Check the listing for details. Amtech 300 Outdoor Wood Boiler Water Treatment, Corrosion Inhibitor, 1 Gallon. Condition: New. Listed at 48.99 USD. The AmTech300 Offers 2 levels of protection- 2 Active Ingredients. AmTech 300 will protect your wood boiler from rust, corrosion, and scale. As well as balance pH and alkalinity. Our product has been designed to work just as well as any other name brand boiler treatments that come directly from other manufacturers without the Premium price tag. One gallon of AmTech300 will treat 300 gallons of boiler fill water and maintain 1000ppm nitrite level. However, like any other boiler treatment chemical, you must dose your treatment based on the needs of your system. You can determine the needs of your system by testing your boiler water using one of our AmTech 300 do it yourself Wood Boiler Water Test Kits. Check out 300TestKit. Remember, the manufacturer's can't tell if you used their expensive brand or AmTech 300 - why pay more?