Zurn Wilkins 4-375AST 4" RPZ Backflow Preventer | Stainless Body NRS Flanged

Zurn Wilkins 4" 375AST RPZ Backflow Preventer | Stainless Steel, NRS Gate Valves.

Product Overview:

The Zurn Wilkins 4" 375AST RPZ Backflow Preventer is designed to protect potable water systems in environments where health hazards exist. With a corrosion-resistant stainless steel body and non-rising stem gate valves, this RPZ backflow assembly delivers outstanding flow capacity, reliability, and low maintenance requirements in commercial and institutional applications.

Features & Benefits:

• Backflow protection for systems with potential health hazards

• Durable 304L stainless steel body

• Short body length for compact installations

• NRS gate valves maximize space and safety

• Certified for potable systems – lead-free and NSF compliant

• Modular check and relief valve assemblies simplify servicing

• Approved for horizontal and vertical installations

Specifications:

• Size: 4"

• Body: 304L Stainless Steel

• Components: NORYL™, EPDM, Stainless Steel

• Working Pressure: 175 PSI

• Test Pressure: 350 PSI

• Max Temp: 140°F

• End Connections: Grooved or Flanged

• Certifications: ASSE 1013, NSF 61/372, FM®, UL®, CSA®, IAPMO®

Installation Tips:

• Install above ground with a minimum clearance of 12"

• Allow adequate space for future testing and repairs

• Never install in a location subject to flooding or submersion

• Secure all drain lines from the relief valve to a proper discharge location

• Follow the manufacturer's maintenance schedule

FAQs:

Q: Is this RPZ model compliant with current plumbing codes?
A: Yes, it meets or exceeds ASSE, NSF, and local backflow code standards.

Q: Can I replace older RPZ models with this unit?
A: Yes, this assembly is retrofit-ready and compatible with older models.

Q: Does the unit come with test cocks?
A: Yes, factory-installed test cocks are included for certification testing.