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