This is NOT FOR STEAM BOILERS.
I purchased this hoping the description on the actual bottle was correct, which it is. Its for HOT WATER BOILERS. NOT, I repeat, NOT for steam boilers as they put in the description. I do heating and cooling for a living and have for 38 years. I have seen people put this in steam boilers and it causes all kinds of problems of which the steam boiler has to be drained and flushed numerous times with white vinegar. The manufacturer of this product does make a product for steam boilers but this one is for hot water boilers only and not steam.
Rating: 5 stars