3 X 4, Forged Steel, Integral Bolt, Integral Bolt, Obround, Curved 24-30D. Handhole Assembly less Ring BaseSKU-50672 Lowers the boiler temperature to

Lowers the boiler temperature to save fuel without sacrificing comfort Easy to Install - No outdoor sensor required Easy to Set - Just dial in the number of heating zones Works with virtually any boiler How It Works

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3 X 4, Forged Steel, Integral Bolt, Integral Bolt, Obround, Curved 24-30D. Handhole Assembly less Ring BaseSKU-50672 Lowers the boiler temperature to3 X 4, Forged Steel, Integral Bolt, Integral Bolt, Obround, Curved 24 30D. Handhole Assembly less Ring Assembly Includes: Handhole Plate, Poly Gasket, Yoke, stud bolt, Nut and Washer.