A leak detection system for testing a non-pressurized conduit, the leak detection system comprising: a first fluid section comprising: a first fluid line; and an attachment member configured to be secured to the non-pressurized conduit, the attachment member comprising a testing chamber connected to the first fluid line, the attachment member comprising a first member and a second member configured to be moved between an open position and a closed position, the attachment member further comprising a seal providing for the testing chamber to be airtight when the first and second members (31, 32) are in the closed position; a second fluid section comprising a second fluid line connected to the first fluid line; valves connected to the first fluid line and the second fluid line, the valves adjustable between open and closed positions to control fluid entering and exiting the first fluid line and the second fluid line, and to control a flow of the fluid between the first and second fluid lines (21, 41); a fluid movement device connected via a supply line to each of the first and second fluid lines (21, 41) and configured to create a desired fluid pressure within the first and second fluid lines (21, 41); wherein once the desired fluid pressure is achieved, the valves can be closed to isolate the first and second fluid sections (20, 40) from the fluid movement device; and a pressure sensor connected to each of the first and second fluid lines (21, 41) and configured to sense a difference in fluid pressure between the first fluid line and the second fluid line over time. a first fluid section comprising: a first fluid line; and an attachment member configured to be secured to the non-pressurized conduit, the attachment member comprising a testing chamber connected to the first fluid line, the attachment member comprising a first member and a second member configured to be moved between an open position and a closed position, the attachment member further comprising a seal providing for the testing chamber to be airtight when the first and second members (31, 32) are in the closed position; a first fluid line; and an attachment member configured to be secured to the non-pressurized conduit, the attachment member comprising a testing chamber connected to the first fluid line, the attachment member comprising a first member and a second member configured to be moved between an open position and a closed position, the attachment member further comprising a seal providing for the testing chamber to be airtight when the first and second members (31, 32) are in the closed position; a second fluid section comprising a second fluid line connected to the first fluid line; valves connected to the first fluid line and the second fluid line, the valves adjustable between open and closed positions to control fluid entering and exiting the first fluid line and the second fluid line, and to control a flow of the fluid between the first and second fluid lines (21, 41); a fluid movement device connected via a supply line to each of the first and second fluid lines (21, 41) and configured to create a desired fluid pressure within the first and second fluid lines (21, 41); wherein once the desired fluid pressure is achieved, the valves can be closed to isolate the first and second fluid sections (20, 40) from the fluid movement device; and a pressure sensor connected to each of the first and second fluid lines (21, 41) and configured to sense a difference in fluid pressure between the first fluid line and the second fluid line over time.