The ProTech 300 Boiler Water Treatment by Alternative Heating & Supplies Has been designed to be used in Manufacturers boiler treatment programs. These programs insist the wood boiler owners meet certain nitrite levels in order to comply with warranty requirements in regards to boiler corrosion protection. Adding 1 gallon of ProTech 300 to 300 gallons of boiler fill water will yield +/- 1000 ppm nitrite. The manufacturers can’t tell the difference if you're using their expensive brand or our ProTech 300, so send it into their labs to be tested without worry. This product works on all Outdoor Wood Boilers and Furnaces. Commonly used on Central Boiler, Aquatherm, WoodMaster, Cozeburn, Empyre, Freedom, Hardy, Hawken, Heatmaster, Heatmor, Natures Comfort, Ozark, Polar, Sequoyah, Shaver, Taylor, Wood Doctor, Mahoning, Aspen and MORE. The ProTech 300 Boiler Water Treatment is also used in Steam Boilers, Hot water systems and closed loop as well as pressurized systems as well. Indoor, outdoor and outside boilers and furnaces are fine as well. Wood Gasification units, Pellet boilers, Coal boilers and Furnaces and so much more. Alternative Heating & Supplies recommends changing yearly to ensure the highest anti-corrision protection. Our ProTech 300 Boiler Water Treatment works with Mild or Stainless Steel and helps prevent Rust and Scale corrosion. The Chemicals used are Nitrite based and are safe for the environment. ProTech 300 Test Kit - Test Nitrite levels easily and accurately just like the lab! This test kit is designed to provide an easy and accurate means to determine the level or amount of Nitrite in your system. Testing Nitrite on your own, ensures you are meeting manufacturer requirements. Proper chemical level within your system is essential to product performance and system protection. Test your water before you send it to the manufactures lab to ensure you get the full warranty on your unit.