I had a 200 foot well drilled. 1.5 hp pump 20 gpm. Well driller ran sched 80 1 inch up and out well. We tested the output after the pressure tank at about 30 gpm. it also has a csv installed before the tank. Heres my questions i'm running 300 foot of pvc pipe to a new 9000 foot building 6 bathrooms semi commercial kitchen. Is 1.5 inch pipe big enough. Well driller said 1 1/4 but does not seem big enough. Next question coming of the 300 foot main line i was going to tee off to my garage 100 foot on the way to building has 1 small bathroom, will rarely be used. Or should i tee off at the pressure tank run separate line to garage. Does it matter? I just want to have adequate pressure and volume. Im a journeyman plumber have done many residential homes just nothing this big and off a well.