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• P2909.2

  Reverse Osmosis Drinking Water Treatment Units

  • Residential RO units meet NSF 58 or CSA B483.1 and drain through an air gap.

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

• P3102

  Vent Stacks and Stack Vents

  International Residential Code, 2024 · Chapter 31, VentsRead the full text (opens UpCodes in a new tab)

• P3108

  Wet Venting

  International Residential Code, 2024 · Chapter 31, VentsRead the full text (opens UpCodes in a new tab)

• P2715

  Laundry Tubs

  International Residential Code, 2024 · Chapter 27, Plumbing FixturesRead the full text (opens UpCodes in a new tab)

• P2703

  Tail Pieces

  International Residential Code, 2024 · Chapter 27, Plumbing FixturesRead the full text (opens UpCodes in a new tab)

• P2906.13.1

  Mechanical Joints

  • Stainless mechanical joints follow the maker.

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

• P2603.5

  Freezing

  • Where the winter design temperature is 32 F or lower, pipes outside, in exterior walls, attics or crawl spaces are protected from freezing; water service is at least 12 in deep and 6 in below the frost line.

  Local review: San Antonio's winter design temperature is roughly 30 F, so the freeze-protection rule applies; confirm the frost depth the city publishes for water service burial.

  International Residential Code, 2024 · Chapter 26, General Plumbing RequirementsRead the full text (opens UpCodes in a new tab)

• P3005.2.7

  Manholes

  • Manholes are approved; indoor manholes have gastight, tool-removable covers.

  International Residential Code, 2024 · Chapter 30, Sanitary DrainageRead 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.