Pipe Bend is a plumbing term that refers to the curved sections of pipe used to change the direction of the flow of water. The three solutions for this term are ELL (3 letters), ELBOW (5 letters) and TRAP (4 letters). An ELL is a short section of pipe with a 90 degree bend, while an ELBOW is a longer section of pipe with a 45 degree bend. A TRAP is a U-shaped section of pipe that is designed to prevent sewer gases from entering a building.