Hi Y'all, Well, we've been here a year & a half. We are on city water. We have a well, with a Sears submersible pump. (box on the wall looks new). We had an old prsssure tank, outside the house, with a set of valves, hooked partially to it by broken PVC pipe. There was rotted garden hose hooked on both sides of the valves. There is a PVC pipe, through the basement wall, that was hooked to the house water system, with double valves for it & city water, but itno longer is. (I had it unhookedbecause I was unsure of it.) The pipe through the wall appears to go out directly to the well. The older couple that owned our Place are not capable of answering detailed questions on things around here. So now the questions....... I want to get a pressure tank, and valve set and get it hooked up. But, is there a chance that I do NOT need a pressure tank and valves? Could the Sears submersible pump be one of those "constant pressure pumps" that do not need a tank? Do I need to get a plumber/well man out here to check it out *before* I buy a tank & valves? If I need the pressure tank, how big should I get? There's only DSW & I all the time, but the Kids & grand-Kids are up here about once a month, for the day,4 more adults & 4 kids. Oh yeah, we have a two story house, including the basement & main floor. We have an automatic washer, and a dishwasher, too & I cook a lot, so there's a lot of dishes. So how big should the P.tank be & how much presssure? I'd like to get this together & working Thanks for any help you can give me. I need answers, before I do any thing.