I have an underground sprinkler system on my monstrous estate. All 2 acres of it. I get irrigation water which I run into a small pond and then pump from it. I run around 140 gallon a minute from a 5hp electric pump. I just replaced the pump a couple of years ago to the tune of $1600 dollars. It has a hand priming pump and a dredge foot-valve on the suction line. The pump has a float valve to shut it off if I loose water. The pump has a ceramic seal just like a dredge pump so I try not to run it dry. The other day the pump ran dry and didn't shut off. It may have ran a couple of hours dry. When I got water I expected it not to prime and pump but I guess someone figured I had enough adverse happenings this year and everything worked fine.The lawn is getting watered as I type.
Leonard