Methods, processes, compositions and systems for preventing leaching effects from drinking water service pipes (such as lead, steel and copper) having an inner diameter of at least approximately 12 mm and the pipe coatings. 2-step thermoset resin coating is applied to pipe interiors and inner surfaces of fittings/valves, and exterior ends of the pipes that fit within the fittings/valves “in place” without dismantling the pipes from fittings where the curing agent can be phenol free and plasticizer free adduct. The coating can reduce heavy metals, such as lead, from leaching from installed pipes and fittings to less than approximately 10 μg/L (10 ppb). When cured, specific leachates, Bisphenol A and Epichlorohydrin from the coatings will be (less than)