Zurn Wilkins 212-375ASTBG 2-1/2" RPZ Backflow Preventer | Stainless Body w/ Butterfly Valves

Zurn Wilkins 2-1/2" 375ASTBG RPZ Backflow Preventer | Stainless Steel & Butterfly Valves.

Product Overview:

The Zurn Wilkins 2-1/2" 375ASTBG RPZ Backflow Preventer is purpose-built to protect potable water systems in applications where a health hazard exists. With a compact 304L stainless steel body and supervised grooved butterfly valves, this reduced pressure zone assembly offers superior performance and reliability. It’s ideal for commercial and institutional systems that demand compliance, space efficiency, and low maintenance.

Features & Benefits:

• RPZ design with dual checks and relief valve for full backflow protection

• Space-saving short lay-length for tight mechanical rooms or vaults

• Durable stainless steel body with NSF-certified lead-free construction

• Supervised grooved butterfly valves allow shutoff monitoring

• In-line maintenance capability simplifies service and testing

• Retrofit-ready replacement for 300ASTR models

• Horizontal and vertical installation approved

Specifications:

• Size: 2-1/2"

• Body Material: 304L Stainless Steel

• Internals: NORYL™, stainless steel, EPDM seals, Buna-N O-rings

• Max Pressure: 175 PSI

• Test Pressure: 350 PSI

• Temp Rating: 140°F

• Ends: Grooved (AWWA C606) or Flanged (ANSI B16.1 Class 125)

• Certifications: ASSE 1013, AWWA C511/C550, UL®, FM®, CSA®, IAPMO®, NSF 61/372

Installation Tips:

• Install 12"–30" above grade with relief valve piped to an approved drain

• Maintain access around test ports and butterfly valve handles

• Avoid submerged or flood-prone areas

• Follow Zurn’s published maintenance guide and adjustment procedures

FAQs:

Q: What is an RPZ backflow preventer used for?
A: It prevents contaminated water from flowing backward into clean potable lines due to backsiphonage or backpressure.

Q: What does a supervised butterfly valve mean?
A: It features a position indicator or tamper switch to confirm valve status, essential for secure applications.

Q: Is it easy to maintain?
A: Yes, in-line servicing means you don’t have to remove the valve to inspect or replace components.