Description
The Lennox 49L04 is a Sight Glass, a small window, usually measuring about 1 inch by 1 inch by 1 inch, and is installed in HVAC systems. It enables technicians actually to observe the refrigerant flowing within the system. Through the sight glass, a technician can see air bubbles, dirt, or low levels of refrigerant that affect the unit’s performance. Sight glasses are a must-have tool installed in refrigerant lines to help maintain an ideal HVAC system. They are easy to install and they are light in nature and they offer a lot of information regarding the condition of the HVAC system.
