Hi Guys, the house i bought has the pressure tank in what is now the spare room (after i gutted everything and framed and what not). Currently in the stage of putting in the drop ceiling since this is in the basement but i need to move the pressure tank first into the utility room. I have an indoor 2500 gallon water cistern with a pump, right now the pressure tank as mentioned in one of the spare room downstairs about 15ft away from the pump. Its the original tank from the 1970's so im looking to replace it with a similiar sized unit im pretty sure it has a 1" inlet/outlet and the previous owner had it hooked up to a 3/4" ID piece of oldschool pex. I was planning on reusing the Pex with a coupling right there and a new length of pex and additional 20FT to the furnace room. Is reducing the 3/4" from 1" for a 40FT length going to matter? The other option is to replace the whole section with 1" pex but that is harder since i need to move some ceiling tiles around to get to the pump/indoor cistern.