Viega PureFlow PEX Crimp fittings are a reliable and economical solution for connecting PEX piping and Viega offers a choice between metallic and plastic fittings. Compatible with other innovative Viega systems like the Viega MANABLOC parallel water distribution system and all three ViegaPEX tubing options, Viega PureFlow PEX Crimp fittings are an affordable choice for a quality plumbing system.