{TAIL ~ The backflush pump} draws the backflush fluid from {HEAD ~ the reservoir} at a defined time 
{ TAIL ~ The backflush pump } draws the backflush fluid from { HEAD ~ the reservoir } at a defined time
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH