the unit includes a 1/4" male NPT bottom connection and a 1/8" female NPT side connection to streamline integration into existing piping

The heavy-duty rubber diaphragm in this kit eliminates friction by removing the need for sliding parts

often leading to reduced cooling capacity

Built for compatibility with Wayne combustion systems

Aaon P85390 Limit Switch 321042-401 the unit includes a 1/4"The Aaon P85390 Limit Switch is a critical safety component engineered for precision temperature monitoring in high performance HVAC systems. This L140 20F limit switch serves as a reliable thermal safeguard, designed to automatically break the electrical circuit when internal temperatures reach the 140F setpoint and reset once they drop by 20F. As a genuine Aaon replacement part, it ensures seamless integration and maintains the structural integrity