Joint seal system and method

A method of joining a first duct section and a second duct section which allows for a variable distance therebetween, said method comprising the steps of:

• a) fixing a position of said first duct section, said first duct section comprising:
• i) a body having a circular cross-sectional shape;
• ii) a first flange integrally formed with a first end of said body, wherein said first flange is continuous around a periphery of said first end of said body, wherein said first flange is substantially perpendicular to a main longitudinal axis of said body;
• and,
• iii) a second flange integrally formed with a second end of said body, wherein said second flange is continuous around a periphery of said second end of said body, and wherein said second flange is substantially perpendicular to said main longitudinal axis of said body;
• b) fixing a position of said second duct section, said second duct section comprising:
• i) a body having a circular cross-sectional shape;
• and
• ii) a first flange integrally formed with a first end of said body, wherein said first flange is continuous around a periphery of said first end of said body, wherein said first flange is substantially perpendicular to a main longitudinal axis of said body;
• c) positioning an intermediate duct section between said first duct section and said second duct section, said intermediate duct section comprising:
• i) a first end formed with a fixed flange thereon;
• ii) a second end formed as a free end, wherein a cross-sectional shape and a peripheral dimension of said free end is substantially the same as a cross-sectional shape and a peripheral dimension of said first end of said intermediate duct section without said fixed flange;
• and,
• iii) a slip collar positioned over a portion of an exterior of said intermediate duct section between said first and second ends, wherein said slip collar may move along a length of said intermediate section, wherein said slip collar is formed with a slip collar flange thereon, wherein said slip collar is formed with an anchor and a connector, and wherein said anchor and said connector are configured to allow a user to selectively secure a position of said slip collar with respect to said first and second ends of said intermediate duct section;
• d) inserting said free end of said intermediate duct section into said first duct section such that said free end extends into said first duct section beyond said first flange of said first duct section;
• e) positioning a first gasket between said fixed flange of said intermediate duct section and said first flange of said second duct section;
• f) positioning said fixed flange of said intermediate duct section adjacent said first flange of said second duct section;
• g) securing said fixed flange of said intermediate duct section to said first flange of said second duct section;
• h) positioning a second gasket between said slip collar flange and said first flange of said first duct section;
• i) moving said slip collar toward said first flange of said first duct section until said slip collar flange is adjacent said first flange of said first duct section;
• j) securing said slip collar flange of said intermediate duct section to said first flange of said first duct section;
• and
• k) sealing a space between said slip collar and an exterior surface of said intermediate duct section.