Anyone ever heard about using a corrosion inhibitor in radiant installations that use non-oxygen barrier pex and cast iron components? A friend was advised to use Chemsearch 777 (http://www.chemsearch.com), which is advertised there as "Chemsearch® 777 provides corrosion protection in the piping of large closed loops. Prevents exchangers and zone valves from plugging due to corrosion. Reduces corrosion damage to water pump impellers and seals. Chemsearch® 777 is a non-chromate inhibitor, specially formulated for corrosion protection in copper, steel, and multi-metal systems, whether they are airtight or not. Also has a color indicator that becomes colorless if system pH gets too low and a borate buffer to maintain the pH of the recirculating water in the range of 8.5 - 10.5."
If this could work, folks could save a lot of money by not using oxygen barrier pex. Thoughts?
If this could work, folks could save a lot of money by not using oxygen barrier pex. Thoughts?