BOILER-AIDE from J.C. Whitlam protects systems from scale formation and mineral deposits and inhibits corrosion on all metal surfaces inside the boiler and pipes. The liquid treatment prevents oxygen pitting and formation of limescale, eliminates surging and foaming, and controls the pH of boiler water. It is free from petroleum distillates and is compatible with seals and gaskets. BOILER-AIDE is available in 1-quart and 1-gallon plastic jugs with spout, a 5-gallon pail with handle, and a 55-gallon open-head steel drum. 800-321-8358; www.boiler-aide.com.