use. he Centering Head provides a quick and accurate means of establishing pipe center line, locating points on tanks or pipes, measuring slope, establishing angles, and laying keyways. Holding tools (a) Bench vice (b) Pipe vice. Tee 7. Type of Fittings 1. Collar 2. Elbow 3. Pipe Fitting Product Line UÊ > i>L iÊ À Ê* «iÊ ÌÌ }Ã Threaded Fittings Class 150 (Standard) Class 300 (XS/XH) UÊ >ÃÌÊ À Ê* «iÊ ÌÌ }Ã Threaded Fittings Class 125 (Standard) Class 250 (Extra Heavy) Flanged Fittings Class 125 (Standard) Class 250 (Extra Heavy) Drainage Fittings UÊ- > Ê-Ìii Ê ÌÌ }Ã The Centering Head tool can be used to measure and mark different points around the pipe, flange or fitting. Any part used in connection with water supply, distribution, measurement, controlling, use and disposal of water is known as a pipe fitting (Fig. Gasket 4. The dial face isv stamped in 2 1/2º increments. of flow, distribute the water supply from the main pipe to other pipes of equal size or lower size, etc. Unit 2.indd 6 8/7/2018 10:59:45 AM The major tools used in plumbing are categorised as: 1. 5.2). The tools can be categorised as per the nature of work like holding tools, fitting tools, cutting tools, pipe threading and bending tools, etc. Union 5. Reducer 6.