Back for an update on my Columbia system. On June 21, which is 1 month to the day that I ordered it, I came home to a pump running but no water flowing. First thing the next morning I call Columbia, explain problem, fella tells me I need a new impeller. I email him the info he needs, I call him back, he checks email and tells me that he will send me out a new impeller and that I should get it by mid week. I didn't agree with this process, I felt it should have been overnighted seeing as which I hadn't even gotten a full months use out of it. But I hooked up my paper cartridge filter to get me through the next few days. Yesterday was mid week and I have not gotten my part. I call Columbia again this morning and speak with a lady who informs me that my part was just mailed out YESTERDAY!! Needless to say my bp went thru the roof. All she could tell me was that the fella probably did take it to shipping on Friday but shipping has been backed up cause people want their parts this time of year. (You don't reckon!) I know things that are mechanical can have defects from the factory, stuff happens, but don't lie to me. I do not recommend buying anything from Columbia. I wish I would have spent the extra money and purchased a Hayward and I believe I wouldn't of had the aggrivation that I have had. Oh well, live and learn! (now that my bp is lower)