This Lochinvar Sight Glass is a crucial component designed for use in various heating and cooling systems. The sight glass, measuring 3/4 inches by 1-1/2 inches, allows for the visual inspection of fluid levels within a system without the need to open or dismantle the unit. Manufactured by Lochinvar, a trusted name in the industry, this sight glass is made from durable materials that can withstand high temperatures and pressures. It features clear visibility and accurate readings, ensuring optimal performance of your heating or cooling system.