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ZURNZurn Reduced-Pressure Zone Backflow Detectors

ZURN 4-350ASTDA Reduced-Pressure Zone Backflow Detector

The ZURN 350ASTDA is a reduced-pressure zone backflow detector, part of the Zurn brand. This model features a 4-inch pipe size with flange connections and an OSY gate valve shut-off valve, constructed from stainless…

SKU 3G-OTH-440276

Also listed as: 4350ASTDA · 4 350ASTDA

Brand
ZURN
Item
4-350ASTDA Reduced-Pressure Zone Backflow Detector
Category
Zurn Reduced-Pressure Zone Backflow Detectors
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Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

ZURN
Manufacturer Part Number
4-350ASTDA
Type
Flange, Stainless Steel
Pipe Size
4 in
Connection Type
Flange
Shut-Off Valve Type
OSY Gate Valve

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

Product Description

The ZURN 350ASTDA is a reduced-pressure zone backflow detector, part of the Zurn brand. This model features a 4-inch pipe size with flange connections and an OSY gate valve shut-off valve, constructed from stainless steel. It is identified by manufacturer part number 4-350ASTDA.

Frequently Asked Questions

What is the ZURN 350ASTDA backflow preventer used for?

The ZURN 350ASTDA is a reduced-pressure zone backflow detector used in commercial and industrial water systems to prevent contaminated water from flowing backward into the potable supply. It is commonly installed on fire sprinkler systems and high-hazard cross-connections where continuous water quality protection is required.

What are the specifications of the ZURN 4-350ASTDA?

The ZURN 4-350ASTDA has a 4-inch pipe size with flange connections and an OSY gate valve shut-off valve. It is constructed from stainless steel and is part of the Zurn reduced-pressure zone backflow detector series. The manufacturer part number is 4-350ASTDA.

Where to buy the ZURN 350ASTDA worldwide?

3G Electric supplies the ZURN 350ASTDA backflow preventer worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your site. Contact our team for availability and a quote tailored to your location and project requirements.

How to install a ZURN reduced-pressure zone backflow detector?

Install the ZURN 350ASTDA in a horizontal position with adequate clearance for testing and maintenance. Ensure the flange connections are properly aligned and gasketed. Always follow local plumbing codes and the manufacturer's instructions. After installation, test the device with a calibrated gauge to verify proper operation.

Used in

Common applications for ZURN
Commercial restrooms — ZURN AquaVantage® automatic flush valves (ZER6000AV series) for water-efficient toilet flushing
Institutional kitchens — ZURN cast iron floor drains (ZN415 series) for heavy-duty drainage in food preparation areas
Industrial washdown areas — ZURN height-adjustable PVC floor drains (EZ1 series) for chemical-resistant drainage
Hospital patient rooms — ZURN dome strainers (P1910 series) for floor sink drainage in sanitary environments
Office building maintenance — ZURN chrome-plated brass P-traps (ZR365B-PC) for sink trap replacements
Urinal retrofit projects — ZURN ZTR sensor flush valve retrofit kits (ZTR6203 series) for upgrading manual urinal flush valves

ZURN Products

3G Electric supplies ZURN zurn reduced-pressure zone backflow detectors. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Double check backflow preventer with 6-inch pipe size and flange x flange connections. Features NRS gate valve shut-off and overall length of 43.5 inches. Used in commercial and industrial water systems to prevent reverse flow contamination in fire sprinkler, irrigation, and process water applications
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Double check backflow preventer with 2 1/2 in pipe size and flange x flange connections. Includes NRS gate valve shut-off. Designed for operating temperatures from 33°F to 140°F. Used in commercial and industrial plumbing systems to prevent backflow of contaminated water into potable water supplies
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Double check backflow preventer with 2 1/2 in pipe size and flange x flange connections. Includes NRS gate valve shut-off. Designed for operating temperatures from 33°F to 140°F. Used in commercial and industrial plumbing systems to prevent backflow of contaminated water into potable water supplies
The ZURN 350AST is an 8-inch double check backflow preventer with flange x flange connections and NRS gate valve shut-off valves. It has an overall length of 52.75 inches. This assembly is used in water supply systems to prevent reverse flow of contaminated water into the potable water supply, suitable for commercial and industrial applications such as fire sprinkler systems and irrigation lines
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The ZURN 350AST is an 8-inch double check backflow preventer with flange x flange connections and NRS gate valve shut-off valves. It has an overall length of 52.75 inches. This assembly is used in water supply systems to prevent reverse flow of contaminated water into the potable water supply, suitable for commercial and industrial applications such as fire sprinkler systems and irrigation lines

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Reduced-pressure zone backflow detector assembly with 6-inch pipe size and flange connections. Constructed of stainless steel with an outside stem and yoke (OSY) gate valve shut-off. Used in commercial water systems to prevent backflow contamination in potable water supplies
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This reduced-pressure zone backflow detector features a stainless steel body and flange connections for 4-inch piping. It is equipped with an OSY gate valve shut-off. Used in water systems to prevent reverse flow and protect potable water supplies
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