Patent ID: 9134163
Filing Date: 2015-09-15
Classification: G01F

Abstract:
1. An apparatus for indicating the depth of liquid in a plurality of recreational vehicle wastewater tanks comprising: a sealable reservoir suitable for holding an indicating liquid and pressurized air wherein the indicating liquid comprises water and a colorant; the reservoir comprising: a manual piston pump that pressurizes the air in the reservoir; a connection element comprising a plurality of pipe fittings wherein each pipe fitting comprises a detachable connection to a pipe that communicates with liquid in the bottom of one of the recreational vehicle wastewater tanks to be gaged; a selection element for selectively and exclusively connecting one of said fittings to the pressurized air; a manometer tube that displays the pressure difference between the pressurized air and atmospheric pressure as a vertical height of the indicating liquid wherein the manometer tube further comprises a flow damper and the flow damper is located at an end of the manometer tube.