Securely connect polybutylene (PB) distribution lines to your PureFlow ManaBloc manifold with this polymer port adapter when replacing a previous generation Manabloc manifold system with divider plate and different port spacing. Get centralized zone control and fast hot water delivery with the innovative Pureflow ManaBloc manifold system. Polysulfone component includes integrated 1/4 turn shutoff valves and T-handle valve key. With the reliability and quality required for potable water, Viega PureFlow manifolds are part of Viegas complete innovative plumbing solution. PureFlow Manabloc manifolds allow for uncluttered installation with fewer potential leak points, easier maintenance and faster hot water delivery. Color: Black.