{"id":"water-closet","version":"0.6.0","classification":{"uniformat":"D2010"},"names":["Water closet"],"aliases":["toilet","WC"],"service_life":{"median_years":27.5,"range_years":[15,40],"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."},{"type":"public_document","life_type":"accounting","title":"Circular No. A-76 Revised Supplemental Handbook: Performance of Commercial Activities, Appendix 3 Useful Life and Disposal Value (March 1996)","by":"Executive Office of the President, Office of Management and Budget (values estimated by the Defense Logistics Agency)","url":"https://www.whitehouse.gov/wp-content/uploads/legacy_drupal_files/omb/circulars/A76/a076supp.pdf","page":52,"code":"FSC 4510","label":"Plumbing Fixtures and Accessories, Expected Useful Life 15 (years)","years":15,"note":"Printed page 48. Supply class covering plumbing fixtures generally (fixture type not separated). Drinking fountains and water coolers are not mapped because their supply class is not certain."}],"confidence":{"grade":"C","sample_size":null},"open_questions":["Every source here is a published planning, design or accounting life. None is observed replacement data.","Aimed at water efficiency in federal facilities, not full fixture maintenance."],"contributors":["unfinished.one editors"],"last_reviewed":"2026-10-23","canonical_url":"https://unfinished.one/c/water-closet","versioned_url":"https://unfinished.one/c/water-closet/v/0.6.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Water closet, v0.6.0. https://unfinished.one/c/water-closet/v/0.6.0"}