{"id":"pump-base-mounted","version":"0.2.0","classification":{"uniformat":"D3040"},"names":["Pump, base-mounted end suction"],"aliases":["end suction pump","base mounted pump","HWP","CHWP"],"service_life":{"median_years":17.5,"range_years":[10,20],"range_basis":"source_spread"},"pm_tasks":[{"task":"Shut down or re-sequence pumps that are not needed","frequency":"P1D","reference":"Operations & Maintenance Best Practices: A Guide to Achieving Operational Efficiency, Release 3.0","url":"https://www.energy.gov/sites/default/files/2020/04/f74/omguide_complete_w-eo-disclaimer.pdf","page":231,"checklist":"9.9.11 Pumps Checklist"},{"task":"Do an overall visual inspection: all equipment operating and safety systems in place","frequency":"P1D","reference":"Operations & Maintenance Best Practices: A Guide to Achieving Operational Efficiency, Release 3.0","url":"https://www.energy.gov/sites/default/files/2020/04/f74/omguide_complete_w-eo-disclaimer.pdf","page":231,"checklist":"9.9.11 Pumps Checklist"},{"task":"Lubricate bearings per manufacturer","frequency":"P1M","reference":"Operations & Maintenance Best Practices: A Guide to Achieving Operational Efficiency, Release 3.0","url":"https://www.energy.gov/sites/default/files/2020/04/f74/omguide_complete_w-eo-disclaimer.pdf","page":231,"checklist":"9.9.11 Pumps Checklist"},{"task":"Check packing for wear and repack as needed","frequency":"P1M","reference":"Operations & Maintenance Best Practices: A Guide to Achieving Operational Efficiency, Release 3.0","url":"https://www.energy.gov/sites/default/files/2020/04/f74/omguide_complete_w-eo-disclaimer.pdf","page":231,"checklist":"9.9.11 Pumps Checklist"},{"task":"Check pump/motor coupling alignment","frequency":"P1M","reference":"Operations & Maintenance Best Practices: A Guide to Achieving Operational Efficiency, Release 3.0","url":"https://www.energy.gov/sites/default/files/2020/04/f74/omguide_complete_w-eo-disclaimer.pdf","page":231,"checklist":"9.9.11 Pumps Checklist"},{"task":"Check and secure all pump mountings","frequency":"P1M","reference":"Operations & Maintenance Best Practices: A Guide to Achieving Operational Efficiency, Release 3.0","url":"https://www.energy.gov/sites/default/files/2020/04/f74/omguide_complete_w-eo-disclaimer.pdf","page":231,"checklist":"9.9.11 Pumps Checklist"},{"task":"Inspect bearings and drive belts for wear; adjust, repair or replace","frequency":"P1Y","reference":"Operations & Maintenance Best Practices: A Guide to Achieving Operational Efficiency, Release 3.0","url":"https://www.energy.gov/sites/default/files/2020/04/f74/omguide_complete_w-eo-disclaimer.pdf","page":231,"checklist":"9.9.11 Pumps Checklist"},{"task":"Check motor condition by temperature or vibration analysis","frequency":"P1Y","reference":"Operations & Maintenance Best Practices: A Guide to Achieving Operational Efficiency, Release 3.0","url":"https://www.energy.gov/sites/default/files/2020/04/f74/omguide_complete_w-eo-disclaimer.pdf","page":231,"checklist":"9.9.11 Pumps Checklist"}],"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":12,"code":"HUD CNA 3.4.2.2.8","label":"Hydronic/Water Circulating Pumps","years":20,"note":"Same life for family and elderly properties. US multifamily housing. HUD's row covers hydronic circulating pumps of any mounting."},{"type":"public_document","life_type":"design","title":"Design standards: employer's requirements – Technical Manual (ER-DFE-XX-XX-T-X-0201, revision A-C01)","by":"Department for Education (England)","url":"https://assets.publishing.service.gov.uk/media/6971f649d8adeaf266040501/ER-DFE-XX-XX-T-X-0201-Technical_Manual-A-C01.pdf","page":245,"code":"5.5.4","label":"Storage cylinders, valves and pumps: 20 years","years":20,"note":"Printed page 245. Heating and cooling system pumps (cylinders and valves not mapped). 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'."},{"type":"public_document","life_type":"planning","title":"Energy Conservation Program: Energy Conservation Standards for Pumps (final rule), 81 FR 4368, January 26, 2016","by":"U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy","url":"https://www.govinfo.gov/content/pkg/FR-2016-01-26/pdf/2016-00324.pdf","page":27,"code":"IV.F.2.g","label":"Equipment Lifetime: \"The average across all equipment classes was 15 years\"","years":15,"note":"Printed page 4394. All-class average for commercial and industrial clean-water pumps; brine pumps are outside DOE scope (clean water only) so the brine-pump match is loose."},{"type":"public_document","life_type":"accounting","title":"General depreciation rates (IR265), July 2021","by":"Inland Revenue (Te Tari Taake), New Zealand","url":"https://www.ird.govt.nz/-/media/project/ir/home/documents/forms-and-guides/ir200---ir299/ir265/ir265-2021.pdf","page":51,"code":"PUMP","label":"Centrifugal pumps","years":10,"note":"Printed page 51. Pumping sets (where not industry specified). End-suction base-mounted pumps are centrifugal pumps. Printed DV 20%, SL 13.5%. 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."}],"confidence":{"grade":"C","sample_size":null},"open_questions":["Every source here is a published planning, design or accounting life. None is observed replacement data."],"contributors":["unfinished.one editors"],"last_reviewed":"2026-10-22","canonical_url":"https://unfinished.one/c/pump-base-mounted","versioned_url":"https://unfinished.one/c/pump-base-mounted/v/0.2.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Pump, base-mounted end suction, v0.2.0. https://unfinished.one/c/pump-base-mounted/v/0.2.0"}