Wow, I am completely stalled in trying to choose a pump for a new 18x33 AGP. There seems to be some difference of opinion on whether you can use an inground pump on an AGP. Since I have to narrow the many choices anyway, and do not want to have to second guess myself in the future, I have decided to consider only pumps specifially designed for AGP (as stated by manufacturer).
But, now what. I am hoping to avoid having to completely comprehend the hydraulics 101 and choosing a pump stickies. From what I understand so far, it appears that AGP have an approximate head pressure of about 30 feet, and I need a 1/2 hp pump to turn over the water (appr. 14,500 gallons) once in 8 hours, assuming appr. 30 gpm min flow and 42 gpm max (from the 22" sand filter). I am also assuming I will be using 1 1/2" flexible pipes. I also plan to have solar panels mounted at ground level.
Energy efficiency (operating costs) is a primary concern so I am looking to stay wih these smaller pumps. Will they have enough power to operate the cleaners, or will I need a 2 speed pump? I don't seem to be able to find any 1/2hp 2-speed pumps. I have found some 3/4hp 2 speed pumps, but off hand I do not recall if they are for ABP's.
Can anyone just recommend some 1/2 hp pumps for AGP? Is the Pentair Dynamo a decent pump? Hayward makes a Powerflo pump that does not list the hp, but simply states it is 40 gpm. I am not sure why they classify this pump differently from the others.
Thanks in advance.