Uniformat D4010

Sprinkler system, wet pipe

Also called wet system, sprinkler, wet sprinkler

Confidence C
Version 0.2.0 (permanent link)
Reviewed 2026-10-21

Service life

32.5 yearsmedian of the stated lives · sources say 20–50 years

Years in service. The band runs from the shortest to the longest life the sources state, so it shows how much they disagree, not how long 80% of units last. The line is the median of the stated lives.

Basis

50 years · CNA e-Tool Estimated Useful Life Table, p14 · HUD CNA 3.6.1.1 “Building fire suppression sprinklers, standpipes” — U.S. Department of Housing and Urban Development (planning life)
Same life for family and elderly properties. US multifamily housing. Neither HUD nor the municipal rows separate wet from dry systems.
25 years · The Blue Mountains: POL.COR.19.04 Tangible Capital Assets Policy, p11 · “Sprinkler System” (accounting life)
Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
40 years · Grey Highlands: By-law No. 2026-052, Tangible Capital Asset Policy A09-F-03, p11 · “Sprinkler System” (accounting life)
Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
25 years · Meaford: By-law 2020-83, Tangible Capital Asset Policy, Appendix A Estimated Useful Lives, p17 · “Fire Protection - Sprinkler System” (accounting life)
Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
20 years · Amherstburg: Tangible Capital Assets Policy, Appendix A: TCA Categories, Life Years, and Thresholds, p8 · “Plumbing - Sprinkler System” (accounting life)
Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
50 years · Parksville: Policy No. 6.16 Tangible Capital Assets, p9 · “Sprinkler System” (accounting life)
Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.

How sources are chosen and recorded: sourcing policy.

Municipal lives for fire protection (D40)

16 municipalities in British Columbia and Ontario state a life for fire protection as a whole, in 10 distinct tables: 15–50 years, median 20. These come from capital asset policies: accounting lives, used for amortization. They describe the system rather than this component, and none is a measured life.

Years. Each dot is one stated life and each bar a stated range; equal values stack. The dashed line is the median. Policies that copy the same table count once.

All 16 stated lives

Municipality	As written	Years	Kind	Source
Fort St. James, Revelstoke, Rossland, Tumbler Ridge · same table	Electrical/Plumbing/Fire	15–20	accounting	p5, p9, p7, p5 · 2010
Okanagan-Similkameen	Electrical/Plumbing/Fire	15–20	accounting	p11 · 2023
Salmo	Electrical/Plumbing/Fire	15–20	accounting	p6 · 2016
Parksville	Fire Suppression	20	accounting	p9 · 2023
Telkwa	Electrical/Plumbing/Fire	20	accounting	p8
Amherstburg	Fire Safety - Control Panel, Smoke Detectors	20	accounting	p8 · 2026
Amherstburg	Plumbing - Sprinkler System	20	accounting	p8 · 2026
Grey Highlands	Fire Alarms	20	accounting	p11 · 2026
The Blue Mountains	Fire Alarms	20	accounting	p11 · 2019
Bancroft, Centre Hastings, Hastings Highlands, Wollaston · same table	Sprinkler/Fire System	20–25	accounting	p5, p4, p6, p5
Parksville	Fire Protection	20–50	accounting	p9 · 2023
Meaford	Fire Protection - Sprinkler System	25	accounting	p17 · 2020
Meaford	Fire Protection - Alarm Panel	25	accounting	p17 · 2020
The Blue Mountains	Sprinkler System	25	accounting	p11 · 2019
Grey Highlands	Sprinkler System	40	accounting	p11 · 2026
Parksville	Sprinkler System	50	accounting	p9 · 2023

Each row was matched to its page automatically: the label and the number appear in the text of the cited page. An editor has not yet compared every row with the table, so follow the page link before relying on one. About the policies · All approved rows as JSON

Preventive maintenance

No maintenance tasks are sourced for this component yet.

Open questions

The sources disagree by a factor of two (20 to 50 years). Do the shorter municipal lives reflect accounting choices or real replacement?
HUD gives planning lives for US multifamily housing; the municipal rows are Ontario accounting lives. Neither is observed replacement data.
No preventive maintenance tasks are sourced yet.

Know the answer? Send it with a source to [email protected].

Cite this

Citation

unfinished.one (2026). Sprinkler system, wet pipe, v0.2.0. https://unfinished.one/c/sprinkler-wet/v/0.2.0

BibTeX

@misc{unfinished_sprinkler_wet_0_2_0,
  title = {Sprinkler system, wet pipe},
  author = {{unfinished.one}},
  year = {2026},
  version = {0.2.0},
  url = {https://unfinished.one/c/sprinkler-wet/v/0.2.0},
  note = {CC BY 4.0}
}

Licence CC BY 4.0 · How to cite · JSON · Versions: 0.2.0, 0.1.0