I could be totally wrong about this, but after reading this post, I thought it just might be worth mentioning. After looking on Hayward's site, the information about the LX pump is as follows:

'The Power-Flo LX™ is a high-performance pump series designed for the rigors of above-ground and on-ground type swimming pools. Combining durable, corrosion-proof construction with advanced features and options, Power-Flo LX sets the standard for value and performance.

For above-ground and in-ground pools requiring self-priming action, Power-Flo II is the pool professional`s choice for superior performance and unparalleled quality.'

The reason I am copying this information from their site is......Since 'self priming' is not mentioned as a feature of the LX, could this mean that the pump is designed to operate only at below the waterline? I assume most AG pool pumps are below the water line, where I think, priming would not be an issue, or as much of one. Trust me, I'm no expert when it comes to pumps, so again, I could be way off base here, but after reading this, it sounds like maybe the LX isn't the right pump for the job. Is it possible to put the pump lower than the waterline outside the pool, at least until (if) the pumping begins? Just a thought.

Jason