{"id":"pump-base-mounted","version":"0.1.0","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":[15,20],"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":"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."}],"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":"2026-10-21","canonical_url":"https://unfinished.one/c/pump-base-mounted","versioned_url":"https://unfinished.one/c/pump-base-mounted/v/0.1.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Pump, base-mounted end suction, v0.1.0. https://unfinished.one/c/pump-base-mounted/v/0.1.0"}