A flexible air hose connection between a preconditioned air unit and an aircraft incorporates an air filter between the first and second ends to capture and filter foreign matter in the air stream through the flexible tube. The filter may be sewn, fitted with snaps, hook and loop and/or zippered into the interior of the air hose. In particular embodiments the air filter incorporates a mesh screen, or alternatively comprises a fibrous material of foam, pleated paper, or spun fiberglass. In one embodiment the filter may be a high efficiency particulate air (HEPA) filter meeting the efficiency standard set by the Department of Energy.

A duct is shaped and sized for connectability to a vent (or vent adaptor). The duct has an end portion with a flared section separated from a tapered flap section by a lip. The flaps are foldable inwardly at the lip upon engagement with the vent, and airflow through the duct presses the folded flaps against the vent for additional securement of the connection between same. Additional securement and stability may be provided by an adhesive retaining a tapered flap section to a flared section following inward folding of the tapered flap section.

A hose assembly including a hose having a first end, a second end, and a substantially hollow interior, and an adjustable sleeve extending over or under at least a portion of the hose, where the adjustable sleeve is varyingly configurable, and where the adjustable sleeve is capable of being adjusted from a first configuration to a second configuration and maintained in the second configuration, where configuration of the adjustable sleeve correspondingly adjusts a configuration of the hose.

A union for connecting a first fluid conduit and a second fluid conduit includes a body. The body defines a central passage about a central longitudinal axis of the body with the body having a first side and a second side. The body is configured to define a first adhesive channel between a first fluid conduit and the first side of the body and to define a second adhesive channel between a second fluid conduit and the second side of the body. The body defining an injection port position at a midpoint of the body. The injection port in fluid communication with the first adhesive channel and the second adhesive channel and is configured to deliver adhesive into the first adhesive channel and the second adhesive channel.

A union for connecting a first fluid conduit and a second fluid conduit includes a body. The body defines a central passage about a central longitudinal axis of the body with the body having a first side and a second side. The body is configured to define a first adhesive channel between a first fluid conduit and the first side of the body and to define a second adhesive channel between a second fluid conduit and the second side of the body. The body defining an injection port position at a midpoint of the body. The injection port in fluid communication with the first adhesive channel and the second adhesive channel and is configured to deliver adhesive into the first adhesive channel and the second adhesive channel.

A union for connecting a first fluid conduit and a second fluid conduit includes a body. The body defines a central passage about a central longitudinal axis of the body with the body having a first side and a second side. The body is configured to define a first adhesive channel between a first fluid conduit and the first side of the body and to define a second adhesive channel between a second fluid conduit and the second side of the body. The body defining an injection port position at a midpoint of the body. The injection port in fluid communication with the first adhesive channel and the second adhesive channel and is configured to deliver adhesive into the first adhesive channel and the second adhesive channel.

A union for connecting a first fluid conduit and a second fluid conduit includes a body. The body defines a central passage about a central longitudinal axis of the body with the body having a first side and a second side. The body is configured to define a first adhesive channel between a first fluid conduit and the first side of the body and to define a second adhesive channel between a second fluid conduit and the second side of the body. The body defining an injection port position at a midpoint of the body. The injection port in fluid communication with the first adhesive channel and the second adhesive channel and is configured to deliver adhesive into the first adhesive channel and the second adhesive channel.