Black and white line drawing of a jar with tubes and taps on the lid.

Draw a schematic of a device to unblock small-diameter piping, comprising: - an empty jam jar with two precisely drilled/punched holes in the lid, approx. 1/4 inch in diameter; - in each hole, a short section of pipe to which a miniature 1/4 turn tap is secured above the lid; one of the pipes goes down into the jar, stopping a few millimetres short of the bottom. - a flexible tube (catheter-type) is secured onto the other end of each tap. See more