Most hot water heating systems, indoor or outdoor fired have a via leakes etc. This is done through a pressure reducing valve set at 15 psi.The system is protected by a relief valve set to open at 30 psi. The pressure will increase as the water is heated. Most systems use a glycol water mix to prevent freezing if theres a failure. The system needs to be isolated from your home water supply by a double check valve to prevent the glycol from getting into you household water if there is a pressure drop in the house.
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Today's Featured Article - Tractor Proflie: John Deere Model R - by Staff. The John Deere Model R, the last of the lettered tractors, was the first diesel-powered tractor produced by John Deere with a gasoline starting engine. It was also the first tractor they produced that had an optional steel cab. The photo above shows the tractor w
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