The apparatus comprises a pressure pump and a valve coupled together in fluid communication with each other and wherein {HEAD ~ the pressure pump} has {TAIL ~ an inlet} coupled in fluid communication with an air source and the valve has an outlet coupled in fluid communication with the drain 
has
The apparatus comprises a pressure pump and a valve coupled together in fluid communication with each other and wherein { HEAD ~ the pressure pump } has { TAIL ~ an inlet } coupled in fluid communication with an air source and the valve has an outlet coupled in fluid communication with the drain
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH