{"id":"pump-inline-circulator","version":"0.1.0","classification":{"uniformat":"D3040"},"names":["Pump, inline circulator"],"aliases":["circulator","circ pump","inline pump"],"service_life":{"median_years":20,"range_years":[20,20],"range_basis":"source_spread"},"pm_tasks":[],"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."}],"confidence":{"grade":"C","sample_size":null},"open_questions":["Only one source so far: HUD planning lives for US multifamily housing. Canadian and observed sources are needed.","No preventive maintenance tasks are sourced yet."],"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/0.1.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Pump, inline circulator, v0.1.0. https://unfinished.one/c/pump-inline-circulator/v/0.1.0"}