The term 'right-angle pipe' is a type of pipe fitting that is used to connect two pipes at a 90-degree angle. The crossword solutions for this term are 'ELBOW' (5 letters) and 'ELL' (3 letters). An ELBOW is a curved piece of pipe that is used to change the direction of the flow of a liquid or gas, while an ELL is a short length of pipe with a right-angle bend. Both of these pieces of pipe are commonly used in plumbing and other piping systems.