Is there a valve that will attach directly to the tank? I have a Hayward valve (spo75) but the distance between the inlet and outleton the tank is too large for this valve and the fittings are too small as well. I just have 1 return, 1 skimmer and 1 drain and 1 pipe to waste. I was looking at just a backwash valve with 3 ports, would this work? Any help appreciated.