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

Watts LFRK 909-RT 4 Repair Kit for Series 909 Backflow Preventers, 4 in - Repair Kits & Parts for Watts Backflow Preventers
WattsRepair Kits & Parts for Watts Backflow Preventers

Watts LFRK 909-RT 4 Repair Kit for Series 909 Backflow Preventers, 4 in

The WATTS Backflow Preventer Repair Kit (SKU 3G-OTH-436707) is a complete rubber parts kit designed for servicing Watts backflow preventers. It includes a diaphragm and is compatible with a 4-inch valve size, Series…

SKU 3G-OTH-436707

Also listed as: LFRK909RT4 · LFRK 909 RT 4 · LFRK-909-RT-4

Brand
Watts
Item
LFRK 909-RT 4 Repair Kit for Series 909 Backflow Preventers, 4 in
Category
Repair Kits & Parts for Watts Backflow Preventers
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
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

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 909-RT 4
Type
793PG4/793PG6, Repair Kit
LF909
4
Includes
Diaphragm
Compatible Valve Size
4 in
Compatible with Series
909
Compatible with Mfr. Model No.
4 LF909

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 3G-OTH-436707) is a complete rubber parts kit designed for servicing Watts backflow preventers. It includes a diaphragm and is compatible with a 4-inch valve size, Series 909, and manufacturer model number 4 LF909 (part number 793PG6). This repair kit, with manufacturer part number LFRK 909-RT 4, provides the essential rubber components for maintaining backflow preventers in the specified series.

Frequently Asked Questions

What is the Watts LFRK 909-RT 4 repair kit used for?

The Watts LFRK 909-RT 4 repair kit is used to service Watts backflow preventers in the Series 909, specifically the 4 LF909 model. It contains the essential rubber components, including a diaphragm, needed to restore proper sealing and function during routine maintenance or after a failure.

What are the specifications of the Watts LFRK 909-RT 4 repair kit?

The Watts LFRK 909-RT 4 repair kit includes a diaphragm and is compatible with a 4-inch valve size. It fits Watts Series 909 backflow preventers and the manufacturer model number 4 LF909. The kit is also compatible with part number LF909-DNRS-FS.

Where to buy the Watts LFRK 909-RT 4 repair kit worldwide?

You can source the Watts LFRK 909-RT 4 repair kit through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring you receive the correct Watts repair kit for your backflow preventer.

How to install the Watts LFRK 909-RT 4 repair kit?

To install the Watts LFRK 909-RT 4 repair kit, first depressurize and isolate the backflow preventer. Remove the valve bonnet and replace the old diaphragm and rubber parts with the new components from the kit. Reassemble and test for leaks per standard backflow maintenance procedures.

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

Compatible alternatives & equivalents

More from Watts

View all Watts parts
Repair kit for Watts backflow preventers, includes cover O-ring. Compatible with Series RK-SS009 and model SS009M3. Fits valve sizes from 1/4 in to 3/4 in. Used to replace check assembly and cover O-ring in backflow prevention systems
Watts
Repair kit for Watts backflow preventers, includes cover O-ring. Compatible with Series RK-SS009 and model SS009M3. Fits valve sizes from 1/4 in to 3/4 in. Used to replace check assembly and cover O-ring in backflow prevention systems
Repair kit for Watts Series 007 backflow preventers, compatible with valve sizes 1-1/2 in to 2 in and model 007MIQTS-S. Includes a cover O-ring. Used to replace worn rubber components during servicing of backflow preventers in water systems
Watts
Repair kit for Watts Series 007 backflow preventers, compatible with valve sizes 1-1/2 in to 2 in and model 007MIQTS-S. Includes a cover O-ring. Used to replace worn rubber components during servicing of backflow preventers in water systems
This total relief kit is designed for use with Watts Series 909 backflow preventers with an 8-inch valve size, including model 8 LF909M1. The kit includes a stem O-ring for replacing worn internal components. It is suitable for maintaining relief valve function in water systems
Watts
This total relief kit is designed for use with Watts Series 909 backflow preventers with an 8-inch valve size, including model 8 LF909M1. The kit includes a stem O-ring for replacing worn internal components. It is suitable for maintaining relief valve function in water systems
This repair kit is designed for servicing Watts Series 909 backflow preventers with a 4-inch valve size, including model 4 LF909. It contains a sleeve O-ring to replace worn components and restore proper sealing. Used in commercial and industrial water systems to maintain backflow protection
Watts
This repair kit is designed for servicing Watts Series 909 backflow preventers with a 4-inch valve size, including model 4 LF909. It contains a sleeve O-ring to replace worn components and restore proper sealing. Used in commercial and industrial water systems to maintain backflow protection
This repair kit is designed for servicing the first check assembly in Watts Series 009 backflow preventers. It includes a check assembly and is compatible with 3/4 in valve sizes, fitting models 3/4 009M3 and LF009M3. Used in commercial and residential water systems to maintain backflow prevention
Watts
This repair kit is designed for servicing the first check assembly in Watts Series 009 backflow preventers. It includes a check assembly and is compatible with 3/4 in valve sizes, fitting models 3/4 009M3 and LF009M3. Used in commercial and residential water systems to maintain backflow prevention
This total relief kit is designed for use with Watts Series 009 backflow preventers, compatible with M2 valve sizes. It includes a cover O-ring and is intended for replacing worn relief valve components in models such as 2 009M2 and LF009M2
Watts
This total relief kit is designed for use with Watts Series 009 backflow preventers, compatible with M2 valve sizes. It includes a cover O-ring and is intended for replacing worn relief valve components in models such as 2 009M2 and LF009M2
This repair kit is for servicing the first check valve in Watts 009 series backflow preventers. It includes a cover O-ring and is compatible with 2-inch valve sizes, fitting models 2 009M2 and LF009M2. Used in commercial and industrial water systems to maintain backflow prevention
Watts
This repair kit is for servicing the first check valve in Watts 009 series backflow preventers. It includes a cover O-ring and is compatible with 2-inch valve sizes, fitting models 2 009M2 and LF009M2. Used in commercial and industrial water systems to maintain backflow prevention
Watts
Watts
Repair kit for Watts 007 series backflow preventers. Includes cover O-ring. Compatible with 1/2 in valve size and model 1/2 LF007. Used to replace worn rubber parts in backflow prevention assemblies