2. Unit 13
Plumbing Prints

3. Objectives Identify various piping systems.
Recognize plumbing fixture symbols on prints.
Explain the three stages of plumbing installation.
Read a piping diagram.
(Charles E. Smith, Areté 3 Ltd.)

4. Stages of Plumbing Installation
Done prior to pouring foundation
Provisions for service entrance made
Provisions for sewer drain made
Stage 2
Completed prior to slab-on-grade construction and wall coverings
Rough-in plumbing
Installation of water supply and sewage drain pipes
Stage 3
Done after walls and floors are finished
Finish plumbing
Installation of fixtures

5. Stage 1
(Goodheart-Willcox Publisher)

6. Stage 2
(Goodheart-Willcox Publisher)

7. Water Distribution System
Main supply line from municipal meter or other supply source
All pipes that distribute water to service outlets:
Water heater
Sinks
Water closets
Hose bibbs
Control valves

8. Water Distribution System
(Herndon Engineering Services, Inc.; CR architecture + design)

9. Water Distribution Piping Materials
Copper piping
Galvanized steel pipe
Plastic pipe
Copper and plastic are most common for residential installations

10. Tankless Water Heaters
Green Building
Tankless Water Heaters
Produce instant hot water
Last longer and require less energy
Water is heated only as needed
More than one needed in large homes

11. Copper Piping Available in: Should not be embedded in concrete
Heavy, medium, and light wall thickness
Hard or soft tempers
Should not be embedded in concrete
Should never come in contact with other metals
Pipe joints are either sweated or threaded

12. Galvanized Steel Pipe Has great strength and dimensional stability
Coating protects against rusting
Three grades available:
S—Standard weight
XS—Extra strong
XXS—Double extra strong
Standard weight used for most residential and light commercial distribution systems

13. Plastic Pipe Used extensively in plumbing installations
Typically rated according to wall thickness and ability to carry hot water
Joints may be threaded, solvent welded, or connected using special fittings

14. Types of Plastic Pipe Polyvinyl chloride (PVC)
Used for cold water supply piping and sewage piping
Chlorinated polyvinyl chloride (CPVC)
Used for cold and hot water supply piping
Cross-linked polyethylene (PEX)
Flexible, lightweight tubing
Acrylonitrile butadiene styrene (ABS)
Used for sewage piping

15. Sleeves
Used when copper pipe passes through concrete slab or masonry wall
Copper run through plastic sleeve or larger pipe
Larger pipe allows movement due to expansion and contraction

16. Isometric Plumbing Drawing
(Charles E. Smith, Areté 3 Ltd.)

17. Plumbing Symbols
(Goodheart-Willcox Publisher)

18. Sewage Disposal System
Also known as DWV (drain/waste/vent) system
Includes:
Vertical soil stack
Vent
Trap for each fixture
Cleanouts at the base of each waste stack

19. Plumbing Codes Uniform Plumbing Code International Plumbing Code
Code provisions include:
Kinds and sizes of pipe to be used
Locations of traps and cleanouts
Fixture requirements
Venting provisions
Connections to supply and sewer lines
Leak testing conducted on supply and waste lines

20. Careers in Construction
Mechanical Trades
Many opportunities for employment
Plumbers, electricians, and HVAC technicians
Requires specialized training
3–5 years on-the-job and classroom training
Requires knowledge of reading prints and building codes

21. Test Your Knowledge
Take 10 minutes to complete the Test Your Knowledge Questions in the textbook.

22. Test Your Knowledge Answer Key
1. False 2. D. rough-in plumbing stage 3. True 4. False 5. C. Hose bibb A. Gate valve B. Floor drain D. Hot water supply 6. False

23. Test Your Knowledge Answer Key
7. False
8. B and C
9. D. Cleanout
10. C. Copper tubing

24. Activity 13-1: Plumbing Plans for a Residential Building Project
Take 20 minutes to complete Activity 13-1 in the textbook.

25. Activity 13-1 Answer Key
1. 4″ [Print MAR-3—Sheet MP2—Foundation Mechanical/Plumbing Plan] 2. An open circle [Print MAR-5—Sheet MP3—First Floor Mechanical/Plumbing Plan] 3. 3″; by the water heater [Print MAR-3—Sheet MP2—Foundation Mechanical/Plumbing Plan]

26. Activity 13-1 Answer Key 4. MP4
[Print MAR-7—Sheet MP4—Second Floor Mechanical/Plumbing Plan]
5. A. 1 1/2″
B. 3″
C. 2″
[Print MAR-5—Sheet MP3—First Floor Mechanical/Plumbing Plan]

27. Activity 13-1 Answer Key
6. 3″ [Print MAR-7—Sheet MP4—Isometric of Drainage System] 7. The left side [Print MAR-3—Sheet MP2—Foundation Mechanical/Plumbing Plan] 8. Three

28. Activity 13-2: Plumbing Plans for a Commercial Building Project
Take 20 minutes to complete Activity 13-2 in the textbook.

29. Activity 13-2 Answer Key
1. Mechanical room (101) [Print DEL-23—Sheet P1.1—Plumbing Plans] 2. A. 3/4″ B. 1 1/2″ C. 2″ D. 3/4″ gallon 4. Visit the site [Print DEL-24—Sheet P2.1—Plumbing Plans]

30. Activity 13-2 Answer Key
5. P2.1 [Print DEL-24—Sheet P2.1—Plumbing Plans] 6. A. 3″ B. 4″ at four locations; 3″ at two locations C. 3″ 7. A. American Standard with Sloan Optima valve; floor mount B. Woodford 65; anti-siphon; cast iron C. Oasis P8AC with glass filler; ADA compliant

31. Activity 13-2 Answer Key
8. 4″ [Print DEL-23—Sheet P1.1—Plumbing Plans] 9. 4″ 10. 1/8″ per foot slope