Assertion: septic tank | /r/HasProperty | periodic removal of the sludge
Facets:
value: every 2–3 years
type: TEMPORAL
Source sentences:
text: If proper maintenance is not carried out on your septic tank, which includes the periodic removal of the sludge every 2–3 years, the solids will have risen to the height of the exit pipe for the effluent fluids and travel with the liquids, unless there is an exit filter.