I have several March pumps laying around but I only use one at a time. I have often thought it would be cool to hard pipe everything so I could just open and close valves to send whatever liquid wherever I want. After 23 years of brewing it has become clear to me that with anything less than a 20 gallon batch it would not be that efficient to have everything hard piped. Too much waste. Not to mention cleaning. I make about 17 gallons per batch (into the fermenter, to get 15). You lose a 1/4 gallon here and, a 1/4 gallon there, it ain't worth it. I just use one pump with rubber hoses that I can hook up here and there. Figure out a quick connect setup rather than a bunch of pumps hooked up at once. There are all sorts of quick connect devices out there. Find something that you can universally implement into your system and use that.