Takes less than an hour to shift output to horizontal, basket removes with a big C clip, unscrew both end caps, remove four long black bolts. Pry to separate plastic shield so the vent hole is now on the bottom. Reassemble. I needed a short piece of 1 1/2" pvc and a no hub connector to mate the pump to the pentair filter. It comes with the fitting needed . I used some compound on the O ring . It runs very quiet.