{"id":"water-closet","version":"0.4.0","classification":{"uniformat":"D2010"},"names":["Water closet"],"aliases":["toilet","WC"],"service_life":{"median_years":40,"range_years":[40,40],"range_basis":"source_spread"},"pm_tasks":[{"task":"Check flushometer flush valves: flush time, diaphragm gasket condition and rating","frequency":"P1Y","reference":"Technical Operations and Maintenance Guidelines on Common Water Equipment","url":"https://www.energy.gov/cmei/femp/technical-operations-and-maintenance-guidelines-common-water-equipment","checklist":"Toilets and Urinals table"},{"task":"Check tank water level and that the fill valve shuts off","frequency":"P1Y","reference":"Technical Operations and Maintenance Guidelines on Common Water Equipment","url":"https://www.energy.gov/cmei/femp/technical-operations-and-maintenance-guidelines-common-water-equipment","checklist":"Toilets and Urinals table"},{"task":"Dye-test the flapper valve for leaks","frequency":"P1Y","reference":"Technical Operations and Maintenance Guidelines on Common Water Equipment","url":"https://www.energy.gov/cmei/femp/technical-operations-and-maintenance-guidelines-common-water-equipment","checklist":"Toilets and Urinals table"},{"task":"Check automatic flush sensors; calibrate if double flushing","frequency":"P1Y","reference":"Technical Operations and Maintenance Guidelines on Common Water Equipment","url":"https://www.energy.gov/cmei/femp/technical-operations-and-maintenance-guidelines-common-water-equipment","checklist":"Toilets and Urinals table"}],"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":11,"code":"HUD CNA 3.4.1.3.5","label":"Toilets/bidets/urinals","years":40,"note":"Same life for family and elderly properties. US multifamily housing."}],"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.","Aimed at water efficiency in federal facilities, not full fixture maintenance."],"contributors":["unfinished.one editors"],"last_reviewed":"2026-10-22","canonical_url":"https://unfinished.one/c/water-closet","versioned_url":"https://unfinished.one/c/water-closet/v/0.4.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Water closet, v0.4.0. https://unfinished.one/c/water-closet/v/0.4.0"}