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