Hello all -
I need to drain my pool to do some repairs under the liner. I'm trying to figure out how long it will take to drain the pool.
I have a Waterway 2 hp high flow pump. That said, it shows 150 gpm at 5ft of head. Am I correct in the following logic? I'm going to put this pump on the pool deck. I'll attache a hose to the intake and put it into the pool, which is about 4 feet deep. Then run the discharge hose off the deck, across the patio and down the driveway. The only real head involved is the 54" pool wall height. So, can I expect a little less, say 130-140 gpm?
Then since the pool is 15 x 30 and it's only filled to the return at this point, because it's in winter mode, there is roughly 48" of water in the pool. This works out to roughly 9,293 gallons. So, 9,293 gallons / 130gpm = 72 minutes to drain the pool or around 1hr 10 mins. Is this about right? sounds really fast to drain the pool.