The Lennox 79J75 Sweat Expansion Equal Thermal Expansion Valve (3/8" × 1/2") is a precision-engineered component designed to regulate refrigerant flow for optimal HVAC system performance. Featuring sweat-type copper connections for easy brazed installation, this externally equalized TXV ensures consistent superheat control and efficient cooling under varying load conditions. Built wit... https://www.partshnc.com/38x12swt-ext-equal-txv-val