Lennox 11W00 Piston Assembly 321894-709 Whether used for initial system

Whether used for initial system dehydration or as a system cleanup core following a terminal failure

meaning it breaks the circuit on a temperature drop

allowing for a seamless swap-in during routine service or emergency repairs

Check existing system requirements to ensure the metering device is sized correctly for the R-410A charge

extending the service life of internal components

Lennox 11W00 Piston Assembly 321894-709 Whether used for initial systemThe Lennox 11W00 Piston Assembly is a precision engineered . 067 fixed orifice metering device designed for consistent refrigerant flow control in Lennox and Allied Air residential cooling systems. Engineered for high pressure durability, this HVAC expansion piston ensures optimal evaporator coil performance by maintaining the necessary pressure drop between the liquid line and the coil. Whether you are performing a dry charge unit installation or