a condition indicator operatively connected to said ionization switch and {HEAD ~ said power supply} for indicating {TAIL ~ the operation} of said valve assembly 
for indicating
a condition indicator operatively connected to said ionization switch and { HEAD ~ said power supply } for indicating { TAIL ~ the operation } of said valve assembly
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH