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Watts First Check Valve Repair Kit: First Check Kit, 793HG9/818DD3/818DE0/818DE3 - Repair Kits & Parts for Watts Backflow Preventers

WattsRepair Kits & Parts for Watts Backflow Preventers

Watts First Check Valve Repair Kit: First Check Kit, 793HG9/818DD3/818DE0/818DE3

The WATTS First Check Valve Repair Kit is a repair kit for Watts backflow preventers, specifically designed for the Series 009. This kit includes a check assembly and is compatible with 3/4 in valve sizes, fitting…

SKU 3G-OTH-436674

Brand

Watts

Item

First Check Valve Repair Kit: First Check Kit, 793HG9/818DD3/818DE0/818DE3

Category

Repair Kits & Parts for Watts Backflow Preventers

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Technical Specifications

Watts

Manufacturer Part Number

009 M3-3/4 1st Check Kit 

Type

793HG9/818DD3/818DE0/818DE3, 3/4 009M3/LF009M3 

Includes

Check Assembly 

Compatible Valve Size

3/4 in 

Compatible with Series

009

Compatible with Mfr. Model No.

3/4 009M3/LF009M3 

Compatible with Grainger Part No.

818DE0

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Watts Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

The WATTS First Check Valve Repair Kit is a repair kit for Watts backflow preventers, specifically designed for the Series 009. This kit includes a check assembly and is compatible with 3/4 in valve sizes, fitting models 3/4 009M3 and LF009M3 (MPN 009 M3-3/4 1st Check Kit).

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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WATTS First Check Valve Repair Kit: First Check Kit, 793HG3/793HG4/793HL6/793HL7/793HP6/818DD9, 009 (MPN 009 M2 1-1/4 - 1-1/2 1st Check Kit). Key specifications — Compatible Valve Size: M2; Compatible with Grainger Part No.: 793HG4; Compatible with Series: 009; Compatible with Mfr. Model No.: 1-1/4 - 1-1/2 009M2/LF009M2; Includes: Check Assembly.

WATTS First Check Valve Repair Kit: First Check Kit, 793HG3/793HG4/793HL6/793HL7/793HP6/818DD9, 009 (MPN 009 M2 1-1/4 - 1-1/2 1st Check Kit). Key specifications — Compatible Valve Size: M2; Compatible with Grainger Part No.: 793HG4; Compatible with Series: 009; Compatible with Mfr. Model No.: 1-1/4 - 1-1/2 009M2/LF009M2; Includes: Check Assembly.

WATTS First Check Valve Repair Kit: First Check Kit, 793HG7/793HL8/818DD2, 2 009M2/LF009M2, 009 (MPN 009 M2 2 1st Check Kit). Key specifications — Compatible Valve Size: 2 in; Compatible with Grainger Part No.: 793HL8; Compatible with Series: 009; Compatible with Mfr. Model No.: 2 009M2/LF009M2; Includes: Cover O-Ring.

WATTS First Check Valve Repair Kit: First Check Kit, 793HG7/793HL8/818DD2, 2 009M2/LF009M2, 009 (MPN 009 M2 2 1st Check Kit). Key specifications — Compatible Valve Size: 2 in; Compatible with Grainger Part No.: 793HL8; Compatible with Series: 009; Compatible with Mfr. Model No.: 2 009M2/LF009M2; Includes: Cover O-Ring.

WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 793HG2/793HL5/818DE6/818DE8, 007 (MPN 007 M2 1-1/2 - 2 1st Check Kit). Key specifications — Compatible Valve Size: 1-1/2 in to 2 in; Compatible with Grainger Part No.: 818DE6; Compatible with Series: 007; Compatible with Mfr. Model No.: 1-1/4-1-1/2 007M2/LF007M2; Includes: Seat O-Ring.

WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 793HG2/793HL5/818DE6/818DE8, 007 (MPN 007 M2 1-1/2 - 2 1st Check Kit). Key specifications — Compatible Valve Size: 1-1/2 in to 2 in; Compatible with Grainger Part No.: 818DE6; Compatible with Series: 007; Compatible with Mfr. Model No.: 1-1/4-1-1/2 007M2/LF007M2; Includes: Seat O-Ring.

WATTS First Check Valve Repair Kit: First Check Kit, 26X140/429J30/793HG8/818DD8, 1 009M2/LF009M2 (MPN 009 M2 1 1st Check Kit). Key specifications — Compatible Valve Size: M2; Compatible with Grainger Part No.: 26X140; Compatible with Series: 009; Compatible with Mfr. Model No.: 1 009M2/LF009M2; Includes: Check Assembly.

WATTS First Check Valve Repair Kit: First Check Kit, 26X140/429J30/793HG8/818DD8, 1 009M2/LF009M2 (MPN 009 M2 1 1st Check Kit). Key specifications — Compatible Valve Size: M2; Compatible with Grainger Part No.: 26X140; Compatible with Series: 009; Compatible with Mfr. Model No.: 1 009M2/LF009M2; Includes: Check Assembly.

WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 522P30/812MY5/818DE7, Repair Kit (MPN 007 M3-3/4 1st Check Kit). Key specifications — Compatible Valve Size: M3; Compatible with Grainger Part No.: 522P30; Compatible with Series: 007; Compatible with Mfr. Model No.: 3/4 007M3/LF007M3; Includes: Check Cage.

WATTS First Check Valve Repair Kit: First Check Valve Repair Kit, 522P30/812MY5/818DE7, Repair Kit (MPN 007 M3-3/4 1st Check Kit). Key specifications — Compatible Valve Size: M3; Compatible with Grainger Part No.: 522P30; Compatible with Series: 007; Compatible with Mfr. Model No.: 3/4 007M3/LF007M3; Includes: Check Cage.

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.

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WATTS Backflow Preventer Repair Kit: Complete Rubber Parts Kit, 6A770, 009QT, Repair Kit, 009 (MPN RK 009SSM3 RT 1/4-3/4). Key specifications — Compatible Valve Size: 3/4 in to 1 in; Compatible with Grainger Part No.: 6A770; Compatible with Series: 009; Compatible with Mfr. Model No.: 009QT; Includes: Stem O-Rings.

WATTS Backflow Preventer Repair Kit: Complete Rubber Parts Kit, 6A770, 009QT, Repair Kit, 009 (MPN RK 009SSM3 RT 1/4-3/4). Key specifications — Compatible Valve Size: 3/4 in to 1 in; Compatible with Grainger Part No.: 6A770; Compatible with Series: 009; Compatible with Mfr. Model No.: 009QT; Includes: Stem O-Rings.

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: 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 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 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 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 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 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 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.