i forgot to mention, if you ever do end up doing the venturi mod by adding the 1/4"x1/4" adaptor to the thread, make sure you dont glue it with some glue thatll give you a hard time taking it out if you ever need to service the impeller. i used crazy glue but i think Luke talked about drilling the hole just enough where you can stick the hose in there where its snug-- the hose will have the slit like the adaptor in the picture i showed