I have been getting bids on re-piping my house. It has 1 1/2 bath, 1430 sq ft, built in 1966 to give an idea. H2O Pressure is terrible and my well guy says the pipes are the problem. One plumber says just replace the horizontal pipes and another says do all, including up to the fixtures. I am on a well and the pipe which brings H2O to the garage holding tank is in the concrete foundation, one plumber says not to worry about that part. Shouldn't all the pipes be replaced or can you just do the horizontals? The bids so far range around 2K to 3K. When bids vary for the same work,with CPVC replacement..what are some questions to be asking? A plumber which my well guy referred will come out and bid but charges a hour minimum $58.00 to test each outside spout for pressure and check all the insides for clogs, etc. He says he tests for others problems, etc before replacing the pipes. Does that sound resonable? No one has done that before. They just look topically and bid.