I recently replaced the pump on my glycol chiller. The new pump has a cast iron housing. I read the article about glycol in the refrig section. It suggests using a rust inhibitor in the glycol loop when there is cast iron in the loop, but doesn't give any suggestions of what to use. I called a local chemical company and they weren't sure what I should use. Does anyone know what I should be looking for?
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rust inhibitor in glycol?
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