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Every 2024 IRC section and the IBC as it loads, by number or topic, plus the local rules for your city. Free to search.

Detached houses, duplexes and townhouses up to 3 stories with their own exits use the IRC; every other building uses the IBC (IBC 101.2).

39 sections matching “P2904” for San Antonio, TX, the 2024 IRC and IBC

  • P2904.1

    General

    • Home sprinklers follow NFPA 13D or P2904 (wet systems without antifreeze); no backflow preventer is needed if piping meets P2906, no antifreeze and no fire department connection.

    Local review: Texas law generally keeps cities from requiring sprinklers in one- and two-family homes, so this section usually applies only when a builder installs one voluntarily; confirm for the project.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.3

    Sprinkler Piping System

    • Sprinkler piping follows cold water piping rules; multipurpose sprinkler pipe is part of the cold water system; plastic per the maker.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.7

    Instructions and Signs

    • The owner gets a manual, and a warning sign at the main shutoff says not to add softeners, filters or shutoffs without a sprinkler review.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.1.1

    Required Sprinkler Locations

    • Sprinklers cover the whole dwelling except attics, crawls and concealed spaces without fuel appliances, small closets and pantries (24 sq ft, 3 ft wide, drywall), baths of 55 sq ft or less, garages, carports, porches and mudrooms.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.2.1

    Temperature Rating and Separation From Heat Sources

    • Sprinkler ratings are 135 to 225 F, separated from heat sources per the maker.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.2.2

    Intermediate Temperature Sprinklers

    • Intermediate 175-225 F heads are used under skylights, in attics and roof-adjacent concealed spaces, and within set distances of heat sources (e.g. 3-6 in of furnaces, 9-18 in of ranges and ovens).

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.2.3

    Freezing Areas

    • Sprinkler piping in freezing areas is protected per P2603.5, or uses a listed dry-pipe system or dry heads extending into the cold area.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.2.5

    Sprinkler Installation on Systems Assembled With Solvent Cement

    • On solvent-welded systems, adapters are cemented and checked clear of cement before heads go in.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.2.6

    Sprinkler Modifications Prohibited

    • Sprinklers are never painted, caulked or modified; damaged heads are replaced.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.3.1

    Nonmetallic Pipe and Tubing

    • CPVC, PEX and PE-RT sprinkler pipe is listed for residential sprinklers.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.3.2

    Shutoff Valves Prohibited

    • No valves can isolate sprinklers, except the main shutoff or a locked-open sprinkler control.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.4.1

    Determining Required Flow Rate for Each Sprinkler

    • Each head's flow comes from the maker's data for its coverage, ceiling, temperature and conditions.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.4.2

    System Design Flow Rate

    • Design flow is one head's flow in one-head rooms, twice the largest in rooms with two or more, the worst room governing; rooms may be split by 8 in lintels.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.5.1

    Water Supply From Individual Sources

    • Well or tank supplies are rated at the pump's minimum pressure setting.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.5.2

    Required Capacity

    • Supply lasts 7 minutes for one-story homes under 2,000 sq ft, 10 minutes otherwise.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.6.1

    Method of Sizing Pipe

    • Size by the prescriptive method or NFPA 13D hydraulics; pipe at least 3/4 in and head adapters at least 1/2 in.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.6.2

    Prescriptive Pipe Sizing Method

    • Prescriptive sizing finds available pressure and checks pipe length against Tables P2904.6.2(4)-(9) for copper, CPVC, PEX and PE-RT.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.8.1

    Preconcealment Inspection

    • Before cover, check coverage, obstructions, ratings and heat-source spacing, pipe size and length, listed plastic pipe, supports, and the pressure test.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.8.2

    Final Inspection

    • At final, check heads are unpainted and undamaged, pumps start automatically, no flow-restricting devices were added, and the sign and manual are present.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.2.4.2

    Obstructions to Coverage

    • Obstructed spray needs more heads unless separated per the figure or the maker.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.3.1.1

    Nonmetallic Pipe Protection

    • Plastic sprinkler pipe is covered by 3/8 in drywall, 1/2 in plywood or 15-minute material, except in unsprinklered areas or where listed for exposure.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.4.1.1

    Ceiling Configurations

    • Flat-ceiling flows apply to smooth ceilings up to 8:12 and 24 ft high, with beams up to 14 in in compartments to 600 sq ft, heads above openings, and deflectors 1-2 in below beams.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.4.1.2

    Ceiling Configurations With Special Sprinkler Listings

    • Other ceilings use flows for heads specially listed for them.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.4.1.3

    Other Ceiling Configurations

    • Ceilings not otherwise covered need the official's approval of flow.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.6.2.1

    Available Pressure Equation

    • Available pressure equals supply pressure minus service, meter, device and elevation losses and the head's required pressure.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.6.2.2

    Calculation Procedure

    • Steps: get supply pressure, subtract service, meter, device and elevation losses and head pressure, then check the run to the farthest head against the length table.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.2.4.2.1

    Additional Requirements for Pendent Sprinklers

    • Pendent heads within 3 ft of a ceiling fan or surface light are obstructed and need more heads.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2904.2.4.2.2

    Additional Requirements for Side-Wall Sprinklers

    • Sidewall heads within 5 ft of a ceiling fan or surface light are obstructed and need more heads.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • P2902.5.4

    Connections to Automatic Sprinkler Systems

    • Sprinkler connections get a double check or RP assembly, unless the system is a P2904 multipurpose or stand-alone system.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

Searches all 4,276 IRC 2024 sections, 5,532 IBC 2024 sections and defined terms (Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33 so far) and each city's local rules as they are added. Section numbers and titles from the International Residential Code and International Building Code, 2024 editions, copyrighted by the International Code Council; the IRC's electrical chapters (34 to 43) follow NFPA 70, the National Electrical Code. Requirements are summarized in our words (IRC Chapters 3 to 43, IBC Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33); read the full text at the link on each result. Local values come from each city's published documents.

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