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Watts Backflow Preventer: SD-3, 3/8 in Pipe Size, FNPT x FNPT, 2.5 gpm Flow Rate - Carbonated Water Line Dual Check Backflow Preventers
WattsCarbonated Water Line Dual Check Backflow Preventers

Watts Backflow Preventer: SD-3, 3/8 in Pipe Size, FNPT x FNPT, 2.5 gpm Flow Rate

The WATTS SD-3 is a carbonated water line dual check backflow preventer with a 3/8 in pipe size and FNPT x FNPT connections. It has a flow rate of 2.5 gpm and an overall length of 3 in (MPN 3/8 SD3-FN).

SKU 3G-OTH-428547

Also listed as: 38SD3FN · 3 8 SD3 FN · 3-8-SD3-FN

Brand
Watts
Item
Backflow Preventer: SD-3, 3/8 in Pipe Size, FNPT x FNPT, 2.5 gpm Flow Rate
Category
Carbonated Water Line 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
3/8 SD3-FN
Type
FNPT x FNPT
Overall Lg
3 in
Pipe Size
3/8 in
Flow Rate
2.5 gpm
Connection Type
FNPT x FNPT

Technical Documents

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

Product Description

The WATTS SD-3 is a carbonated water line dual check backflow preventer with a 3/8 in pipe size and FNPT x FNPT connections. It has a flow rate of 2.5 gpm and an overall length of 3 in (MPN 3/8 SD3-FN).

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 a WATTS SD-3 backflow preventer used for?

The WATTS SD-3 is a dual check backflow preventer designed for carbonated water lines. It protects potable water supplies from contamination caused by backflow in beverage dispensing systems, soda fountains, and similar food-service applications.

What are the specifications of the WATTS SD-3 backflow preventer?

The WATTS SD-3 has a 3/8 in pipe size with FNPT x FNPT connections, a flow rate of 2.5 gpm, and an overall length of 3 in. It is a carbonated water line dual check backflow preventer, model number 3/8 SD3-FN.

Where to buy a WATTS SD-3 backflow preventer worldwide?

3G Electric supplies the WATTS SD-3 backflow preventer to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this carbonated water line dual check valve.

How to install a WATTS SD-3 backflow preventer?

Install the WATTS SD-3 in a horizontal or vertical position with flow direction matching the arrow on the body. Use thread sealant on the FNPT connections and ensure downstream pressure does not exceed upstream pressure. Test annually per local codes.

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 carbonated water line 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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