The Wilkins WXTP-75V is a vertical water thermal expansion tank designed to protect potable water systems from pressure increases caused by thermal expansion, ensuring system safety and compliance with plumbing codes.

Key Specifications:

• Connection Type: 1 Inch FNPT
• Tank Volume & Acceptance Volume: 20 gal total, 8.0 gal acceptance
• Maximum Supply Pressure: 80 PSIG
• Pre-charge Pressure: 40 PSI factory setting
• Notable Certifications: NSF/ANSI 61 & 372

Other Related Variants:

• WXTP-50V: 50 liter (14 gal) version
• WXTP-120V: 120 liter (32 gal) version
• WXTP-165V: 165 liter (44 gal) version with 1 1/4 Inch connection

Materials:

• Outer shell: High grade steel
• Coating: Epoxy finish
• Connection: Stainless steel
• Bladder: FDA-approved butyl rubber

Typical Installation:

Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted on the cold water supply and at least 18 inches from the cold water inlet to the heater. If incoming water pressure is above 40 PSI, the maximum allowable pre-charge in this expansion tank is 80 PSI. A properly sized pressure relief valve set at a maximum of 150 PSI must also be installed in the system. For installations that have a supply pressure above 80 PSI, a properly sized pressure reducing valve should be installed on the system.

Standards Compliance:

NSF/ANSI/CAN 61; NSF/ANSI 372; ANSI B1.20.1

Features & Benefits:

• System Protection: Protects potable water systems from dangerous pressure increases caused by thermal expansion, keeping pressure below relief valve settings.
• Durable Construction: Steel shell with epoxy coating and FDA-approved butyl rubber bladder prevents water contact with shell interior for long-lasting performance.
• Adjustable Pre-charge: Schrader valve allows for easy air pre-charge adjustment to match system requirements and optimize tank performance.
• Lead-Free Certified: Certified to NSF/ANSI 372 with 0.25% maximum weighted average lead content, ensuring safe potable water applications.

FAQ

Q: What water heater capacity does the Zurn WXTP-75V support?

A: The WXTP-75V supports water heaters from 400 to 500 gallons at 40-80 PSI supply pressure, based on 100°F temperature rise and 150 PSI maximum allowable tank pressure.

Q: Can the Wilkins WXTP-75V be used with hot water systems?

A: Yes, while certified to NSF/ANSI Standard 61 domestic hot, the tank is suitable for temperatures up to 200°F. However, it should be mounted on the cold water supply at least 18 inches from the cold water inlet to the heater.

Q: What accessories are recommended for installation with the Zurn WXTP-75V?

A: Recommended accessories include the NR3XL water pressure reducing valve, P1000AXL pressure relief valve, TP1100A temperature and pressure relief valve, and 375XL reduced pressure backflow preventer.

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