Description
Zurn Wilkins 4″ 375ASTBG RPZ Backflow Preventer | Stainless Steel & Butterfly Valves.
Product Overview:
Designed for mid-sized commercial systems, the Zurn Wilkins 4″ 375ASTBG RPZ Backflow Preventer protects against serious contamination from backpressure and backsiphonage. Its stainless steel body, supervised grooved butterfly valves, and in-line serviceability make it an ideal solution for healthcare facilities, schools, and commercial buildings.
Features & Benefits:
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Dual check valves and relief valve offer full RPZ protection
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Space-conscious design with short body length
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304L stainless steel body resists corrosion and scaling
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NSF-certified for lead-free potable water systems
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Supervised butterfly valves ensure visible shutoff status
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Easy access for in-line maintenance
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Complies with vertical and horizontal installation codes
Specifications:
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Size: 4″
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Body & Cover: 304L Stainless Steel
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Max Pressure: 175 PSI
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Test Pressure: 350 PSI
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Max Temp: 140°F
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End Connections: Grooved or Flanged
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Standards: ASSE 1013, AWWA C511/C550, UL®, FM®, CSA®, IAPMO®, NSF 61 & 372
Installation Tips:
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Mount between 12″–30″ above floor level
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Pipe relief valve to visible and approved drainage
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Ensure clearances for test port access and valve movement
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Avoid vaults subject to water accumulation
FAQs:
Q: Can this assembly be installed vertically?
A: Yes, it is approved for both vertical and horizontal configurations.
Q: What systems typically require a 4″ RPZ?
A: Ideal for commercial plumbing systems, irrigation lines, and service mains.
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