Caleffi 502115A MINICAL™ Automatic Air Vent with Check Valve, 1/8" MNPT FS1500L Electrical: 120V - 60Hz /

Electrical: 120V - 60Hz / 4

Featuring a semiconductor sensor and a high-performance rechargeable lithium battery

Perma-SHIELD non-stick aluminum coating protects the blade against heat

and Shield

Caleffi 502115A MINICAL™ Automatic Air Vent with Check Valve, 1/8" MNPT FS1500L Electrical: 120V - 60Hz /Caleffi 502115A MINICAL Automatic Air Vent with Check Valve, 1 8" MNPT Automatic air vents are designed to remove trapped air that accumulates in heating and air conditioning systems automatically. Air removal enhances performance and life of a system by reducing the affects of: corrosion due to the oxygen pockets of air trapped in the heating emitters cavitation in the circulation pumps The check valve on the 5021 series allows for easy replacement