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

3G Electric
⌕
RFQ CartGet a QuoteSign inSign up
Watts Backflow Preventer Repair Kits: First Check Kit, 1KYD2/1KYD7/1KYD9, 757/757DCDA - Repair Kits & Parts for Watts Backflow Preventers
WattsRepair Kits & Parts for Watts Backflow Preventers

Watts Backflow Preventer Repair Kits: First Check Kit, 1KYD2/1KYD7/1KYD9, 757/757DCDA

The Watts First Check Kit (MPN RK757/DCDA-CK1-RS 21/2-4) is a repair kit for Watts 757 and 757DCDA series backflow preventers. It includes a red silicone disc elastomer and is compatible with valve sizes 2-1/2 in to…

SKU 3G-OTH-436844

Brand
Watts
Item
Backflow Preventer Repair Kits: First Check Kit, 1KYD2/1KYD7/1KYD9, 757/757DCDA
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
RK757/DCDA-CK1-RS 21/2-4
Type
1KYD2/1KYD7/1KYD9, 757/757DCDA, Repair Kit
Includes
Red Silicone Disc Elastomer
Compatible Valve Size
2-1/2 in to 4 in
Compatible with Series
757DCDA
Compatible with Mfr. Model No.
757
Compatible with Grainger Part No.
1KYD2
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 Kit (MPN RK757/DCDA-CK1-RS 21/2-4) is a repair kit for Watts 757 and 757DCDA series backflow preventers. It includes a red silicone disc elastomer and is compatible with valve sizes 2-1/2 in to 4 in.

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 BYV Series PVC Body: For Gas/Oil/Water Media, PVC, 120V AC, 8 in Pipe Size, Lug, PVC, EPDM (MPN HRBYV11080E). Key specifications — Input Control Signal: Manual; Brand: HAYWARD.
HAYWARD
HAYWARD BYV Series PVC Body: For Gas/Oil/Water Media, PVC, 120V AC, 8 in Pipe Size, Lug, PVC, EPDM (MPN HRBYV11080E). Key specifications — Input Control Signal: Manual; Brand: HAYWARD.
HAYWARD BYV Series PVC Body: For Gas/Oil/Water Media, PVC, 120V AC, 6 in Pipe Size, Lug, PVC, EPDM (MPN HRBYV11060E). Key specifications — Input Control Signal: Manual; Brand: HAYWARD.
HAYWARD
HAYWARD BYV Series PVC Body: For Gas/Oil/Water Media, PVC, 120V AC, 6 in Pipe Size, Lug, PVC, EPDM (MPN HRBYV11060E). Key specifications — Input Control Signal: Manual; Brand: HAYWARD.
HAYWARD BYV Series PVC Body: For Gas/Oil/Water Media, PVC, 120V AC, 4 in Pipe Size, Lug, PVC, EPDM (MPN HRBYV11040E). Key specifications — Input Control Signal: Manual; Brand: HAYWARD.
HAYWARD
HAYWARD BYV Series PVC Body: For Gas/Oil/Water Media, PVC, 120V AC, 4 in Pipe Size, Lug, PVC, EPDM (MPN HRBYV11040E). Key specifications — Input Control Signal: Manual; Brand: HAYWARD.
HAYWARD BYV Series PVC Body: For Gas/Oil/Water Media, PVC, 120V AC, 2 in Pipe Size, Lug, PVC, EPDM (MPN HRBYV11020E). Key specifications — Input Control Signal: Manual; Brand: HAYWARD.
HAYWARD
HAYWARD BYV Series PVC Body: For Gas/Oil/Water Media, PVC, 120V AC, 2 in Pipe Size, Lug, PVC, EPDM (MPN HRBYV11020E). Key specifications — Input Control Signal: Manual; Brand: HAYWARD.
HAYWARD BYV Series PVC Body: For Gas/Oil/Water Media, PVC, 120V AC, 2 1/2 in Pipe Size, Lug, PVC (MPN HRBYV11025E). Key specifications — Input Control Signal: Manual; Brand: HAYWARD.
HAYWARD
HAYWARD BYV Series PVC Body: For Gas/Oil/Water Media, PVC, 120V AC, 2 1/2 in Pipe Size, Lug, PVC (MPN HRBYV11025E). Key specifications — Input Control Signal: Manual; Brand: HAYWARD.
HAYWARD BYV Series PVC Body: For Gas/Oil/Water Media, PVC, 120V AC, 2 in Pipe Size, Lug, PVC, FKM (MPN HRBYV11020V). Key specifications — Input Control Signal: Manual; Brand: HAYWARD.
HAYWARD
HAYWARD BYV Series PVC Body: For Gas/Oil/Water Media, PVC, 120V AC, 2 in Pipe Size, Lug, PVC, FKM (MPN HRBYV11020V). Key specifications — Input Control Signal: Manual; Brand: HAYWARD.

More from Watts

View all Watts parts →
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
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
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
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
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
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, 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
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
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: Repair Kit, 6AUW6, 2 1/2 in to 3 in Compatible Valve Size (MPN ARK HMB/BLT VT 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.: 6000HMB.
Watts
WATTS Backflow Preventer Repair Kits: Repair Kit, 6AUW6, 2 1/2 in to 3 in Compatible Valve Size (MPN ARK HMB/BLT VT 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.: 6000HMB.