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