Lennox 49L04 Sight Glass 321702-401 Built for rigorous commercial boiler

Built for rigorous commercial boiler maintenance

42" WC sensitivity

Electrically and physically

OEM York gaskets are manufactured to specific durometer and thickness tolerances that generic parts often miss

among other common HFC and HCFC blends

Lennox 49L04 Sight Glass 321702-401 Built for rigorous commercial boilerThe Lennox 49L04 Sight Glass is a heavy duty moisture and liquid indicator designed for precise refrigerant monitoring in high pressure commercial and residential HVACR systems. This moisture indicator sight glass features a high visibility element that provides an immediate visual diagnostic of the system's internal chemistry. As a critical liquid line sight glass, it allows technicians to verify refrigerant charge levels by identifying bubbles that