I am looking for help in choosing a replacement pump. My old pump is a Hayward 1HP pump (single speed). It has an AO Smith motor Model C48L2N134D2, Serial Number 30508FM, RMP 3450, Amp 18 6/9.3. My pool is 45,000 gallons with an average of 37 1/2 feet of head. My filter is a Hayward 300...