CASH ACME 22398LF – VR20 3/4IN VACUUM RELIEF VALVE

WITH DUST COVER – BULK

The Cash Acme 22398LF VR20 vacuum relief valve is designed to protect hot water systems and pressure vessels from damaging negative pressure conditions. Installed on the cold water supply line, this valve automatically opens at 1 inch of mercury (Hg) vacuum, admitting air to break siphonage and prevent heater burnout or storage tank collapse.

The integrated dust cover protects the vent opening from debris and contaminants, ensuring consistent long-term performance in residential and commercial plumbing systems.

Product Overview

• Manufacturer: Cash Acme (Reliance Worldwide Corporation)
• Part Number: 22398LF
• Series: VR20
• Valve Type: Vacuum Relief Valve
• Nominal Size: 3/4 in
• Connection: 3/4 in MNPT (Male NPT)
• Lead Free: Yes (NSF/ANSI 372 compliant)
• Dust Cover: Included

The VR20 closes tightly under normal system pressure and opens instantly when vacuum conditions occur. Each valve is factory tested to ensure performance and reliability before shipment.

Technical Specifications

• Vacuum Relief Activation: Opens at 1 in Hg vacuum
• Maximum Inlet Pressure: 200 psi
• Maximum Water Temperature: 210°F
• Air Flow Capacity: Approximately 13 SCFM @ 2 in Hg
• Body Material: Lead-Free DZR Brass
• Cap Material: Lead-Free DZR Brass
• Spring: Stainless Steel
• Seat Disc: Heat‑resistant Silicone
• Dust Cover Material: Polypropylene
• Recommended Orientation: Upright installation

Key Features

• Prevents internal vacuum conditions in hot water systems
• Protects against siphonage, heater burnout, and tank collapse
• Automatically reseals once pressure is restored
• Slotted vent design with protective dust cover
• Compact, low-profile construction
• CSA listed and inspector-friendly
• Individually performance tested at the factory

Typical Applications

• Residential water heaters
• Commercial hot water storage tanks
• Pressure vessels requiring vacuum protection
• Domestic and light commercial plumbing systems