Assertion: water pump's pressure | /r/CreatedBy | the water column
Facets:
value: from the outlet
type: OTHER
Source sentences:
text: Initially, the waste valve  is open (i.e. lowered) because of its own weight, and the delivery valve  is closed under the pressure caused by the water column from the outlet .
text: The momentum of the water flow in the inlet pipe against the now closed waste valve causes a water hammer that raises the pressure in the pump beyond the pressure caused by the water column pressing down from the outlet.