New pool owner. My PB is proposing using a 1Hp single speed Hayward Super Pump. My pool is around 17,000 gallons. He is also proposing a Hayward 300# sand filter with a maximum flow rate of 62 GPM. Plumbing will be 1 !/2" with two skimmers, three returns and main drain, 16' x 32' pool with 6'...