Hydrotherm 60-4280 Sight Glass 318973-401 It is direct-fit compatible with

It is direct-fit compatible with specific models

For technicians looking for a reliable refrigeration isolation valve

This unit includes a set of flanges to streamline the install

Key Benefits Factory Programmed: Pre-loaded with proprietary York algorithms for exact torque and speed control without field setup

Hydrotherm 60-4280 Sight Glass 318973-401 It is direct-fit compatible withThe Hydrotherm 60 4280 Sight Glass is a heavy duty boiler gauge glass assembly designed for critical fluid monitoring in steam and hydronic heating systems. Engineered with borosilicate glass, this component provides high thermal shock resistance and structural integrity under significant operating pressures. As a direct OEM replacement part, it ensures precise water level visibility, which is essential for preventing dry firing and maintaining safe