A drainage device and a method for draining a liner-type suction canister.
The drainage device includes a swingarm, a drainhead, and a suction
source. The drainhead is positioned to be in fluid communication with the
liner-type suction canister. The swingarm rotates to activate the suction
source and invert the liner-type suction canister. The contents of the
liner-type suction canister drain to a sewer system. The method includes
the acts of placing the liner-type suction canister on the swingarm,
coupling the drainhead to the liner-type suction canister, rotating the
swingarm, and activating the suction source.