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§ Chapter 26 IRC 2018

General Plumbing Requirements

10 entries from Chapter 26 of IRC 2018, 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.

Can a Sink or Toilet Drain Somewhere Other Than the Sewer or Septic System? (IRC 2018)
P2601.1
Can a sink or toilet drain somewhere other than the sewer or septic system?
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How Should Plumbing Pipes Through Roofs or Exterior Walls Be Sealed? (IRC 2018)
P2603.1
How should plumbing pipes through roofs or exterior walls be sealed?
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Do I Need Nail Plates Where Plumbing Goes Through Studs? (IRC 2018)
P2603.2.1
Do I need nail plates where plumbing goes through studs?
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Can I Drill Joists or Studs for Plumbing Pipes? (IRC 2018)
P2603.3
Can I drill joists or studs for plumbing pipes?
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Do Plumbing Pipes Need Sleeves Through Concrete Slabs or Foundation Walls? (IRC 2018)
P2603.3
Do plumbing pipes need sleeves through concrete slabs or foundation walls?
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Can Plumbing Pipes Touch Metal Framing, Concrete, or Other Materials? (IRC 2018)
P2603.4
Can plumbing pipes touch metal framing, concrete, or other materials?
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Can I Run Water Pipes in an Exterior Wall or Unheated Crawl Space? (IRC 2018)
P2603.5
Can I run water pipes in an exterior wall or unheated crawl space?
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Can I Backfill Around Plumbing Pipe with Rocks or Construction Debris? (IRC 2018)
P2604.1
Can I backfill around plumbing pipe with rocks or construction debris?
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How Often Do Plumbing Pipes Need Support Straps? (IRC 2018)
P2605.1
How often do plumbing pipes need support straps?
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Are S-Traps, Flexible Drains, or Sanitary Tees on Their Back Allowed? (IRC 2018)
P3005.1
Are S-traps, flexible drains, or sanitary tees on their back allowed?
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§ 02   Chapter navigation