A valve body formed from {TAIL ~ a single piece} of pliable material is mounted in {HEAD ~ the passage} of the housing 
A valve body formed from { TAIL ~ a single piece } of pliable material is mounted in { HEAD ~ the passage } of the housing
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH