SPECIAL ORDER ITEM. Review Returns Policy before purchase. This carbon steel press system is designed for use in chilled water, hydronic heating, compressed air and fire sprinkler applications. These fittings are for use in piping systems utilizing ASTM A53, A106, A135 and A795 schedule 5 to schedule 40 black steel pipe. They reduce installation time and eliminate messy cutting oils. This fitting works seamlessly with schedule 5 to 40 carbon steel pipes and provides durability for long-term use. It allows for secure connections and is suitable for both commercial and industrial applications.