My forage pond was looking scummy, and the creek is still flowing plenty of clear spring water, so decided to pump a while, and do a water change. I have made a new spot on the creek to pump that is about 140 feet closer and 4 feet less lift than times before for my 2" Honda pump. I had my wife there today with a stopwatch and we timed filling a 5 gallon bucket. The average of three tries was 2.6 seconds. That's with 350 feet of 2" pipe with a 12 foot total lift. The pipe is some utility grade with a teflon coating on the inside so it is very very slick so friction is very little. I get about 30% more water than I would through uncoated pipe, according to pump calculations. Pleasant surprise. Pump calcs showed about 81 GPM. Measured 115 GPM.