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.