{"id":"pump-inline-circulator","version":"0.3.0","classification":{"uniformat":"D3040"},"names":["Pump, inline circulator"],"aliases":["circulator","circ pump","inline pump"],"service_life":{"median_years":15.25,"range_years":[10.5,20],"range_basis":"source_spread"},"pm_tasks":[{"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":"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":"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 Circulator Pumps (final rule), 89 FR 44464, May 20, 2024","by":"U.S. Department of Energy","url":"https://www.govinfo.gov/content/pkg/FR-2024-05-20/pdf/2024-07873.pdf","page":3,"label":"\"the average lifetime of circulator pumps, which is estimated to be 10.5 years\"","years":10.5,"note":"Printed page 44466. all circulator pumps, overall average across varieties."}],"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-inline-circulator","versioned_url":"https://unfinished.one/c/pump-inline-circulator/v/0.3.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Pump, inline circulator, v0.3.0. https://unfinished.one/c/pump-inline-circulator/v/0.3.0"}