Hi everybody. I'm currently preparing to purchase a Hayward DE filter (DE3620) and a 6 position backwash valve. The problem I'm having is in locating the correct valve. About 1/2 the valves I see on the internet have the inlet/outlet ports on the left hand side while the other 1/2 have the ports on the right hand side. Hayward's site does not differentiate between these two valves, and, nowhere have I seen valves listed with right or left hand ports. How do I know which valve I'm getting? The instruction manual on Hayward's web site does show "optional" bottom and top port arrangements but nothing on side port arrangements. How do I order the correct valve? I'm needing inlet/outlet ports on the right side of the valve.