Telescoping adjustable drain

An adjustable drain, comprising:

• a catch basin having a top side and an underside, the catch basin defining:
• a pan that has:
• a pan perimeter surface that extends along a pan perimeter, and defines a perimeter edge;
• and
• a pan base that slopes downwardly from the pan perimeter edge toward a pan aperture that is defined by a pan aperture boundary for water flowthrough,
• an inner tube having an inner tube top end that is connected to the pan aperture boundary and an inner tube peripheral wall that extends downwardly, along the underside of the catch basin, from the inner tube top end to an inner tube bottom end;
• and
• an outer tube disposed below the pan base, the outer tube having an outer tube top end and an outer tube peripheral wall extending downwardly from the outer tube top end to an outer tube bottom end,
• wherein the inner and outer tubes are configured as telescoping tubes.