Abstract: A system to be used in combination with an air conditioning assembly and designed and structured for the detection of collected condensation at a predetermined level within a collection facility associated therewith and prior to actual over flow and also the detection of any leakage from any of the collection facilities or various plumbing components throughout the air conditioning system such that the detection of either excess collected condensation or leakage serves to shut-down the air conditioning assembly. The subject system may also be structured to restart the air conditioning assembly automatically once a level of collected condensation has receded or any leakage has been alleviated.

Abstract: An object of this invention is to provide an emergency drain for units such as air conditioners and the like, operative to collect fluid and shut off the unit when the primary drain for the unit becomes obstructed, thus protecting against damage due to overflow of the fluid, and wherein a low pressure is produced in the drain for evacuating fluid from the drain pan of the unit. Another object is to provide a one-way valve in the drain from an air conditioner or other appliance, whereby reverse flow of air or other fluid from the drain to the unit is prevented. The emergency drain comprises a fitting (11) mounted in the drain pan (14), with a primary drain opening (16) and a secondary or emergency drain opening (17) for draining away fluid accumulated in the pan when the primary drain becomes blocked.