Patent ID: 8038913

Claim:
A method for inverting a liner into an existing conduit, comprising: placing a flexible tubular liner into an installation apparatus having a first gland and a second gland downstream and spaced apart from the first gland; securing an end of the liner to the apparatus upstream of the first gland; inverting the liner through the apparatus past at least one gland; positioning a fluid inlet port in the inverted portion of the liner downstream of the at least one gland; closing one of the glands with the fluid inlet port on the downstream side thereof; introducing a pressurized inversion fluid into the inverted portion of the liner through the fluid inlet port; and allowing the liner to invert in response to the fluid introduced through the fluid inlet port, wherein the fluid inlet port is a first fluid inlet port, the method further including positioning the first fluid inlet port in the inverted liner downstream of the second gland and positioning a second fluid inlet port between the two glands.