We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

Watts First Check Valve Repair Kit: First Check Valve Kit, 818DD1/818DD7/818DE2 - Repair Kits & Parts for Watts Backflow Preventers

WattsRepair Kits & Parts for Watts Backflow Preventers

Watts First Check Valve Repair Kit: First Check Valve Kit, 818DD1/818DD7/818DE2

The WATTS First Check Valve Repair Kit (SKU 30UK49) is a repair kit for Watts backflow preventers, designed for use with Series 909 models. It is compatible with valve sizes from 1-1/4 in to 2 in and includes a Cover…

SKU 3G-OTH-436831

Brand

Watts

Item

First Check Valve Repair Kit: First Check Valve Kit, 818DD1/818DD7/818DE2

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.

Create free account →Log in

Worldwide Shipping

Air & sea freight

Datasheet on Request

Technical specs

1-Day Quote

Replies within 24h

Technical Specifications

Watts

Manufacturer Part Number

LFRK909M1-CK1 1-1/4-2 

Type

818DD1/818DD7/818DE2 

LF909M1

1 1/4 - 2 

Includes

Cover O-Ring 

Compatible Valve Size

1-1/4 in to 2 in 

Compatible with Series

909

Compatible with Mfr. Model No.

1-1/4 - 2 LF909M1 

Compatible with Grainger Part No.

818DD7

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 First Check Valve Repair Kit (SKU 30UK49) is a repair kit for Watts backflow preventers, designed for use with Series 909 models. It is compatible with valve sizes from 1-1/4 in to 2 in and includes a Cover O-Ring. The kit is identified by manufacturer part number LFRK909M1-CK1 1-1/4-2 and is compatible with Grainger part number 818DD7.

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.

Browse all Watts products →Contact our engineers →

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description

WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 793PG4/793PG6, 4 LF909, Repair Kit (MPN LFRK 909-CK1 4). Key specifications — Compatible Valve Size: 4 in; Compatible with Grainger Part No.: 793PG6; Compatible with Series: RK-LF909; Compatible with Mfr. Model No.: 4 LF909; Includes: A Cover O-Ring.

WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 793PG4/793PG6, 4 LF909, Repair Kit (MPN LFRK 909-CK1 4). Key specifications — Compatible Valve Size: 4 in; Compatible with Grainger Part No.: 793PG6; Compatible with Series: RK-LF909; Compatible with Mfr. Model No.: 4 LF909; Includes: A Cover O-Ring.

WATTS First Check Valve Repair Kit: First Check Valve Kit, 793PG1/793PG2/793PG3/793PG5, Repair Kit (MPN LFRK 909-CK1 2-1/2-3). Key specifications — Compatible Valve Size: 2-1/2 in to 3 in; Compatible with Grainger Part No.: 793PG1; Compatible with Series: 909; Compatible with Mfr. Model No.: 2-1/2-3 LF909; Includes: Lubricant.

WATTS First Check Valve Repair Kit: First Check Valve Kit, 793PG1/793PG2/793PG3/793PG5, Repair Kit (MPN LFRK 909-CK1 2-1/2-3). Key specifications — Compatible Valve Size: 2-1/2 in to 3 in; Compatible with Grainger Part No.: 793PG1; Compatible with Series: 909; Compatible with Mfr. Model No.: 2-1/2-3 LF909; Includes: Lubricant.

WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 818DD1/818DD7/818DE2, Repair Kit (MPN 909 M1 1-1/4 - 2 1st Check Kit). Key specifications — Compatible Valve Size: M1; Compatible with Grainger Part No.: 818DE2; Compatible with Series: 909; Compatible with Mfr. Model No.: 1-1/4 - 2 LF909M1; Includes: Lubricant.

WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 818DD1/818DD7/818DE2, Repair Kit (MPN 909 M1 1-1/4 - 2 1st Check Kit). Key specifications — Compatible Valve Size: M1; Compatible with Grainger Part No.: 818DE2; Compatible with Series: 909; Compatible with Mfr. Model No.: 1-1/4 - 2 LF909M1; Includes: Lubricant.

WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 818DD4/818DD6, 3/4 -1 LF909 (MPN 909-3/4 - 1 1st Check Kit). Key specifications — Compatible Valve Size: 3/4 in to 1 in; Compatible with Grainger Part No.: 818DD4; Compatible with Series: RK-909; Compatible with Mfr. Model No.: 3/4 -1 LF909; Includes: Lubricant.

WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 818DD4/818DD6, 3/4 -1 LF909 (MPN 909-3/4 - 1 1st Check Kit). Key specifications — Compatible Valve Size: 3/4 in to 1 in; Compatible with Grainger Part No.: 818DD4; Compatible with Series: RK-909; Compatible with Mfr. Model No.: 3/4 -1 LF909; Includes: Lubricant.

WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 793PG1/793PG2/793PG3/793PG5 (MPN 909 2-1/2 - 3 1st Check Kit). Key specifications — Compatible Valve Size: 2-1/2 in to 3 in; Compatible with Grainger Part No.: 793PG1; Compatible with Series: RK-LF909; Compatible with Mfr. Model No.: 2-1/2-3 LF909; Includes: Cover O-Ring.

WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 793PG1/793PG2/793PG3/793PG5 (MPN 909 2-1/2 - 3 1st Check Kit). Key specifications — Compatible Valve Size: 2-1/2 in to 3 in; Compatible with Grainger Part No.: 793PG1; Compatible with Series: RK-LF909; Compatible with Mfr. Model No.: 2-1/2-3 LF909; Includes: Cover O-Ring.

WATTS Backflow Preventer Repair Kit: Complete Rubber Parts Kit, 818DD1/818DD7/818DE2, Repair Kit (MPN LFRK 909M1-RT 1-1/4-2). Key specifications — Compatible Valve Size: 1-1/4 in to 2 in; Compatible with Grainger Part No.: 818DE2; Compatible with Series: 909; Compatible with Mfr. Model No.: 1-1/4-2 LF909M1; Includes: Seat O-Ring.

WATTS Backflow Preventer Repair Kit: Complete Rubber Parts Kit, 818DD1/818DD7/818DE2, Repair Kit (MPN LFRK 909M1-RT 1-1/4-2). Key specifications — Compatible Valve Size: 1-1/4 in to 2 in; Compatible with Grainger Part No.: 818DE2; Compatible with Series: 909; Compatible with Mfr. Model No.: 1-1/4-2 LF909M1; Includes: Seat O-Ring.

More from Watts

View all Watts parts →

WATTS Relief Kit: Relief Kit, 793HG3/793HG4/793HL6/793HL7/793HP6/818DD9, 1 1/4 - 1 1/2 009M2/LF009M2 (MPN 009 M2 1-1/4 - 1-1/2 Total Relief Kit). Key specifications — Compatible Valve Size: M2; Compatible with Grainger Part No.: 793HL7; Compatible with Series: 009; Compatible with Mfr. Model No.: 1-1/4 - 1-1/2 009M2/LF009M2; Includes: Upper Stem O-Ring.

WATTS Relief Kit: Relief Kit, 793HG3/793HG4/793HL6/793HL7/793HP6/818DD9, 1 1/4 - 1 1/2 009M2/LF009M2 (MPN 009 M2 1-1/4 - 1-1/2 Total Relief Kit). Key specifications — Compatible Valve Size: M2; Compatible with Grainger Part No.: 793HL7; Compatible with Series: 009; Compatible with Mfr. Model No.: 1-1/4 - 1-1/2 009M2/LF009M2; Includes: Upper Stem O-Ring.

WATTS Vacuum Breaker Repair Kit: Rubber Parts Repair Kit, 1/2 in to 3/4 in Compatible Valve Size (MPN 800M3-1/2-3/4 Rubber Kit). Key specifications — Compatible Valve Size: 1/2 in to 3/4 in; Compatible with Series: 800M3; Compatible with Mfr. Model No.: 1/2 - 3/4 800M3; Includes: Bonnet O-Ring.

WATTS Vacuum Breaker Repair Kit: Rubber Parts Repair Kit, 1/2 in to 3/4 in Compatible Valve Size (MPN 800M3-1/2-3/4 Rubber Kit). Key specifications — Compatible Valve Size: 1/2 in to 3/4 in; Compatible with Series: 800M3; Compatible with Mfr. Model No.: 1/2 - 3/4 800M3; Includes: Bonnet O-Ring.

WATTS Vacuum Breaker Repair Kit: Rubber Repair Kit, 1/2 in to 1 in/M2 Compatible Valve Size, 800M2 (MPN 800M2-1/2-1 Rubber Kit). Key specifications — Compatible Valve Size: M2; Compatible with Series: 800M2; Compatible with Mfr. Model No.: 1/2 - 1 800M2; Includes: Float Vent Disc Assembly (Vent Float Seal and Spring).

WATTS Vacuum Breaker Repair Kit: Rubber Repair Kit, 1/2 in to 1 in/M2 Compatible Valve Size, 800M2 (MPN 800M2-1/2-1 Rubber Kit). Key specifications — Compatible Valve Size: M2; Compatible with Series: 800M2; Compatible with Mfr. Model No.: 1/2 - 1 800M2; Includes: Float Vent Disc Assembly (Vent Float Seal and Spring).

WATTS Backflow Preventer Repair Kits: Repair Kit, 6AUW6, 2 1/2 in to 3 in Compatible Valve Size (MPN ARK HMB/BLT CK1 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.: 4000BLT.

WATTS Backflow Preventer Repair Kits: Repair Kit, 6AUW6, 2 1/2 in to 3 in Compatible Valve Size (MPN ARK HMB/BLT CK1 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.: 4000BLT.

WATTS Backflow Preventer Repair Kit: Backflow Preventer Repair Kit, 818DD4/818DD6, 3/4 -1 LF909 (MPN 909-3/4 - 1 2nd Check Kit). Key specifications — Compatible Valve Size: 3/4 in to 1 in; Compatible with Grainger Part No.: 818DD4; Compatible with Series: RK-909; Compatible with Mfr. Model No.: 3/4 -1 LF909; Includes: Seat O-Ring.

WATTS Backflow Preventer Repair Kit: Backflow Preventer Repair Kit, 818DD4/818DD6, 3/4 -1 LF909 (MPN 909-3/4 - 1 2nd Check Kit). Key specifications — Compatible Valve Size: 3/4 in to 1 in; Compatible with Grainger Part No.: 818DD4; Compatible with Series: RK-909; Compatible with Mfr. Model No.: 3/4 -1 LF909; Includes: Seat O-Ring.

WATTS Backflow Preventer Repair Kits: Complete Rubber Parts Kit, 429J27/6A768/793HH2/812MY6/818DE4 (MPN RK 007M1-RT 3/4-1). Key specifications — Compatible Valve Size: 3/4 in to 1 in; Compatible with Grainger Part No.: 818DE4; Compatible with Series: 007M1; Compatible with Mfr. Model No.: 3/4 007M1; Includes: Cover O-Ring.

WATTS Backflow Preventer Repair Kits: Complete Rubber Parts Kit, 429J27/6A768/793HH2/812MY6/818DE4 (MPN RK 007M1-RT 3/4-1). Key specifications — Compatible Valve Size: 3/4 in to 1 in; Compatible with Grainger Part No.: 818DE4; Compatible with Series: 007M1; Compatible with Mfr. Model No.: 3/4 007M1; Includes: Cover O-Ring.

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, 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 Test Cock: Test Cock, 1/8 in Connection Size - Side 1, NPT, Repair Part, Bronze (MPN 1/8 LF-NPT-TC). Key specifications — Compatible with Series: Watts Series LF-NPT-TC, 1/8 in.

WATTS Test Cock: Test Cock, 1/8 in Connection Size - Side 1, NPT, Repair Part, Bronze (MPN 1/8 LF-NPT-TC). Key specifications — Compatible with Series: Watts Series LF-NPT-TC, 1/8 in.