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