Viega’s FostaPEX tubing provides a unique option for PEX installations. Its aluminum layer serves as an oxygen barrier, making FostaPEX compatible with closed-loop heating systems. The aluminum also keeps the tubing more rigid and reduces linear expansion. Unlike other PEX-AL-PEX, FostaPEX has the same dimensions as standard PEX tubing. Only PEX Press fittings can be used to make connections with FostaPEX tubing. FostaPEX is lead-free and NSF-approved for use with potable water. Viega MANABLOC manifolds have PEX Press fitting options. Make sure to use an appropriate prep tool to prepare FostaPEX tubing prior to making any connections.