Customer has a Small Slant Fin cast iron boiler attached to an old gravity radiator system with large pipe diameters, two pipe reverse return. Boiler is twenty years old and started percolating. In my experience this only happens when a system has a leak and feeding make up water. No leaks here. What cleaning solution to use to mitigate the deposits? I'm thinking of flushing like a tankless water heater with something a bit stronger than vinegar. Thoughts? Percolation sound telgraphs through the piping and is loud at first floor radiators. Boiler temp is below 180.
↧