In some embodiments, {TAIL ~ the valve member} has a first sealing surface for selectively substantially preventing fluid flow through the first port and a second sealing surface for selectively substantially preventing {HEAD ~ fluid flow} through the third port 
In some embodiments , { TAIL ~ the valve member } has a first sealing surface for selectively substantially preventing fluid flow through the first port and a second sealing surface for selectively substantially preventing { HEAD ~ fluid flow } through the third port
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 HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH