Fluid communication from the system may thereafter occur along {HEAD ~ the second flow path} at {TAIL ~ the relief valve apparatus} opens in response to pressure buildup in the flow path 
at
Fluid communication from the system may thereafter occur along { HEAD ~ the second flow path } at { TAIL ~ the relief valve apparatus } opens in response to pressure buildup in the flow path
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH