Hello everyone! I am Alan. I have a 1989 24x48 fox vinyl liner pool, 8ft deep end and 3.5 shallow end. I have been told the pool is 44,000 gallons by one company and 47,000 by another. The plumbing is all 1.5 inch pvc. On the suction side there are 2 skimmers and one main drain. On the return: 2...