Uniformat G3020

Sanitary manhole

Also called sewer manhole, maintenance hole

• Confidence C
• Version 0.3.0 (permanent link)
• Reviewed 2026-10-22

This is version 0.3.0. 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 · Kenora: AF-6-1 Tangible Capital Asset Policy (By-law 34-2026), p18 · “Wastewater Mains - Manholes” (accounting life)
  Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
• 75 years · Kingston: Tangible Capital Assets Policy, p16 · “Sewer Utility - Sewer - manholes” (accounting life)
  Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
• 60 years · Prince Edward: FIN-12 Tangible Capital Assets Policy, p34 · “Sewer - Manholes (Pooled)” (accounting life)
  Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
• 60 years · Design standards: employer's requirements – Technical Manual (ER-DFE-XX-XX-T-X-0201, revision A-C01), p222 · 5.2.4 “Below ground drainage and manholes: 60 years” — Department for Education (England) (design life)
  Printed page 222. On-site below-ground drainage and manholes of a school, not a municipal network; foul or surface water not stated. Minimum life expectancy (design requirement) for DfE-funded school buildings. Minimum design requirements placed on contractors for school buildings, not observed replacement ages. Section 5.1.4 (sanitaryware) refers to CIBSE Guide M Appendix 12.A1 'in general'.
• 50 years · General depreciation rates (IR265), July 2021, p46 · BUIL “Manholes” — Inland Revenue (Te Tari Taake), New Zealand (accounting life)
  Printed page 46. Manholes, service not stated. Buildings and structures category. Printed DV 4%, SL 3%. 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

2 tasks in 1 work order.

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

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

• Every source here is a published planning, design or accounting life. None is observed replacement data.
• Some maintenance intervals come from TM 5-692-1, an Army manual for mission-critical (C4ISR) facilities; they may be tighter than typical commercial practice.

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

Cite this

Citation

unfinished.one (2026). Sanitary manhole, v0.3.0. https://unfinished.one/c/sanitary-manhole/v/0.3.0

BibTeX

@misc{unfinished_sanitary_manhole_0_3_0,
  title = {Sanitary manhole},
  author = {{unfinished.one}},
  year = {2026},
  version = {0.3.0},
  url = {https://unfinished.one/c/sanitary-manhole/v/0.3.0},
  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