10% distilled white vinegar solution (or 9 cups boiling water mixed with 1 cup distilled white vinegar) will loosen the most flux from a radiator. The best method would be to fill the radiator with said solution and cap it, then while wearing gloves so you don't burn your hands, give it a good shake for a minute, then let it sit for another 3 or 4 minutes and drain. Flush with hot tap and then final rinse with distilled. The water will be bluish (vinegar reacts with copper) and full of sand like flux. I did it...I was surprised actually.
post #11 of 17
3/31/11 at 5:27pm