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Watts 3/4 9DS-M2 Continuous Pressure Dual Check Backflow Preventer - Continuous Pressure Dual Check Backflow Preventers
WattsContinuous Pressure Dual Check Backflow Preventers

Watts 3/4 9DS-M2 Continuous Pressure Dual Check Backflow Preventer

The WATTS 9D is a continuous pressure dual check backflow preventer in a 3/4 in brass body, rated for 18.7 gpm flow. As a Watts product, it is designed to prevent reverse flow in potable water lines under continuous…

SKU 3G-OTH-430230

Also listed as: 349DSM2 · 3 4 9DS M2 · 3-4-9DS-M2

Brand
Watts
Item
3/4 9DS-M2 Continuous Pressure Dual Check Backflow Preventer
Part Number
3/4 9DS-M2
Category
Continuous Pressure Dual Check Backflow Preventers
Available to Order
Also known as:3/4 9DS-M2Watts
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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
3/4 9DS-M2
Type
Brass
Overall Lg
4.81 in
Pipe Size
3/4 in
Flow Rate
18.7 gpm

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 in a 3/4 in brass body, rated for 18.7 gpm flow. As a Watts product, it is designed to prevent reverse flow in potable water lines under continuous pressure. 3G Electric interprets demand and delivers this genuine industrial part across 14 departments, with specialist depth in combustion, pumps and controls as an authorised distributor.

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 backflow preventer used for?

The Watts 9D is a continuous-pressure dual check backflow preventer used in residential and commercial plumbing to prevent contaminated water from flowing backward into the potable water supply. It is typically installed on service lines or branch lines where low-hazard cross-connections exist.

What are the specifications of the Watts 9D backflow preventer?

The Watts 9D has a 3/4 in pipe size, a flow rate of 18.7 gpm, and an overall length of 4.81 in. It is made of brass and is designed for continuous pressure applications. The manufacturer part number is 3/4 9DS-M2.

Where to buy the Watts 9D backflow preventer worldwide?

3G Electric supplies the Watts 9D backflow preventer worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on this brass dual check valve.

How to install a Watts 9D dual check backflow preventer?

Install the Watts 9D in a horizontal or vertical position with the flow arrow pointing downstream. Ensure the device is accessible for testing and maintenance. Use thread sealant on the inlet and outlet connections. Always follow local plumbing codes and the manufacturer's instructions for proper installation.

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
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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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Compatible alternatives & equivalents

Cross-referenced by specification & description
The Watts LF7 is a dual check backflow preventer for potable water systems, featuring a 3/8 in pipe size with FNPT x FNPT connections. It has a flow rate of 10 gpm and an overall length of 2.88 in. This device is used to protect drinking water supplies from contamination due to backflow in branch lines serving fixtures such as hose bibbs or boiler fill valves
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The Watts LF7 is a dual check backflow preventer for potable water systems, featuring a 3/8 in pipe size with FNPT x FNPT connections. It has a flow rate of 10 gpm and an overall length of 2.88 in. This device is used to protect drinking water supplies from contamination due to backflow in branch lines serving fixtures such as hose bibbs or boiler fill valves
This dual check backflow preventer is designed for carbonated water lines in beverage dispensing systems. It features 3/8 inch FNPT x FNPT connections, a flow rate of 2.5 gpm, and an overall length of 3 inches
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This dual check backflow preventer is designed for carbonated water lines in beverage dispensing systems. It features 3/8 inch FNPT x FNPT connections, a flow rate of 2.5 gpm, and an overall length of 3 inches
Watts 1/2 LFN9-C dual check backflow preventer for potable water systems. Features 1/2 inch FNPT x FNPT connections, 7 gpm flow rate, and 2.38 inch overall length. Used to prevent backflow in cross-connections such as irrigation or boiler feed lines
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Watts 1/2 LFN9-C dual check backflow preventer for potable water systems. Features 1/2 inch FNPT x FNPT connections, 7 gpm flow rate, and 2.38 inch overall length. Used to prevent backflow in cross-connections such as irrigation or boiler feed lines
Watts LF7R dual check backflow preventer for potable water systems. Features 3/4 in pipe size with True Union FNPT connections, 15.5 gpm flow rate, brass body, and EPDM seals. Used in residential and commercial plumbing to prevent backflow contamination
Watts
Watts LF7R dual check backflow preventer for potable water systems. Features 3/4 in pipe size with True Union FNPT connections, 15.5 gpm flow rate, brass body, and EPDM seals. Used in residential and commercial plumbing to prevent backflow contamination

More from Watts

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Brass dual check backflow preventer with atmospheric vent for continuous pressure service. 1/4 in FNPT x FNPT connections, 7 gpm flow rate. Used in potable water systems to prevent backflow contamination
Watts
Brass dual check backflow preventer with atmospheric vent for continuous pressure service. 1/4 in FNPT x FNPT connections, 7 gpm flow rate. Used in potable water systems to prevent backflow contamination

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