we have a new soft sided AGP from Sams 20' x 4'. It came with a thru the wall skimmer with a cartridge filter inside it and the small pump attached to the bottom of the skimmer. we would like to upgrade to a sand filter system. what we have on hand is and old sand filter system that was from our previous much larger pool 24' x 52". it has 1.5 hp motor (AO Smith), purex triton Meteor 22" high rate sand filter product # 588100 filter area 2.5 SQ. FT. flow rate at 20 gpm per SQ. FT or 50 GPM. it has an 8 position Head (handle) American products no model # but a label # 96734200 what we do know for sure is at the 3 points where hoses attach appear to be cracked. we would like to replace this head housing or repair if possible any thought on this would be helpful such as is this unit 2 big for the pool we have now? if not is it worth the new head. Thanks in advance!