OTH-436739) is a repair kit for Watts backflow preventers, compatible with Series RK-LF009 and Mfr. Model No. LF009. It includes a Flow Tube O-Ring and fits valve sizes 2-1/2 in to 3 in. The manufacturer part number is LFRK 009-CK1 2-1/2-3, and it is compatible with Part No. 522P31.

Frequently Asked Questions

What is the Watts backflow preventer first check repair kit used for?

The Watts backflow preventer first check repair kit is used to service the first check valve assembly in Watts LF009 series backflow preventers. It includes a flow tube O-ring and is designed for valve sizes 2-1/2 in to 3 in, helping maintain backflow protection in commercial and industrial water systems.

What are the specifications of the Watts 3LF009NRS repair kit?

The Watts 3LF009NRS repair kit, also known as the first check kit (MPN LFRK 009-CK1 2-1/2-3), is compatible with Series RK-LF009 and Mfr. Model No. LF009. It includes a flow tube O-ring and fits valve sizes 2-1/2 in to 3 in. It is compatible with Part No. 3LF009NRS.

Where to buy Watts backflow preventer repair kits worldwide?

You can source Watts backflow preventer repair kits worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the 3LF009NRS first check kit or other Watts repair parts.

How to install a Watts backflow preventer first check repair kit?

To install the Watts first check repair kit, isolate the backflow preventer and relieve pressure. Remove the first check valve assembly, replace the old O-ring with the included flow tube O-ring, and reassemble. Follow Watts' generic installation guidelines for LF009 series devices. Always test the assembly after installation to ensure proper sealing.

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: Second Check Kit, 3LF009NRS, 009/LF009, Repair Kit, RK-LF009 (MPN LFRK 009-CK2 2-1/2-3)
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WATTS Backflow Preventer Repair Kits: Second Check Kit, 3LF009NRS, 009/LF009, Repair Kit, RK-LF009 (MPN LFRK 009-CK2 2-1/2-3)
WATTS Backflow Preventer Repair Kits: Total Relief Valve Kit, 3LF009NRS, 009/LF009, LF009 (MPN LFRK 009-VT 2-1/2-3)
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WATTS Backflow Preventer Repair Kits: Total Relief Valve Kit, 3LF009NRS, 009/LF009, LF009 (MPN LFRK 009-VT 2-1/2-3)
WATTS Backflow Preventer Repair Kits: First or Second Check Kit, LF709-NRS/LF709-NRS/LF709-OSY/LF709-OSY (MPN LFRK 709-CK4 2-1/2-3)
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WATTS Backflow Preventer Repair Kits: First or Second Check Kit, LF709-NRS/LF709-NRS/LF709-OSY/LF709-OSY (MPN LFRK 709-CK4 2-1/2-3)
Repair kit for Watts 709 and RK-LF709 series backflow preventers. Includes cover O-ring. Compatible with 4-inch valve size. Used for replacing first or second check assembly in commercial and industrial water systems
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Repair kit for Watts 709 and RK-LF709 series backflow preventers. Includes cover O-ring. Compatible with 4-inch valve size. Used for replacing first or second check assembly in commercial and industrial water systems
WATTS Backflow Preventer Repair Kits: First or Second Check Kit, LF709-NRS/LF709-OSY, 709/LF709, RK-LF709 (MPN LFRK 709-CK4 8)
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WATTS Backflow Preventer Repair Kits: First or Second Check Kit, LF709-NRS/LF709-OSY, 709/LF709, RK-LF709 (MPN LFRK 709-CK4 8)
WATTS Backflow Preventer Repair Kits: First or Second Check Kit, LF709-NRS/LF709-OSY, 709/LF709, RK-LF709 (MPN LFRK 709-CK4 10)
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WATTS Backflow Preventer Repair Kits: First or Second Check Kit, LF709-NRS/LF709-OSY, 709/LF709, RK-LF709 (MPN LFRK 709-CK4 10)

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