Uniformat D2020
Backflow preventer
4 preventive maintenance tasks for backflow preventer, from published sources. No source that meets our sourcing policy states a service life yet.
Also listed as BFP, RPZ, DCVA, double check valve
Service life
No service life yet. No published source that meets our sourcing policy states a life for this component, so we give none rather than guess. The maintenance tasks below are sourced. Know a public-domain or openly licensed source? Send it to [email protected].
Municipal lives for plumbing (D20)
26 municipalities in Ontario and British Columbia state a life for plumbing as a whole, in 18 distinct tables: 15–50 years, median 25. 34 rows come from capital asset policies (accounting lives, used for amortization) and 1 from asset management plans (planning lives, used to forecast replacement). 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. Hollow marks are planning lives from asset management plans; filled marks are accounting lives from policies. The dashed line is the median. Policies that copy the same table count once.
All 27 stated lives
| Municipality | Covers | Years | Kind | Source |
|---|---|---|---|---|
| Kingston | Plumbing | 15 | accounting | p15 · 2016 |
| Meaford | Plumbing | 15 | accounting | p17 · 2020 |
| Trent Lakes | Plumbing | 15 | accounting | p10 · 2009 |
| Fort St. James, Revelstoke, Rossland, Sicamous, Tumbler Ridge · same table | Plumbing, Fire protection, Electrical | 15–20 | accounting | p5, p9, p7, p9, p5 · 2010 |
| Okanagan-Similkameen | Plumbing, Fire protection, Electrical | 15–20 | accounting | p11 · 2023 |
| Salmo | Plumbing, Fire protection, Electrical | 15–20 | accounting | p6 · 2016 |
| Comox Valley | Plumbing, HVAC, Electrical | 20 | accounting | p6 · 2010 |
| Cranbrook | Plumbing, HVAC, Electrical | 20 | accounting | p9 · 2010 |
| Telkwa | Plumbing, Fire protection, Electrical | 20 | accounting | p8 |
| London | Plumbing, HVAC, Electrical | 20 | accounting | p2 · 2023 |
| Meaford | Plumbing | 20 | accounting | p16 · 2020 |
| Meaford | Plumbing | 20 | accounting | p17 · 2020 |
| Lantzville | Plumbing, HVAC, Electrical | 25 | accounting | p11 · 2019 |
| Meaford | Plumbing | 25 | accounting | p17 · 2020 |
| Rainy River | Plumbing, Electrical | 25 | accounting | p11 · 2010 |
| Rainy River | Plumbing, Electrical | 25 | planning | p17 · 2026 |
| The Blue Mountains | Plumbing | 25 | accounting | p11 · 2019 |
| Bancroft, Centre Hastings, Hastings Highlands, Wollaston · same table | Plumbing, Electrical | 25–30 | accounting | p5, p4, p6, p5 |
| Greater Napanee | Ice plant brine chiller | 30 | accounting | p16 · 2012 |
| Grey Highlands | Plumbing | 30 | accounting | p11 · 2026 |
| The Blue Mountains | Plumbing | 30 | accounting | p11 · 2019 |
| Trent Lakes | Plumbing | 30 | accounting | p10 · 2009 |
| Parksville | Plumbing | 50 | accounting | p9 · 2023 |
| Greater Madawaska, Quinte West · same table | Plumbing | 50 | accounting | p17, p38 · 2025 |
| Meaford | Plumbing | 50 | accounting | p16 · 2020 |
| Meaford | Plumbing | 50 | accounting | p16 · 2020 |
| The Blue Mountains | Plumbing | 50 | accounting | p11 · 2019 |
Of 35 rows, 2 were compared with an image of their page; 33 were matched to their page automatically (the label and number appear in the page text). Follow the page link before relying on an automatically matched row. About the policies · All approved rows as JSON
Preventive maintenance
4 tasks in 2 work orders. Intervals that fall due together are one visit: the every 5 years visit also covers the annual tasks.
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 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.
Annual · 3 tasks
| Task | Source |
|---|---|
| Disassemble RP backflow preventer and inspect seals and seats | TM 5-692-1 Maintenance of Mechanical and Electrical Equipment at Command, Control, Communications, Computer, Intelligence, Surveillance, and Reconnaissance (C4ISR) Facilities: Recommended Maintenance Practices, p99 |
| Test backflow preventer after servicing | TM 5-692-1 Maintenance of Mechanical and Electrical Equipment at Command, Control, Communications, Computer, Intelligence, Surveillance, and Reconnaissance (C4ISR) Facilities: Recommended Maintenance Practices, p99 |
| Full flow test backflow preventer at system demand | UFC 3-601-02 Fire Protection Systems Inspection, Testing, and Maintenance (7 October 2021, with Change 1, 18 April 2025), p46 |
Every 5 years · 1 task
Source: UFC 3-601-02 Fire Protection Systems Inspection, Testing, and Maintenance (7 October 2021, with Change 1, 18 April 2025), Table 2-8 Backflow Prevention Device ITM Tasks
| Task | Page |
|---|---|
| Inspect backflow assembly internally | p46 |
Frequencies are ISO 8601 durations in the data (P3M = every 3 months).
Open questions
- No service life yet: no published source that meets the sourcing policy states one. The maintenance tasks are sourced.
- 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). Backflow preventer, v0.1.0. https://unfinished.one/c/backflow-preventer/v/0.1.0BibTeX
@misc{unfinished_backflow_preventer_0_1_0,
title = {Backflow preventer},
author = {{unfinished.one}},
year = {2026},
version = {0.1.0},
url = {https://unfinished.one/c/backflow-preventer/v/0.1.0},
note = {CC BY 4.0}
}Licence CC BY 4.0 · How to cite · JSON · Versions: 0.1.0