bucmeister,
The pipes are for various things. I need to bring power out for A/C and power for my septic mound system, cooling lines in and out for A/C, Liquid Propane for heating, low voltage for A/C unit, exhaust for furnace, exhaust for water heater. I didn't plan on using all of them, but figured it would be easier to put them in before the concrete was poured than after the fact. Although, the contractor forgot the dryer vent. He said that it took longer to set up the hole saw than it did to put the hole in the wall. I marked the spot for him and he hit an intersection of rebar.