The valve member substantially prevents fluid from flowing: from {TAIL ~ the third port} to the first port; from the second port to the first port; from the third port to the second port; and directly from the first port to {HEAD ~ the third port} 
The valve member substantially prevents fluid from flowing : from { TAIL ~ the third port } to the first port ; from the second port to the first port ; from the third port to the second port ; and directly from the first port to { HEAD ~ the third port }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD