Re: PH for all tanks
Sorry, I wasn't very clear. The heated SP cleaner seems to remove the petroleum oil ok. Every once in a while we change out the main cleaner/degreasing tank, and use the older used cleaner for the pre-cleaner tank. If something were to have a lot of oil on it, we have used solvents like paint thinner or Stoddard solvent to remove the bulk of the oil to make the heated cleaner solutions last longer.
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