Should the first filter member become clogged, {TAIL ~ the oil pressure} will rise above {HEAD ~ a safe value} 
Should the first filter member become clogged , { TAIL ~ the oil pressure } will rise above { HEAD ~ a safe value }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD