I just opened my pool (yes I know its late in the season) and am having water flow problems. I am not a new pool owner and in fact this inground (18'x36') pool is 10 years old. I have never ever had pool closing or opening issues and have performed these events myself. After opening the pool, removing plugs and reconnecting everything I filled the filter with water and even filled the suction lines with water which took about 10 minutes utilizing the garden hose. After trying to fill the lines and filter it was time to start it up. In previous openings it usually took about 90-120 seconds for the pump to be fully primed and for a good water flow and pressure to be established. This year, NO GO! After running the pump for 5+ minutes (and after multiple tries trying other things too) there is no water flow. I removed the pump skimmer cover and placed my hand inside with the pump running to feel for suction and there is some minor suction there. With everything restored to normal and with the pump running I placed my hand over the sucion inlet in the main skimmer and there is no suction. I am curious if there is a vapor lock. If so I am not sure how to puge this lock. This has never happened in the 10 years of opening this pool so I am doubtful that this is the case now. I am wondering if the filter head is malfunctioning and when in the filter position, it is not actually in the proper position. I have tried backwash, recirculate, clean, etc., etc., and there does not seem to be any function whatsoever, and again, there is no water flow whatsoever. I tried using my powerful blower (this is the blower I use to winterize and blow out all the lines) to blow air from the pump skimmer basket to the main skimmer basket and discovered there is no obstructions and there is no clog, there as air rapidly comming from the skimmer during this process. So, if it is not a vapor lock (and again I am not too sure about this one) my only thoughts is the filter head and or possibly a bad pump even though it appears to be running fine. PLEASE HELP!!