Essentials of Plumbing Lesson

LISTING WATER AND WASTE LINE FITTINGS

5. Fitting sizes are determined by the sizes of the pipe going to and from the fitting. This holds true for all water and waste line fittings.

a. Water line elbows are listed with the largest opening first. See figure 2-15

FIGURE 2-15. METHODS OF LISTING ELBOWS

FIGURE 2-15. METHODS OF LISTING ELBOWS

b. Water line tees are listed with the run first, starting with the largest opening, and then the outlet. See figure 2-16.

FIGURE 2-16. METHODS OF LISTING TEES

FIGURE 2-16. METHODS OF LISTING TEES

c. For waste fittings, list bend sizes with the largest opening first. See figure 2-17. List Y branches with the run first, starting with the largest opening, and then the outlet,

FIGURE 2-17. METHODS OF LISTING WASTE FITTINGS

FIGURE 2-17. METHODS OF LISTING WASTE FITTINGS

6. Obtain a list of water line fittings from the construction drawing diagram, rough-in information for each fixture and any other information indicated on the drawing.

a. The type and size of some fittings can be taken directly from the drawing. Fitting sizes are shown by the sizes of pipe going to and from a fitting. See examples in figure 2-18.

FIGURE 2-18. FITTING SIZES FOUND IN DIAGRAM

b. List the number of fittings by type and size.

TEES

one 2 x 3/4 x 3/4 inch
one 2 x 3/4 inch
three 2 inch

ELBOWS

two 2 inches
one 3/4 inch

c. Find some fitting sizes from the rough-in information for a fixture. See figure 2-19. Note: The water closet rough-in diagram is furnished by the manufacturer.

FIGURE 2-19. FITTING SIZES FOUND IN ROUGH-IN INFORMATION

FIGURE 2-19. FITTING SIZES FOUND IN ROUGH-IN INFORMATION

d. Find some fitting sizes from other information indicated on the drawing. In figure 2-20, the breakout in 11-C shows the method of installing one water closet. This installation includes the water pipe and fitting going down to the flush tank. Note: This type of information is normally found on drawings for theater of operations (TO) buildings. The list of fittings by type and size required for the eight water closets is as follows:

ELBOWS

eight 3/4 x 3/8 inch
two 3/4 inch

TEES

one 3/4 x 2 x 3/4 inch
five 3/4 inch

FIGURE 2-20. FITTINGS SIZES FOUND ADDED TO DIAGRAM

FIGURE 2-20. FITTINGS SIZES FOUND ADDED TO DIAGRAM

7. Obtain a list of water line valves by type and size from the construction drawing diagram and any other information indicated on the drawing. Valves are used in water lanes to start, control, and stop the flow of water. The water line going to and from the valve determines the size of the valve. A detailed breakout will show what is needed for installation. See detail 1 in figure 2-21. List valves and other fittings by type and size.

VALVES

three 2-inch gate valves
one 2-inch thermostatic mixing valve

OTHER FITTINGS

two 2- inch gate valves
one 2 1/2 x 2-inch bushing

FIGURE 2-21. VALVE SIZES FOUND IN DIAGRAM

FIGURE 2-21. VALVE SIZES FOUND IN DIAGRAM

8. Obtain a list of waste system fittings by size from the construction drawing and any other information indicated on the drawing.

a. Some waste system fitting sizes by type can be taken directly from the drawing. See figure 2-22.

b. List the number of fittings by type and size.

LATERAL Y

one 4-inch 45 degree regular
two 4 x 2-inch 45 degree reducing

BENDS

one 4-inch 1/8 regular
one 2-inch 1/8 regular

P-TRAPS

three 2-inch P-traps
one 4-inch P-trap

DRAIN

one 4-inch SD

FIGURE 2-22. WASTE SYSTEM FITTING SIZES FOUND IN DIAGRAM

FIGURE 2-22. WASTE SYSTEM FITTING SIZES FOUND IN DIAGRAM

9. Prepare a plumbing takeoff list for all the materials needed by type, size, and length for water supply service from point Z to all water closet tanks. Use the graphic scale (fig 2-23), construction drawing (fig 2-24), and the water closet breakout 11-G in figure 2-24. Make all measurements using the straightedge on a piece of paper. When you have completed your takeoff list, check it with the information below.

FIGURE 2-23. GRAPHIC SCALE

FIGURE 2-23. GRAPHIC SCALE

10. The takeoff list from point Z to the water closet tanks is as follows:

STEEL PIPE

47 1/2 feet (approximately)

TEES

one 2 x 1 1/2 x 3/4 inch
one 3/4 x 1 1/2 x 3/4 inch
five 3/4 inch

ELBOWS

two 3/4 inch
eight 3/4 x 3/8 inch

FIGURE 2-24. TAKEOFF LIST FOUND IN DIAGRAM

FIGURE 2-24. TAKEOFF LIST FOUND IN DIAGRAM