Caleffi 502115A MINICAL™ Automatic Air Vent with Check Valve, 1/8" MNPT FS1500L Featuring a semiconductor sensor and

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

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

Open-weave outer shell for comfort

Superior clearing power

The 834 Series cleanout bodies are sealed with a plug to block sewer gas and topped with solid covers suitable for various traffic requirements

Caleffi 502115A MINICAL™ Automatic Air Vent with Check Valve, 1/8" MNPT FS1500L Featuring a semiconductor sensor andCaleffi 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