In {TAIL ~ addition}, a manual reset switch requires {HEAD ~ human intervention} to re activate the reservoir pump once the blockage condition is removed 
In { TAIL ~ addition } , a manual reset switch requires { HEAD ~ human intervention } to re activate the reservoir pump once the blockage condition is removed
OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH