Pipe types can refer to a variety of different materials used in the construction of pipes. The crossword solutions for the term 'pipe types' are BRIERS (6 letters), ELLS (4 letters), and BRIARS (6 letters). Briers are a type of pipe made from a combination of clay and straw, while ELLS are a type of pipe made from metal or plastic. Briars are a type of pipe made from a combination of wood and clay. All three of these pipe types are commonly used in plumbing and other construction projects.