A Viega parallel system provides the lowest pressure and temperature fluctuations in a plumbing system. Since each tubing line is dedicated to an individual fixture, interference between fixtures is eliminated. Additionally, specific fixtures can be supplied by smaller diameter tubing depending on the actual amount of water needed. For this type of installation, Viega offers the revolutionary ManaBloc® parallel water distribution system, incorporating Viega PEX tubing and Viega PureFlow PEX Press or PEX Crimp fittings. The Viega ManaBloc® system provides a central location to control all plumbing lines and helps homeowners save energy costs and reduce water waste.