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21 Fire Suppression

Sub-sections in this division:

21 13 00 — Wet-Pipe Sprinkler Systems (Residential NFPA 13D)

Spec Entries — 3 results across all jurisdictions

City of Henderson Ventilation & Waterproofing View Source ↗

Air Sealing — Blower Door Test Required

Residential units in Climate Zone 3 must achieve 3.0 ACH50 via third-party blower door test. Alternatives: 4.0 ACH50 non-sprinklered, 4.5 ACH50 sprinklered. Qualifying air barriers include: 1/2 in gypsum board, 5/8 in Portland cement stucco, closed-cell spray foam (1.5 in min), and others per IECC C402.6.2.3.1.

IECC R402 / C402 (Climate Zone 3)

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City of Henderson Building Utilities View Source ↗

Plumbing — UPC Governs (IRC Chapters Deleted)

All residential plumbing is governed by the 2024 Uniform Plumbing Code (UPC) with Southern Nevada Amendments. IRC Chapters 25–33 and 24–43 are deleted and replaced by reference to UPC. IRC Section P2904 for residential fire sprinklers is retained.

IRC Amendment (local) / HMC Chapter 15.20

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City of North Las Vegas Building Structures View Source ↗

Mandatory Residential Fire Sprinklers — All New Single-Family

All new single-family home permits issued on or after January 5, 2026 require an automatic residential fire sprinkler system. Technical standard: IRC Section P2904 / NFPA 13D. Both Henderson (since 2011) and NLV (since Jan 5, 2026) now require sprinklers for all new residential construction.

NLV Municipal Code Section 15.72.010(B)

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