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Seasonal Pick Zurn Wilkins 4-350aosy 4" Double Check Valve Assembly (dcva) Os&y Lead-free Diy Kit [cC3P5H9Z]

$143.99 $460.99 -69%

4" Double Check Valve Assembly (DCVA) OS&Y Lead-Free The Seasonal Pick Zurn Wilkins 4-350aosy 4" Double Check Valve Assembly (dcva) Os&y Lead-free Diy Kit [cC3P5H9Z] is a high-quality backflow preventer designed to ensure the safety and purity of your potable water supply. This asse

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Seasonal Pick Zurn Wilkins 4-350aosy 4" Double Check Valve Assembly (dcva) Os&y Lead-free Diy Kit [cC3P5H9Z]

4" Double Check Valve Assembly (DCVA) OS&Y Lead-Free

The Seasonal Pick Zurn Wilkins 4-350aosy 4" Double Check Valve Assembly (dcva) Os&y Lead-free Diy Kit [cC3P5H9Z] is a high-quality backflow preventer designed to ensure the safety and purity of your potable water supply. This assembly is fully certified to meet stringent industry standards, including NSF/ANSI 372, ASSE® Listed 1015, and is compliant with the low-lead law. Its robust construction and reliable performance make it an ideal choice for protecting against both backsiphonage and backpressure of polluted water.

Key Features and Specifications

The 4-350AOSY features a full port open stem & yoke gate valves, ensuring maximum flow rates and easy maintenance. The main body and access cover are made of epoxy coated ductile iron (ASTM A 536 Grade 4), providing durability and corrosion resistance. The seat ring and check valve are made of NORYL™, while the stem is constructed from stainless steel (ASTM A 276), ensuring long-lasting performance. The seat disc elastomers are made of EPDM, offering excellent resistance to chemicals and heat. This assembly is also equipped with compound type checks, making it accessible for maintenance without removing the device from the line.

Applications and Benefits

The Zurn Wilkins 4-350AOSY is designed for installation on potable water lines, providing protection against health hazards caused by contaminated water. Its compact design and short lay length make it easy to replace, saving time and effort during installation or maintenance. The assembly is available in various sizes and connection types, including flanged, grooved, and grooved X flanged, to accommodate different installation requirements. With its comprehensive list of certifications and compliance standards, the 4-350AOSY is a reliable and cost-effective solution for ensuring the safety of your water supply.

What Our Customers Say

January 29, 2026

Absolutely no complaints!

This is a really good and a very, very, very, very useful tool.

- Anwen O..

January 29, 2026

Absolutely no complaints!

I'm happy with this. It is very, very, very, very great.

- Llyr B..

January 29, 2026

Absolutely no complaints!

This is a very smart and a very, very efficient tool.

- Bethan N..

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