Since {HEAD ~ the 5 micron filter backwash} is separate from {TAIL ~ the backwash} of the other filters, it can have a separate sensor and a separate cycle 
is separate from
Since { HEAD ~ the 5 micron filter backwash } is separate from { TAIL ~ the backwash } of the other filters , it can have a separate sensor and a separate cycle
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH