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Chapter 20

Chapter 20. Plumbing Plans. Introduction. Classifications of piping: Industrial or residential (i.e., plumbing) Types of pipes: Copper Plastic Metal Steel Cast iron. Introduction (cont’d.). Residential plans Generally don’t require complete plumbing plan

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Chapter 20

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  1. Chapter 20 Plumbing Plans

  2. Introduction • Classifications of piping: • Industrial or residential (i.e., plumbing) • Types of pipes: • Copper • Plastic • Metal • Steel • Cast iron

  3. Introduction (cont’d.) • Residential plans • Generally don’t require complete plumbing plan • Need should be verified with local building code • In most cases, requirements can be provided on floor plan • Symbols for fixtures • Notes for specific applications or conditions

  4. Plumbing Terms and Definitions • Key terminology: • Cleanout • Drain • Fitting • Hose bibb • Main • Plumbing fixture, system, and wall • Potable water • Riser • Rough-in • Run • Sanitary sewer • Sewer • Soil pipe and stack

  5. Terms and Definitions (cont’d.) • Key terminology (cont’d.): • Stack • Storm sewer • Trap • Valve • Vanity • Vent pipe and stack • Waste pipe and stack • Water closet • Water distributing pipe • Water heater, main, and meter • Water service

  6. Size of Plumbing Piping • Water supply plumbing is based on: • Amount of water needed • Supply pressure • Pipe length • Number of stories to be supplied • Flow pressure needed at farthest point

  7. Size of Plumbing Piping (cont’d.) • Size of drainage piping is based on: • Standards established for fixture type • Average amount of waste discharged through the fixture in a given amount of time • Size of vent pipes is based on: • Number of drainage fixture units that drain into waste portion of vent stack

  8. Universal Plumbing Installations • Design considerations: • Sinks • Water closet • Bathtubs • Showers

  9. Plumbing Schedules • Similar to door, window, and lighting fixture schedules • Mortgage lenders may require a complete description of materials

  10. Plumbing Drawings • Usually not on the same sheet as complete floor plan • Only plumbing items on floor plans are fixtures • Generally drawn separately • Floor plan is used as a base drawing • May be prepared by a drafter or in conjunction with a plumbing contractor

  11. Water Systems • Water supply to a structure begins at a: • Water meter for public systems • Water storage tank for private well systems • Water supply to home or business: • Known as the main line • Generally 1" plastic pipe

  12. Water Systems (cont’d.) • Water heaters • Placed on a platform with an overflow tray • Recommended sizes vary • Hose bibbs • Faucets used to attach a hose • Outside hose bibbs require a separate valve • Allows owner to turn off water to hose bibb during freezing weather

  13. Drainage and Vent Systems • Drainage system • Provides for distribution of solid and liquid waste to sewer line • Vent system • Allows continuous airflow through the system • Gases and odors can dissipate • Bacteria do not have an opportunity to develop

  14. Isometric Plumbing Drawings • Provide three-dimensional representation of a plumbing layout (i.e., plumbing riser diagram)

  15. Automatic Fire Sprinkler Systems • 2009 International Residential Code (IRC) • Section P2904 of the International Plumbing Code (IPC) • Requires automatic fire sprinkler systems for all new townhouse construction • Not required on additions or alterations made to existing townhomes

  16. Sewage Disposal • Sanitary sewer system • Underground pipes collect and transfer wastewater to treatment plants or private sewage treatment • Includes domestic, business, and industry • Not designed to handle storm water • Systems: • Public sewers • Private sewage disposal (e.g., septic tank)

  17. Fire Sprinkler Systems • Commonly used in commercial buildings • Becoming a consideration in residential design • Sometimes required • Determined by local governing agency, by square footage or location • Water plug releases water when heat reaches a certain temperature • Several advantages

  18. Metrics in Plumbing • Pipe is made of a wide variety of materials • Identified by trade names • Nominal sizes related loosely to actual dimensions • Metric values established by International Organization for Standardization • Relate nominal pipe sizes in inches to metric equivalents (i.e., diameter nominal)

  19. Adding Plumbing Information to the Floor Plan • Residential floor plan drawings plumbing symbols and notes • May be placed with all other floor plan content • Aid in reading and understanding • Notes are generally minimal • Can also be placed on a separate drawing

  20. Commercial Plumbing Drawings • In most cases, are an individual component of the complete set of plans • Architect or mechanical engineer prepares plumbing drawings over base floor plan • Keeps drawing clear of unwanted information • Makes it easier for the plumbing contractor to read the print

  21. Plumbing Plan Drawing Checklist • Refer to the text for a plumbing plan drawing checklist • Check off items as you work on the plumbing plan • Ensures all of necessary items are included

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