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