jaspector
§ Chapter 29 IRC 2021

Water Supply and Distribution

10 entries from Chapter 29 of IRC 2021, organized by section number. Each entry covers what the code requires, why it exists, what inspectors look for, and common mistakes.

ED IRC 2018 ED IRC 2021 ED IRC 2024
§ 01   Sections

All 10 entries.

Sorted by section number. Click any row for the full entry — answer, requirements, edition diff, related sections.

Cross-Connections Must Be Eliminated or Protected Against Backflow
P2902.1
What counts as a plumbing cross-connection in a house?
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Hose Bibbs Need Backflow Protection Except for Limited Code Exceptions
P2902.4.3
Do outside hose bibbs need vacuum breakers?
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Irrigation Systems Need Approved Backflow Protection
P2902.5.3
Does a sprinkler system need a backflow preventer?
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Residential Water Systems Need Adequate Pressure at Fixtures
P2903.3
What is the minimum water pressure required by IRC?
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High Water Pressure Requires Pressure Regulation
P2903.3.1
Does code require a pressure reducing valve over 80 psi?
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Quick-Closing Valves Need Water Hammer Arrestors
P2903.5
Are water hammer arrestors required by IRC?
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Water Service Pipe Size Must Support the Whole Dwelling Load
P2903.7
What size water service pipe do I need for a house?
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Hot Water Distribution Must Limit Wasted Water Where the IRC Requires It
P2905.1
How far can a fixture be from the water heater under IRC?
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Hot Water Recirculation Systems Need Controls and Proper Piping
P2905.2
What does code require for a hot water recirculation system?
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Water Distribution Pipe Must Be Approved for Potable Water
P2906.5
What pipe materials are allowed for residential water supply?
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§ 02   Chapter navigation