We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

Watts Vacuum Breaker Repair Kit: Backflow Repair Kit, 1/2 in to 3/4 in Compatible Valve Size - Repair Kits & Parts for Watts Backflow Preventers
WattsRepair Kits & Parts for Watts Backflow Preventers

Watts Vacuum Breaker Repair Kit: Backflow Repair Kit, 1/2 in to 3/4 in Compatible Valve Size

The WATTS Vacuum Breaker Repair Kit is a backflow repair kit designed for use with Watts 800M3 series backflow preventers. It is compatible with valve sizes from 1/2 in to 3/4 in and includes a bonnet O-ring. The…

SKU 3G-OTH-436828

Also listed as: 800M312341stCheckKit · 800M3 1 2 3 4 1st Check Kit · 800M3-1-2-3-4-1st-Check-Kit

Brand
Watts
Item
Vacuum Breaker Repair Kit: Backflow Repair Kit, 1/2 in to 3/4 in Compatible Valve Size
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

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

Watts
Manufacturer Part Number
800M3-1/2-3/4 1st Check Kit
Type
800M3
Includes
Bonnet O-Ring
Compatible Valve Size
1/2 in to 3/4 in
Compatible with Series
800M3
Compatible with Mfr. Model No.
1/2 - 3/4 800M3

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 Vacuum Breaker Repair Kit is a backflow repair kit designed for use with Watts 800M3 series backflow preventers. It is compatible with valve sizes from 1/2 in to 3/4 in and includes a bonnet O-ring. The manufacturer part number is 800M3-1/2-3/4 1st Check Kit.

Frequently Asked Questions

What is the Watts 800M3 vacuum breaker repair kit used for?

The Watts 800M3 vacuum breaker repair kit is used to service backflow preventers in the 800M3 series. It replaces worn internal components, including the bonnet O-ring, to restore proper sealing and prevent backflow contamination in potable water systems. This kit is suitable for commercial and residential plumbing applications.

What are the specifications of the Watts 800M3-1/2-3/4 1st check kit?

The Watts 800M3-1/2-3/4 1st check kit is compatible with valve sizes from 1/2 in to 3/4 in and fits the Watts 800M3 series backflow preventers. It includes a bonnet O-ring. The manufacturer part number is 800M3-1/2-3/4 1st Check Kit, and it is designed for first-check repair on 800M3 models.

Where to buy Watts backflow repair kits worldwide?

You can order the Watts 800M3 vacuum breaker repair kit from 3G Electric, a global industrial equipment distributor. We source and deliver this genuine Watts repair kit worldwide, handling full logistics and customs clearance. Contact us for availability and lead time; we provide reliable supply to any international destination.

How to install the Watts 800M3 repair kit?

To install the Watts 800M3 repair kit, first depressurize and drain the backflow preventer. Remove the bonnet and replace the old O-ring with the included bonnet O-ring. Reassemble the valve and test for leaks. Always follow the manufacturer's instructions for your specific 800M3 model to ensure proper sealing and compliance.

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

Related products

More from Watts

View all Watts parts
WATTS Backflow Preventer Repair Kits: Second Check Kit, 957-OSY 21/2/957-OSY3/957OSY4, 957/957RPDA, Repair Kit (MPN RK957/957RPDA-CK2-21/2-4)
Watts
WATTS Backflow Preventer Repair Kits: Second Check Kit, 957-OSY 21/2/957-OSY3/957OSY4, 957/957RPDA, Repair Kit (MPN RK957/957RPDA-CK2-21/2-4)
WATTS Backflow Preventer Repair Kit: Complete Rubber Parts Kit, 009-M1-QTS, 009-M1-QTS, Repair Kit, 009 (MPN RK 009 RT 3/4 - 1)
Watts
WATTS Backflow Preventer Repair Kit: Complete Rubber Parts Kit, 009-M1-QTS, 009-M1-QTS, Repair Kit, 009 (MPN RK 009 RT 3/4 - 1)
WATTS Backflow Preventer Repair Kits: First or Second Check Kit, LF719-QT-S, 2 in Compatible Valve Size (MPN RK 719-CK4 2)
Watts
WATTS Backflow Preventer Repair Kits: First or Second Check Kit, LF719-QT-S, 2 in Compatible Valve Size (MPN RK 719-CK4 2)
WATTS Backflow Preventer Repair Kits: First or Second Check Kit, LF719-QT-S, 719/LF719, RK-LF719 (MPN RK 719-CK4-3/4)
Watts
WATTS Backflow Preventer Repair Kits: First or Second Check Kit, LF719-QT-S, 719/LF719, RK-LF719 (MPN RK 719-CK4-3/4)
WATTS Backflow Preventer Repair Kits: Complete Rubber Parts Kit, 3/4 in Compatible Valve Size, 009M3 (MPN RK 009M3-RT 3/4)
Watts
WATTS Backflow Preventer Repair Kits: Complete Rubber Parts Kit, 3/4 in Compatible Valve Size, 009M3 (MPN RK 009M3-RT 3/4)
WATTS Relief Valve Repair Kit: Relief Valve Kit, LF909-DNRS-FS/LF909-DNRS-FS/LF909-DOSY-FS, 4-6 LF909, Repair Kit, 909 (MPN LFRK 909-RV 4-6)
Watts
WATTS Relief Valve Repair Kit: Relief Valve Kit, LF909-DNRS-FS/LF909-DNRS-FS/LF909-DOSY-FS, 4-6 LF909, Repair Kit, 909 (MPN LFRK 909-RV 4-6)
WATTS Backflow Preventer Repair Kits: First or Second Check Kit, LF709-NRS/LF709-NRS/LF709-OSY/LF709-OSY (MPN LFRK 709-CK4 2-1/2-3)
Watts
WATTS Backflow Preventer Repair Kits: First or Second Check Kit, LF709-NRS/LF709-NRS/LF709-OSY/LF709-OSY (MPN LFRK 709-CK4 2-1/2-3)
WATTS Vacuum Breaker Repair Kit: Vacuum Breaker Repair Kit, 34LF008PCQT34/1LF008PCQT1, 3/4 - 1 008, Repair Kit (MPN 008-3/4-1 Rubber Kit)
Watts
WATTS Vacuum Breaker Repair Kit: Vacuum Breaker Repair Kit, 34LF008PCQT34/1LF008PCQT1, 3/4 - 1 008, Repair Kit (MPN 008-3/4-1 Rubber Kit)