1/8" Air Vent for Water Systems

Details

Model: 67
Manufacturer: Maid-O-Mist
Part Number: 2074
Description: Automatic Air Vent Valve, 1/8" MPT, 50 PSI, Brass Body, Float-Operated.

Product Overview

The Maid-O-Mist No. 67 Automatic Air Vent is a compact, float-operated vent designed for hydronic heating systems requiring automatic air removal. Constructed with a brass body and precision-sealed float mechanism, the No. 67 is engineered for performance in confined or difficult-to-access areas. This model is rated for system pressures up to 50 PSI and is suitable for use in convectors, baseboard radiation systems, and radiant panels where air entrapment can reduce system efficiency or create noise. The vent’s design eliminates the need for a separate air chamber and supports continuous, maintenance-free operation in closed water circulation systems.

Technical Specifications

• Manufacturer Part Number: 2074
• Model Number: 67
• Type: Automatic Air Vent Valve
• Operation: Float-actuated automatic venting
• Connection Type: Male Pipe Thread (MPT)
• Connection Size: 1/8 inch NPT
• Body Material: Brass
• Working Pressure: Up to 50 PSI
• Media Compatibility: Water and hydronic heating fluids
• Dimensions: 3-3/4 inch height x 9/16 inch diameter
• Temperature Range: Suitable for typical closed-loop hydronic operating temperatures
• Installation Orientation: Vertical; mount at system high points or venting locations
• Maintenance: Self-operating; no periodic service required under normal conditions

Installation Notes

• Install vertically at high points or air accumulation zones in the system.
• Ensure system pressure does not exceed 50 PSI during operation.
• Apply suitable thread sealant on MPT connection during installation.
• No auxiliary air chamber or manual venting device required.
• Inspect system after startup to confirm air elimination and leak-free connection.

Summary

The Maid-O-Mist No. 67 Automatic Air Vent is a precision float-operated valve built for reliable air elimination in hydronic heating systems. Featuring a brass body, 1/8" MPT connection, and 50 PSI rating, it provides a compact, durable solution for automatic venting in convectors, baseboards, and radiant panels, ensuring efficient system performance and long-term operation.