A prosthetic system includes a liner adapted to receive a residual limb and including an outer surface defining an outlet, and a socket including an interior surface and including an aperture extending from the interior surface to an external atmosphere. A first sealed volume is defined between a first portion of the outer surface of the liner and a first portion of the interior surface of the socket. A second sealed volume is defined between a second portion of the outer surface of the liner and a second portion of the interior surface of the socket. The first sealed volume is fluidly connected to the outer of the liner, fluidly separated from the second sealed volume by a seal element, and is independent from the second sealed volume throughout use of the system.
