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Watts Dual Check w Atmospheric Vent: 9D, 1/2 in Pipe Size, FNPT x FNPT, 18.7 gpm Flow Rate - Continuous Pressure Dual Check Backflow Preventers
WattsContinuous Pressure Dual Check Backflow Preventers

Watts Dual Check w Atmospheric Vent: 9D, 1/2 in Pipe Size, FNPT x FNPT, 18.7 gpm Flow Rate

The WATTS 9D is a continuous pressure dual check backflow preventer with an atmospheric vent, featuring a 1/2 in pipe size and FNPT x FNPT connections. It has a flow rate of 18.7 gpm and is constructed from brass…

SKU 3G-OTH-430229

Also listed as: 9DM312 · 9D M3 1 2 · 9D-M3-1-2

Brand
Watts
Item
Dual Check w Atmospheric Vent: 9D, 1/2 in Pipe Size, FNPT x FNPT, 18.7 gpm Flow Rate
Category
Continuous Pressure Dual Check Backflow Preventers
Available to Order
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Technical specs
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

Watts
Manufacturer Part Number
9D-M3-1/2"
Type
FNPT x FNPT, Brass
Pipe Size
1/2 in
Flow Rate
18.7 gpm
Connection Type
FNPT x FNPT

Technical Documents

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Watts Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The WATTS 9D is a continuous pressure dual check backflow preventer with an atmospheric vent, featuring a 1/2 in pipe size and FNPT x FNPT connections. It has a flow rate of 18.7 gpm and is constructed from brass (MPN 9D-M3-1/2").

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the WATTS 9D dual check backflow preventer used for?

The WATTS 9D is a continuous pressure dual check backflow preventer with an atmospheric vent, used to protect potable water supplies from contamination due to backflow. It is suitable for residential and commercial plumbing systems where a compact, reliable backflow solution is required.

What are the specifications of the WATTS 9D-M3-1/2?

The WATTS 9D-M3-1/2 has a 1/2 in pipe size, FNPT x FNPT connections, a flow rate of 18.7 gpm, and is constructed from brass. It is designed for continuous pressure applications and includes an atmospheric vent for added safety.

Where to buy the WATTS 9D backflow preventer worldwide?

3G Electric supplies the WATTS 9D backflow preventer to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this brass dual check valve.

How to install a WATTS 9D dual check valve?

Install the WATTS 9D in a horizontal or vertical position with the flow arrow pointing downstream. Ensure the atmospheric vent is unobstructed and the valve is accessible for testing. Use pipe thread sealant on the FNPT connections and test per local codes after installation.

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 continuous pressure dual check 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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