Glad to be registered here finally, been lurking and reading for awhile.
I work on an inground plaster 40 X 80 144,000 gallon main pool with a 3,000gallon wading pool, surrounded by huge oak and pine trees in a west Texas oasis called Buffalo Gap. This pool was built in 1985, *inside* the original 55 x 110, 300,000gal pool which was originally built somewhere around 1925.
The original pool had no filtration / circulation, just a well pump w/ bromine injector that went to the shallow end and an overflow at the deep end. After 60 years of that, the State Health Dep't finally said we had to update, so the current system was built.
The current system consists of 2 pumps (1 old Challenger bronze open-face impeller and 1 newer Challenger II plastic closed impeller) and 2 large Pentair Triton 140 sand filters for the main pool, and one 3/4hp pump and filter on the wading pool. All pumps run pretty much 24/7 during the season. Off season, we shut everything down and pull a gigantic tarp over the pool and put it to bed.
Anyways, just wanted to introduce meself.