Texas Plumbing Supply

Was told by a plumber to go to Texas Plumbing Supply to get fittings to run a water line from my well house to the house because I could save money if I did it myself. Specifically told the sales person I was running a water line. When I got the fittings I questioned them and was told "those are what I need". Now that I have installed 1000 ft of water line and had a joint blow out, I find out that they sold me low pressure fittings. The Manager Mark's response to me is that "I should have known that their salesperson gave me the wrong joints", even though I specifically told him I was running a water line and questioned them when I picked them up and was told that they would work. Bottom line....they don't stand up to their mistakes, and now I am out double what I paid for the material to have someone fix it.