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

3G Electric
Watts ARK HMB/BLT VT 2.5-3 Backflow Preventer Repair Kit - Repair Kits & Parts for Watts Backflow Preventers
WattsRepair Kits & Parts for Watts Backflow Preventers

Watts ARK HMB/BLT VT 2.5-3 Backflow Preventer Repair Kit

The WATTS Backflow Preventer Repair Kit (SKU 3G-OTH-436866) is a repair kit designed for Watts backflow preventers. It is compatible with valve sizes of 2-1/2 in to 3 in and is compatible with Series 5000SS and Mfr…

SKU 3G-OTH-436866

Also listed as: ARKHMBBLTVT253 · ARK HMB BLT VT 2 5 3 · ARK-HMB-BLT-VT-2-5-3

Brand
Watts
Item
ARK HMB/BLT VT 2.5-3 Backflow Preventer Repair Kit
Part Number
ARK HMB/BLT VT 2.5-3
Category
Repair Kits & Parts for Watts Backflow Preventers
Available to Order
Also known as:ARK HMB/BLT VT 2.5-3Watts
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
ARK HMB/BLT VT 2.5-3
Type
6AUW6
Compatible Valve Size
2-1/2 in to 3 in
Compatible with Series
5000SS
Compatible with Mfr. Model No.
6000HMB

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 Backflow Preventer Repair Kit (SKU 3G-OTH-436866) is a repair kit designed for Watts backflow preventers. It is compatible with valve sizes of 2-1/2 in to 3 in and is compatible with Series 5000SS and Mfr. Model No. 6000HMB. The manufacturer part number is ARK HMB/BLT VT 2.5-3.

Frequently Asked Questions

What is the Watts backflow preventer repair kit used for?

This repair kit restores sealing and internal function in Watts backflow preventers. It is used in commercial and industrial water systems to maintain backflow protection, prevent contamination, and extend equipment life across plumbing, irrigation, and process water applications.

What are the specifications of the Watts backflow preventer repair kit?

The kit (MPN ARK HMB/BLT VT 2.5-3) fits valve sizes 2-1/2 in to 3 in. It is compatible with Watts Series 5000SS and Model 6000HMB. The part number is 6000HMB Hydrant BFP. It includes seals and components for a complete rebuild of the backflow preventer assembly.

Where to buy Watts backflow preventer repair kits worldwide?

3G Electric supplies Watts backflow preventer repair kits worldwide. As a global industrial sourcing partner, we handle logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this kit or other Watts repair parts.

How to install a Watts backflow preventer repair kit?

Installation requires depressurizing the system, disassembling the valve body, and replacing all internal seals and springs per the manufacturer's instructions. Always follow local plumbing codes and use proper tools. For specific torque values or orientation, consult the Watts service manual for Series 5000SS or 6000HMB.

Used in

Common applications for Watts
Commercial plumbing – Watts standard capacity water pressure regulators (3/8 LF 26AB) for stabilizing incoming water pressure
Industrial steam systems – Watts 152A series steam pressure regulators for pressure reduction in process and heating lines
Cross-connection control – Watts 757 double check backflow preventers for commercial and industrial water supply protection
Boiler safety – Watts ASME Section XIII temperature and pressure relief valves for overpressure protection in heating systems
Hydronic heating – Watts CP16 pilot-operated pressure regulators for maintaining consistent pressure in steam or water loops
Water hammer mitigation – Watts LF15M2-A water hammer arrestors for absorbing surges in quick-closing valve applications
Not sure this is the right part? Photo-identify it

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

More from Watts

View all Watts parts
Repair kit for Watts Series 909 backflow preventers, compatible with valve sizes 1-1/4 in to 2 in. Includes cover O-ring. For use with models 818DD1, 818DD7, 818DE2, and LF909M1
Watts
Repair kit for Watts Series 909 backflow preventers, compatible with valve sizes 1-1/4 in to 2 in. Includes cover O-ring. For use with models 818DD1, 818DD7, 818DE2, and LF909M1
Watts
Watts
This repair kit is designed for use with Watts SS009 series backflow preventers. It includes a check assembly for servicing the second check valve. Compatible with 1-inch valve sizes, the kit is identified by manufacturer part number RK SS009-CK2 1 and type 793HG5
Repair kit for Watts 709 and RK-LF709 series backflow preventers. Includes cover O-ring. Compatible with 4-inch valve size. Used for replacing first or second check assembly in commercial and industrial water systems
Watts
Repair kit for Watts 709 and RK-LF709 series backflow preventers. Includes cover O-ring. Compatible with 4-inch valve size. Used for replacing first or second check assembly in commercial and industrial water systems
Watts
Watts
Repair kit for Watts backflow preventers, includes cover O-ring and relief valve spring. Compatible with valve sizes 1/4 in to 1/2 in and with Watts Series RK-LF009 and model LF009. Used to restore relief valve function in backflow prevention assemblies
Watts
Watts
Repair kit for Watts 007 series backflow preventers. Includes cover O-ring. Compatible with 1/2 in valve size and model 007. Used to replace first or second check assembly in potable water systems
Repair kit for Watts backflow preventers, compatible with Series RK-774 and Model 774. Includes a cam check with a check O-ring. Fits valve sizes 2-1/2 in to 4 in. Used to replace worn internal components in backflow prevention assemblies
Watts
Repair kit for Watts backflow preventers, compatible with Series RK-774 and Model 774. Includes a cam check with a check O-ring. Fits valve sizes 2-1/2 in to 4 in. Used to replace worn internal components in backflow prevention assemblies
Repair kit for Watts 919 series backflow preventers. Includes a relief valve stem O-ring. Compatible with 1-inch valve sizes and model 919. Used to replace worn rubber parts in backflow preventers for maintaining proper sealing
Watts
Repair kit for Watts 919 series backflow preventers. Includes a relief valve stem O-ring. Compatible with 1-inch valve sizes and model 919. Used to replace worn rubber parts in backflow preventers for maintaining proper sealing
This repair kit is for Watts backflow preventers, compatible with the 009M2 model and RK-009 series. It includes an upper stem O-ring and is designed for a 2-inch valve size. The kit is used to replace worn internal components, helping to restore proper valve function in water systems
Watts
This repair kit is for Watts backflow preventers, compatible with the 009M2 model and RK-009 series. It includes an upper stem O-ring and is designed for a 2-inch valve size. The kit is used to replace worn internal components, helping to restore proper valve function in water systems

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first