I have a 250' well and need to replace the pump. I currently run a 1hp submersible pump. The pump that I need is not in stock so I am looking at a similar pump that only gives GPM performance up to 100' (18.4 GPM at 100'). Does this mean that it won't work at 250'??? I am looking for something that produces 7 - 10 GPM at 250'.