I received my new Hayward heater yesterday and had the gas hooked up today by our gas company. Now I am working on the plumbing and I've decided to install a heater bypass for those times the heater is leaking or my chemicals are not ideal for whatever reason. Desperate, I went to Leslie's and purchased a generic 3-way valve. I also have a Pentair check valve. I plan to install the plumbing following the schematic that is attached. I have several questions regarding the 3-way valve. First, can this valve be turned anyway I want to turn it. One port is labeled "input".....but does that matter? Looking at the schematic, it would appear that I should be able to set the valve where it can go straight through the valve (180 degrees) and cut off the 90 degree port. This does not seem possible. On my valve, there is an inlet port and by turning the handle, I can get 1) both of the two other ports open, 2) the left 90% port open, or the right 90% port. So, on my valve, if I want to follow the schematic I would have to make one of the other ports the "inlet" and I would have to have both the 180 degree and 90 degree ports open. My concern is that setup this way, water will go to both the heater and through the bypass. What am I missing? I had assumed that I could configure the valve to close off the 90% and just open the 180 degree port? Hope this makes sense!