I live in Southeast Idaho, an area with all four seasons. I have an in-ground pool with PVC plumbing which was sort of hacked together by the former owner. The system includes a solar heater on the roof, sand filter, and SWG (Saltwater Generator), 1HP pump.
A former contractor friend suggested I replace the aging, patched-up pipes (the exposed ones near the control system, not the underground pipes) with ABS because it is apparently less vulnerable to cracking in the cold should some water remain, and is softer, allowing it to absorb some of the initial shock of pump's pressure when first activated.
A swimming pool professional, though a bit used-car-salesmanesque, said PVC is "the best". Which, if either, of these are most appropriate for low-maintenance long-term use?