HVAC Air Pressure Switch - ESP RSS-495-011

This is an ESP (Energy Saving Products) RSS Universal Air Switch, model RSS-495-011, designed for HVAC applications. The device is a circular black plastic pressure switch measuring approximately 4 inches in diameter with mounting tabs extending the overall width to about 5.5 inches. Two clear plastic tubing connections protrude from the bottom, each roughly 6 inches long.

N. Olmsted Cleanout

March 1, 2026