How often should the glycol be change in long draw glycol systems? I have read every two years, MM says every 8 months to a year. Also, I know a refractometer is the most accurate way to check the glycol mix but they are in the $150 to $200 range -- Has anyone tried using an automotive anti freeze checker made for propylene glycol and compared the results since they are under $10?
Login or Sign Up
- Log in with