The suction channel being configured to receive {HEAD ~ a valve member} that controls flow through {TAIL ~ the suction channel} 
The suction channel being configured to receive { HEAD ~ a valve member } that controls flow through { TAIL ~ the suction channel }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL