Description

Zurn Wilkins 10″ 350AST Double Check Backflow Preventer — 304L Stainless, 250 PSI

The Zurn Wilkins 350AST Double Check Backflow Preventer protects potable water systems from back siphonage and backpressure in low‑hazard applications. Its 304L stainless‑steel body and covers resist corrosion and reduce weight versus iron assemblies. The Compound Check design delivers high flow with low pressure loss. This 10″ assembly includes test cocks and a UL/FM shutoff valve marked “MDL48” (2019) on at least one end, with grooved × flanged end configuration as shown in photos.

Key Specifications

• Manufacturer: Zurn Wilkins
• Model: 350AST
• Size: 10″ nominal
• Assembly Type: Double Check Valve Assembly (DCA)
• Body / Covers: 304L stainless steel
• Compliance: ASSE 1015; NSF/ANSI/CAN 61 & 372 (lead‑free)
• Orientation: Horizontal or vertical (per OEM installation instructions)
• End Connections: Grooved × Flanged (verified by photos)
• Shutoff Valve: MDL48, UL/FM, 250 PSI, year 2019 (cast markings visible)
• Pressure Rating: 250 PSI (cast)

Included & Condition

• Included: 10″ Zurn Wilkins 350AST assembly as shown. End hardware includes one grooved coupling and one flanged end as pictured: shutoff valve with MDL48 casting visible.
• Condition: New; light storage/handling marks possible.
• Serial / Tag: 26017A

Applications

• Municipal & commercial potable water distribution
• Industrial water service where DCA is permitted

• Low health‑hazard cross‑connection protection

Documentation (Click to View PDFs)

• 📑 Zurn Wilkins 350AST Specification Sheet (PDF)
• 📑 Zurn 350AST Installation & Maintenance (PDF)

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