- Viega PEX Press fittings make consistent, reliable PEX tubing connections. Suitable for use with all ViegaPEX tubing products, Viega PEX Press fittings can be installed with the same hand and power tools as other Viega press systems. Three viewing holes allow the installer to confirm that tubing has been inserted properly and the color-coded tool locator ring consistently positions the tool on the press sleeve. Available in polymer, bronze and Zero Lead bronze, Viega PEX Press fittings come with factory-attached stainless steel sleeves and are tested and listed for use in potable water applications, radiant systems and residential fire protection installations.