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, 818DD4/818DD6 - Repair Kits & Parts for Watts Backflow Preventers
WattsRepair Kits & Parts for Watts Backflow Preventers

Watts Backflow Preventer Repair Kit: Backflow Preventer Repair Kit, 818DD4/818DD6

This Watts Backflow Preventer Repair Kit is a repair kit for Watts backflow preventers, compatible with valve sizes 3/4 in to 1 in. It includes a Seat O-Ring and is compatible with Series RK-909, manufacturer part…

SKU 3G-OTH-436870

Brand
Watts
Item
Backflow Preventer Repair Kit: Backflow Preventer Repair Kit, 818DD4/818DD6
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
909-3/4 - 1 2nd Check Kit
Type
818DD4/818DD6, 3/4 -1 LF909
Includes
Seat O-Ring
Compatible Valve Size
3/4 in to 1 in
Compatible with Series
RK-909
Compatible with Mfr. Model No.
3/4 -1 LF909
Compatible with Grainger Part No.
818DD4
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

This Watts Backflow Preventer Repair Kit is a repair kit for Watts backflow preventers, compatible with valve sizes 3/4 in to 1 in. It includes a Seat O-Ring and is compatible with Series RK-909, manufacturer part number 909-3/4 - 1 2nd Check Kit, and model 3/4 -1 LF909.

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
HAYWARD
HAYWARD
HAYWARD Electrically Actuated Butterfly Valve: For Corrosive Chemicals Media, CPVC, 120V, Wafer, BYV (MPN HRBYV22030E). Key specifications — Brand: HAYWARD.
HAYWARD
HAYWARD
HAYWARD Electrically Actuated Butterfly Valve: For Corrosive Chemicals Media, CPVC, 120V, Wafer, FKM (MPN HRBYV22025V). Key specifications — Brand: HAYWARD.
HAYWARD
HAYWARD
HAYWARD Electrically Actuated Butterfly Valve: For Corrosive Chemicals Media, CPVC, 120V, Wafer, FKM (MPN HRBYV22060V). Key specifications — Brand: HAYWARD.
HAYWARD
HAYWARD
HAYWARD Electrically Actuated Butterfly Valve: For Corrosive Chemicals Media, CPVC, 120V, Wafer, FKM (MPN HRBYV22020V). Key specifications — Brand: HAYWARD.

More from Watts

View all Watts parts →
WATTS Vacuum Breaker Repair Kit: Vent Float Kit, 36JD33/793HT9/809GD1/809GD2, 1 800M4, Repair Kit (MPN 800M4 1 Vent Kit). Key specifications — Compatible Valve Size: 1 in; Compatible with Grainger Part No.: 36JD33; Compatible with Series: 800M4; Compatible with Mfr. Model No.: 1 800M4; Includes: Float Vent Disc Assembly (Vent Float Seal and Spring).
Watts
WATTS Vacuum Breaker Repair Kit: Vent Float Kit, 36JD33/793HT9/809GD1/809GD2, 1 800M4, Repair Kit (MPN 800M4 1 Vent Kit). Key specifications — Compatible Valve Size: 1 in; Compatible with Grainger Part No.: 36JD33; Compatible with Series: 800M4; Compatible with Mfr. Model No.: 1 800M4; Includes: Float Vent Disc Assembly (Vent Float Seal and Spring).
WATTS Backflow Preventer Repair Kit: Complete Rubber Parts Kit, 793PG7, 6 in Compatible Valve Size (MPN LFRK 909-RT 6). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 793PG7; Compatible with Series: 909; Compatible with Mfr. Model No.: 6 LF909; Includes: Lubricant.
Watts
WATTS Backflow Preventer Repair Kit: Complete Rubber Parts Kit, 793PG7, 6 in Compatible Valve Size (MPN LFRK 909-RT 6). Key specifications — Compatible Valve Size: 6 in; Compatible with Grainger Part No.: 793PG7; Compatible with Series: 909; Compatible with Mfr. Model No.: 6 LF909; Includes: Lubricant.
WATTS First Check Valve Repair Kit: First Check Valve Kit, 818DD1/818DD7/818DE2, 1 1/4 - 2 LF909M1 (MPN LFRK909M1-CK1 1-1/4-2). Key specifications — Compatible Valve Size: 1-1/4 in to 2 in; Compatible with Grainger Part No.: 818DD7; Compatible with Series: 909; Compatible with Mfr. Model No.: 1-1/4 - 2 LF909M1; Includes: Cover O-Ring.
Watts
WATTS First Check Valve Repair Kit: First Check Valve Kit, 818DD1/818DD7/818DE2, 1 1/4 - 2 LF909M1 (MPN LFRK909M1-CK1 1-1/4-2). Key specifications — Compatible Valve Size: 1-1/4 in to 2 in; Compatible with Grainger Part No.: 818DD7; Compatible with Series: 909; Compatible with Mfr. Model No.: 1-1/4 - 2 LF909M1; Includes: Cover O-Ring.
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 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 Backflow Preventer Repair Kit: Complete Rubber Parts Kit, 1KYE6/6LL73, 009QT/SS009M3QT, 009 (MPN RK 009 RT 1/4 - 1/2). Key specifications — Compatible Valve Size: 1/4 in to 1/2 in; Compatible with Grainger Part No.: 1KYE6; Compatible with Series: 009; Compatible with Mfr. Model No.: SS009M3QT; Includes: Stem O-Rings.
Watts
WATTS Backflow Preventer Repair Kit: Complete Rubber Parts Kit, 1KYE6/6LL73, 009QT/SS009M3QT, 009 (MPN RK 009 RT 1/4 - 1/2). Key specifications — Compatible Valve Size: 1/4 in to 1/2 in; Compatible with Grainger Part No.: 1KYE6; Compatible with Series: 009; Compatible with Mfr. Model No.: SS009M3QT; Includes: Stem O-Rings.
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 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.