Patent ID: 7331217
Filing Date: 2008-02-19
Classification: G01M

Abstract:
1. A method for testing a main drain pipe and its branches, comprising the steps of: sealing the main drain pipe and its branches at their extremities except at one point where the main drain pipe or a branch drain pipe is exposed; attaching a removable and re-useable air pressure testing device to the exposed main drain or branch drain pipe, the testing device having in fluid communication an input air pressure orifice, an air pressure gauge, a releasably attachable airtight sealing member attached to the exposed pipe and a valve between the gauge and the input air pressure orifice for sealing the orifice when the valve is closed; introducing positive air pressure into the orifice to pressurize the main drain and its branches to a predetermined air pressure; closing the valve; and, observing the pressure level as determined by the pressure gauge to see if there is a reduction in the positive air pressure indicative of a leak.