Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
Watts 800M4 1 1st Check Kit, 1 in, Repair Kit for Backflow Preventers - Repair Kits & Parts for Watts Backflow Preventers
WattsRepair Kits & Parts for Watts Backflow Preventers

Watts 800M4 1 1st Check Kit, 1 in, Repair Kit for Backflow Preventers

The WATTS Vacuum Breaker Repair Kit: Check Repair Kit (SKU 3G-OTH-436689) is a repair kit for Watts backflow preventers, specifically designed for the 800M4 series. It includes a check spring and is compatible with a…

SKU 3G-OTH-436689

Also listed as: 800M411stCheckKit · 800M4-1-1st-Check-Kit

Brand
Watts
Item
800M4 1 1st Check Kit, 1 in, Repair Kit for Backflow Preventers
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 — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Watts
Manufacturer Part Number
800M4 1 1st Check Kit
Type
36JD33/793HT9/809GD1/809GD2, 1 800M4, Repair Kit
Includes
Check Spring
Compatible Valve Size
1 in
Compatible with Series
800M4
Compatible with Mfr. Model No.
1 800M4

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: Check Repair Kit (SKU 3G-OTH-436689) is a repair kit for Watts backflow preventers, specifically designed for the 800M4 series. It includes a check spring and is compatible with a 1-inch valve size, corresponding to manufacturer part number 800M4 1 1st Check Kit and model 1 800M4.

Frequently Asked Questions

What is the Watts 800M4 vacuum breaker repair kit used for?

The Watts 800M4 vacuum breaker repair kit is used to service backflow preventers in the 800M4 series. It replaces worn check components to maintain proper backflow protection in commercial and industrial water systems, ensuring compliance with cross-connection control regulations.

What are the specifications of the Watts 800M4 check repair kit?

The Watts 800M4 check repair kit includes a check spring and is compatible with a 1-inch valve size. It fits the 800M4 series and corresponds to manufacturer part number 800M4 1 1st Check Kit and model 1 800M4. It is also compatible with part number 1 LF800M4-FR.

Where to buy Watts backflow repair kits worldwide?

3G Electric supplies Watts backflow repair kits worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time on the Watts 800M4 check repair kit.

How to install a Watts 800M4 check repair kit?

To install the Watts 800M4 check repair kit, first depressurize and isolate the backflow preventer. Remove the bonnet and internal check assembly, replace the old check spring with the new one from the kit, and reassemble. Always follow the manufacturer's instructions for proper torque and testing.

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 →

Compatible alternatives & equivalents

Cross-referenced by specification & description
Repair kit for Watts 800M3 series backflow preventers. Includes bonnet O-ring. Compatible with valve sizes 1/2 in to 3/4 in. Used to replace worn internal components and restore sealing in potable water systems
Watts
Repair kit for Watts 800M3 series backflow preventers. Includes bonnet O-ring. Compatible with valve sizes 1/2 in to 3/4 in. Used to replace worn internal components and restore sealing in potable water systems
Repair kit for servicing the first check valve of Watts 800M2 series backflow preventers. Compatible with valve sizes from 1/2 in to 1 in. Includes bonnet O-ring. Used in backflow prevention systems for water lines
Watts
Repair kit for servicing the first check valve of Watts 800M2 series backflow preventers. Compatible with valve sizes from 1/2 in to 1 in. Includes bonnet O-ring. Used in backflow prevention systems for water lines
Repair kit for Watts Series 800M4 backflow preventers. Includes float vent disc assembly with vent float seal and spring. Compatible with 1-inch valve sizes and model 1 800M4. Used to service vacuum breakers in water systems
Watts
Repair kit for Watts Series 800M4 backflow preventers. Includes float vent disc assembly with vent float seal and spring. Compatible with 1-inch valve sizes and model 1 800M4. Used to service vacuum breakers in water systems
This repair kit is for servicing Watts Series 800 backflow preventers. It includes a check disc assembly (disc and holder) and is compatible with valve sizes from 1/2 in to 1 in. Used to restore check-valve function in vacuum breakers, maintaining backflow protection in plumbing systems
Watts
This repair kit is for servicing Watts Series 800 backflow preventers. It includes a check disc assembly (disc and holder) and is compatible with valve sizes from 1/2 in to 1 in. Used to restore check-valve function in vacuum breakers, maintaining backflow protection in plumbing systems
This repair kit includes a check assembly for servicing Watts Series 008 backflow preventers. Compatible with valve sizes 3/4 in to 1 in. Used to replace worn internal components in commercial and residential water systems to maintain backflow protection
Watts
This repair kit includes a check assembly for servicing Watts Series 008 backflow preventers. Compatible with valve sizes 3/4 in to 1 in. Used to replace worn internal components in commercial and residential water systems to maintain backflow protection
This repair kit is designed for servicing Watts Series 008 backflow preventers. It includes a vent O-ring and is compatible with valve sizes from 3/4 in to 1 in. The kit is used to replace worn seals and maintain backflow protection in water systems
Watts
This repair kit is designed for servicing Watts Series 008 backflow preventers. It includes a vent O-ring and is compatible with valve sizes from 3/4 in to 1 in. The kit is used to replace worn seals and maintain backflow protection in water systems

More from Watts

View all Watts parts →
This repair kit includes a second check module for Watts backflow preventers. It is compatible with valve sizes 2-1/2 in to 4 in and fits Series 957 and 957RPDA models. Used to restore check-valve function in backflow prevention assemblies
Watts
This repair kit includes a second check module for Watts backflow preventers. It is compatible with valve sizes 2-1/2 in to 4 in and fits Series 957 and 957RPDA models. Used to restore check-valve function in backflow prevention assemblies
Repair kit for the first check valve in Watts 800M4 series pressure vacuum breakers. Includes bonnet O-ring. Compatible with valve sizes 1/2 in to 3/4 in and model 1/2 - 3/4 800M4. Used to service backflow preventers in water systems
Watts
Repair kit for the first check valve in Watts 800M4 series pressure vacuum breakers. Includes bonnet O-ring. Compatible with valve sizes 1/2 in to 3/4 in and model 1/2 - 3/4 800M4. Used to service backflow preventers in water systems
This repair kit includes two disc assemblies for restoring sealing performance in Watts Series 009 backflow preventers. Compatible with valve sizes 3/4 to 1 inch and model 009-M1-QTS. Used for maintenance in water supply systems to ensure backflow protection
Watts
This repair kit includes two disc assemblies for restoring sealing performance in Watts Series 009 backflow preventers. Compatible with valve sizes 3/4 to 1 inch and model 009-M1-QTS. Used for maintenance in water supply systems to ensure backflow protection
Repair kit for Watts backflow preventers, includes disc holder. Compatible with 2-inch valve sizes in Series RK-LF719 and Model LF719. Used for servicing first or second check valves in cross-connection control systems
Watts
Repair kit for Watts backflow preventers, includes disc holder. Compatible with 2-inch valve sizes in Series RK-LF719 and Model LF719. Used for servicing first or second check valves in cross-connection control systems
Repair kit for Watts 009 series backflow preventers. Includes seat. Compatible with 3/4-inch valve sizes, models 3/4 009M2 and LF009M2. Used to restore relief-valve function in backflow prevention assemblies
Watts
Repair kit for Watts 009 series backflow preventers. Includes seat. Compatible with 3/4-inch valve sizes, models 3/4 009M2 and LF009M2. Used to restore relief-valve function in backflow prevention assemblies
Repair kit for first or second check valves in Watts backflow preventers. Includes cover O-ring. Compatible with 3/4 in valve size and models LF719, 719/LF719, and RK-LF719 series
Watts
Repair kit for first or second check valves in Watts backflow preventers. Includes cover O-ring. Compatible with 3/4 in valve size and models LF719, 719/LF719, and RK-LF719 series
Repair kit for Watts 009M3 backflow preventers, compatible with 3/4 in valve size. Includes two seat O-rings for restoring sealing function in backflow prevention assemblies
Watts
Repair kit for Watts 009M3 backflow preventers, compatible with 3/4 in valve size. Includes two seat O-rings for restoring sealing function in backflow prevention assemblies
This repair kit is designed for servicing Watts Series 909 and model 4-6 LF909 backflow preventers. It includes an RV disc assembly and is compatible with valve sizes from 4 to 6 inches. Used in commercial and industrial water systems to replace worn relief valve components and maintain backflow protection
Watts
This repair kit is designed for servicing Watts Series 909 and model 4-6 LF909 backflow preventers. It includes an RV disc assembly and is compatible with valve sizes from 4 to 6 inches. Used in commercial and industrial water systems to replace worn relief valve components and maintain backflow protection