Assertion: filter | /r/HasProperty | drained
Facets:
Source sentences:
text: When the filter is drained or backwashed, the dirty water passes through a canvas strainer bag inside a small tank before reaching the sewers or storm drains.
text: This type of filter may also include a sensor, which will alert the operator when the filter needs to be drained.
text: This type of filter may also include a sensor, which will alert the operator when the filter needs to be drained.