Shad McGrath
January 04, 2019

I am wondering what size mixing valve I should order for my hydronic floor heat. I originally have ordered 1" TMV 521619a from houseneeds .com. I have one zone with 4 circuits of 250-300 feet of 1/2" pex in floor joists, and another zone with 2 circuits of 250 feet of 1/2" pex in concrete.Each will have its own pump and TMV. I was needing some sizing assistance if possible, since I believe I have oversized the TMVs. Any help you could give would be greatly appreciated, thank you. Shad McGrath

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