I’d like to (must) make sure my plate chiller is clean. Too many “flavor crystals” are still coming out after long recircs with hot Oxyclean (forward and back-washing). I’d like to try sodium hydroxide (lye/caustic soda).
I have a March 809HS-PL pump. Silicone and thermoplastic hoses with SS camlocks. The only soft metal in the circuit is the copper brazing in the heat exchanger.
Q1: Will I trash any of my equipment recirculating hot caustic soda through?
Q2: What percent solution will give me adequate cleaning with the least corrosive effects?
And yes, I will be super safety-man and use all appropriate ppe (gloves, goggles, splash shield, boots, old clothes, etc.)