I want to hard plumb my AG pool. I searched some threads but still not sure what valves are best for reducing head loss. And I want to keep price down but be reliable. I have 1 1/2 skimmer, filter, and return threaded fittings, 2 inch heater is partly hard plumbed with ball vave bypass then reduced to 1 1/2 hose barbs. I looks like the ball valves are cheapest but are about 1/8 smaller DIA inside. The butterfly Jandy valves I read are best, but kinda pricey. I found this slice valve fairly reasonable priced, but not sure about head loss or how reliable they are.
Amazon.com : 1.5 Inch Swimming Pool Slice Valve : Swimming Pool Water Pumps : Patio, Lawn Garden
what do you guys think? Oh, I'm going to get schedule 80 unions also. Thanks