Assertion: water pump's pressure | /r/CapableOf | build up in the pump barrel
Facets:
value: to open the valves
type: PURPOSE
Source sentences:
text: This can be problematic if gas enters the pump, because it can result in what is known as gas locking, where insufficient pressure builds up in the pump barrel to open the valves (due to compression of the gas) and little or nothing is pumped.