Marketing InformationViega MegaPress® FKM is a carbon steel, cold Press® system designed for use in chilled water, hydronic heating, compressed air and fire sprinkler applications. Viega MegaPress® FKM fittings are designed for use in piping systems utilizing ASTM A53, A106, A135 and A795 sch 10 to sch 40 carbon steel pipe. Viega MegaPress® FKM fittings in sizes from 1/2 to 4 in are offered in configurations including elbows, couplings, no-stop couplings, reducers, tees, reducing.