SPECIAL ORDER ITEM. Review Returns Policy before purchase. The ProPress by PEX Crimp adapter collection provides a reliable solution for transitioning between different piping systems. Designed for seamless integration, these adapters facilitate the connection between Viega PureFlow Crimp and ProPress systems, ensuring a secure and efficient plumbing infrastructure. Each component is engineered with an EPDM sealing element to maintain a tight, leak-resistant seal in demanding environments. These adapters are built to support professional-grade installations, requiring specific tools such as the PureFlow Crimp and ProPress jaws to achieve optimal performance.