Uniformat D4010

Sprinkler system, wet pipe

Also called wet system, sprinkler, wet sprinkler

• Confidence C
• Version 0.4.0 (permanent link)
• Reviewed 2026-10-22

This is version 0.4.0. The latest is 0.5.0.

Service life

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.
• 25 years · General depreciation rates (IR265), July 2021, p44 · BDFO “Sprinkler systems” — Inland Revenue (Te Tari Taake), New Zealand (accounting life)
  Printed page 44. Sprinkler systems, wet or dry not stated. BDFO Building fit-out (when in books separately from building cost). Same life under FACT p.48. Printed DV 8%, SL 6%. Tax depreciation lives set by the Commissioner of Inland Revenue for New Zealand income tax, not engineering or asset-management lives; they are banded and often short (e.g. reticulation piping 25 years). The July 2021 edition was the newest PDF reachable; the online Depreciation Rate Finder may hold later determinations.

How sources are chosen and recorded: sourcing policy.

Preventive maintenance

23 tasks in 5 work orders. Intervals that fall due together are one visit: the every 10 years visit also covers the monthly, annual, every 2 years and every 5 years tasks.

1. 1Monthly
2. 2Monthly
3. 3Monthly
4. 4Monthly
5. 5Monthly
6. 6Monthly
7. 7Monthly
8. 8Monthly
9. 9Monthly
10. 10Monthly
11. 11Monthly
12. 12Annual

Months from the schedule start. Download the tasks as CSV for a CMMS, or ask the MCP tool get_pm_schedule for dated visits.

Frequencies are ISO 8601 durations in the data (P3M = every 3 months).

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?
• Every source here is a published planning, design or accounting life. None is observed replacement data.

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

Cite this

Citation

unfinished.one (2026). Sprinkler system, wet pipe, v0.4.0. https://unfinished.one/c/sprinkler-wet/v/0.4.0

BibTeX

@misc{unfinished_sprinkler_wet_0_4_0,
  title = {Sprinkler system, wet pipe},
  author = {{unfinished.one}},
  year = {2026},
  version = {0.4.0},
  url = {https://unfinished.one/c/sprinkler-wet/v/0.4.0},
  note = {CC BY 4.0}
}

Licence CC BY 4.0 · How to cite · JSON · Versions: 0.5.0, 0.4.0, 0.3.0, 0.2.0, 0.1.0