The valve further includes a second diaphragm cooperating with the first diaphragm to enclose {HEAD ~ a chamber} formed within {TAIL ~ the valve body} 
The valve further includes a second diaphragm cooperating with the first diaphragm to enclose { HEAD ~ a chamber } formed within { TAIL ~ the valve body }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL