I diy'd this pump for a skimmer project but have since gone to eheims. This pump started out as the non-needlewheel version. I bored out the inlet of the volute cuz I'm lazy and wanted to use a sedra venturi that I already had. Popped in a needlewheel impellar and used it on my skimmer for about 6mo. Free to anyone who could use it along with the venturi if I can find it. Pump was used when I got it so I am uncertain of age.