{"id":"sewage-ejector","version":"0.4.0","classification":{"uniformat":"D2030"},"names":["Sewage ejector pump"],"aliases":["ejector pump","lift station"],"service_life":{"median_years":50,"range_years":[50,50],"range_basis":"source_spread"},"pm_tasks":[{"task":"Hose down pumps to remove sludge","frequency":"P6M","reference":"TM 5-692-1 Maintenance of Mechanical and Electrical Equipment at Command, Control, Communications, Computer, Intelligence, Surveillance, and Reconnaissance (C4ISR) Facilities: Recommended Maintenance Practices","url":"https://www.wbdg.org/FFC/ARMYCOE/COETM/tm_5_692_1.pdf","page":143,"checklist":"Table 18-3 Sewage lift station and sewage sump unit"},{"task":"Pull pumps; check seal oil, seals, bearings, cable, impeller and volute","frequency":"P1Y","reference":"TM 5-692-1 Maintenance of Mechanical and Electrical Equipment at Command, Control, Communications, Computer, Intelligence, Surveillance, and Reconnaissance (C4ISR) Facilities: Recommended Maintenance Practices","url":"https://www.wbdg.org/FFC/ARMYCOE/COETM/tm_5_692_1.pdf","page":143,"checklist":"Table 18-3 Sewage lift station and sewage sump unit"},{"task":"Megohm test between pump body and power leads","frequency":"P1Y","reference":"TM 5-692-1 Maintenance of Mechanical and Electrical Equipment at Command, Control, Communications, Computer, Intelligence, Surveillance, and Reconnaissance (C4ISR) Facilities: Recommended Maintenance Practices","url":"https://www.wbdg.org/FFC/ARMYCOE/COETM/tm_5_692_1.pdf","page":143,"checklist":"Table 18-3 Sewage lift station and sewage sump unit"},{"task":"Reinstall pumps and check rotation direction","frequency":"P1Y","reference":"TM 5-692-1 Maintenance of Mechanical and Electrical Equipment at Command, Control, Communications, Computer, Intelligence, Surveillance, and Reconnaissance (C4ISR) Facilities: Recommended Maintenance Practices","url":"https://www.wbdg.org/FFC/ARMYCOE/COETM/tm_5_692_1.pdf","page":143,"checklist":"Table 18-3 Sewage lift station and sewage sump unit"},{"task":"Check check valves work","frequency":"P1Y","reference":"TM 5-692-1 Maintenance of Mechanical and Electrical Equipment at Command, Control, Communications, Computer, Intelligence, Surveillance, and Reconnaissance (C4ISR) Facilities: Recommended Maintenance Practices","url":"https://www.wbdg.org/FFC/ARMYCOE/COETM/tm_5_692_1.pdf","page":144,"checklist":"Table 18-3 Sewage lift station and sewage sump unit"},{"task":"Check running amps against nameplate and overload settings","frequency":"P6M","reference":"TM 5-692-1 Maintenance of Mechanical and Electrical Equipment at Command, Control, Communications, Computer, Intelligence, Surveillance, and Reconnaissance (C4ISR) Facilities: Recommended Maintenance Practices","url":"https://www.wbdg.org/FFC/ARMYCOE/COETM/tm_5_692_1.pdf","page":144,"checklist":"Table 18-3 Sewage lift station and sewage sump unit"},{"task":"Remove sediment and sludge from wet pit or sump","frequency":"P3M","reference":"TM 5-692-1 Maintenance of Mechanical and Electrical Equipment at Command, Control, Communications, Computer, Intelligence, Surveillance, and Reconnaissance (C4ISR) Facilities: Recommended Maintenance Practices","url":"https://www.wbdg.org/FFC/ARMYCOE/COETM/tm_5_692_1.pdf","page":144,"checklist":"Table 18-3 Sewage lift station and sewage sump unit"},{"task":"Clean float switches and check pump sequence","frequency":"P3M","reference":"TM 5-692-1 Maintenance of Mechanical and Electrical Equipment at Command, Control, Communications, Computer, Intelligence, Surveillance, and Reconnaissance (C4ISR) Facilities: Recommended Maintenance Practices","url":"https://www.wbdg.org/FFC/ARMYCOE/COETM/tm_5_692_1.pdf","page":144,"checklist":"Table 18-3 Sewage lift station and sewage sump unit"},{"task":"Check control panel for moisture or corrosion","frequency":"P3M","reference":"TM 5-692-1 Maintenance of Mechanical and Electrical Equipment at Command, Control, Communications, Computer, Intelligence, Surveillance, and Reconnaissance (C4ISR) Facilities: Recommended Maintenance Practices","url":"https://www.wbdg.org/FFC/ARMYCOE/COETM/tm_5_692_1.pdf","page":144,"checklist":"Table 18-3 Sewage lift station and sewage sump unit"}],"basis":[{"type":"public_document","life_type":"planning","title":"CNA e-Tool Estimated Useful Life Table","by":"U.S. Department of Housing and Urban Development","url":"https://www.hud.gov/sites/documents/eul_for_cna_e_tool.pdf","page":9,"code":"HUD CNA 3.4.1.1.7","label":"Sewage Ejectors","years":50,"note":"Same life for family and elderly properties. US multifamily housing."}],"confidence":{"grade":"C","sample_size":null},"open_questions":["HUD's 50 years for sewage ejectors may describe the basin and piping rather than the pump. Pump lives need a second source.","Only one source so far: HUD planning lives for US multifamily housing. Canadian and observed sources are needed.","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."],"contributors":["unfinished.one editors"],"last_reviewed":"2026-10-22","canonical_url":"https://unfinished.one/c/sewage-ejector","versioned_url":"https://unfinished.one/c/sewage-ejector/v/0.4.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Sewage ejector pump, v0.4.0. https://unfinished.one/c/sewage-ejector/v/0.4.0"}