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I have a concrete pool and had to drain the pool to replace the brass hydrostatic valve that was 30 years old and leaking. The new valves made by Hayward(SP1056) are PVC and screw into a 1.5" fitting. I chipped out the old valve and I want to put in a female fitting into the main drain to...

Re: Solar Panel Layout Personally, i would use your original idea of all in series. If you live in Oregon the water will not get much above 90-100 degrees, if that. You can easily insulate the outside of the return pipe. The problem with any parallel approach is that water will take the least...