Oatey 3sn Air Eliminator Key 1/8 Inch Ips

Product Description

The OATEY 3sn is an air eliminator key designed for use with the B72-140 air eliminator fitting. This small-diameter service key allows technicians to manually bleed trapped air from hydronic heating and plumbing systems. It fits a 1/8 inch IPS port and provides a reliable, tool-assisted means of venting air without disassembling the line. Plumbers and hydronic heating technicians keep this type of key on hand as a standard service item when commissioning or maintaining closed-loop systems where air pockets reduce flow efficiency and can cause noise or cavitation.

This air eliminator key is suited for residential and light commercial hydronic heating systems, radiant floor systems, and plumbing installations where manual air venting is required at a 1/8 inch IPS bleed port. It is specifically referenced as the correct service key for the B72-140 air eliminator assembly, making it the appropriate replacement or supplemental tool when the original key is missing or damaged.

Key Features

• Fits 1/8 inch IPS air eliminator bleed port
• Designed for use with the B72-140 air eliminator
• Compact form factor for use in tight mechanical spaces
• Allows manual air bleeding without system disassembly

Compatibility

Referenced as the correct service key for the OATEY B72-140 air eliminator. Fits 1/8 inch IPS bleed port configurations standard to that assembly.

Installation Notes

Installation and use of this air eliminator key is typically performed by licensed plumbers or hydronic heating technicians. Before bleeding air from the system, reduce system pressure to a safe working level and have an appropriate catch container ready to collect any released fluid. Do not overtighten the bleed port fitting after servicing, as over-torquing the small IPS fitting can damage the seat or threads.

Technical Specifications

• Port Size: 1/8 inch IPS
• Product Type: Air Eliminator Key
• Compatible Assembly: B72-140

Standard Information

• Brand: OATEY
• Manufacturer Part Number: 3sn