1 inch PEX Manabloc Supply End Cap

1 Inch PEX Manabloc Supply End Cap – Polymer Construction for Manifold Termination

The 1 inch PEX Manabloc Supply End Cap is designed for terminating unused ports on Viega PEX Manabloc distribution manifolds. This fitting provides a secure, leak-resistant seal for system balancing, testing, or future expansion. It is constructed of high-performance polymer and is compatible with Manabloc supply ports using proprietary compression or slip-fit connections, depending on the manifold model.

Material and Compliance Information

Manufactured from lead-free polymer materials suitable for use in potable water systems, this component conforms to NSF/ANSI 61 and NSF 372 standards. It is rated for typical operating pressures and temperatures found in domestic water supply systems using PEX distribution manifolds.

• ✅ Material: High-impact engineered polymer (typically polysulfone or equivalent)
• ✅ Connection Type: Compression-style slip-on for Manabloc supply port termination
• ✅ Size: 1 inch nominal (specific to Manabloc manifold connection)
• ✅ Certifications: NSF/ANSI 61 & 372; compliant with ASTM F877 (system dependent)

Installation Considerations

This end cap is intended for use with Viega Manabloc systems and should be installed according to manufacturer guidelines. No additional solvent cement or heat fusion is required. Ensure the cap is seated fully and tightened using appropriate torque or hand-tight specification to prevent leakage. This cap is not intended for use on general PEX tubing connections or non-Manabloc manifolds.

Applications

Used to cap off unused supply ports in a central Manabloc manifold within PEX plumbing systems. Suitable for residential and light commercial installations, it allows for circuit isolation during testing, seasonal shutoff, or staged installations where future branches are planned. It may also serve as a permanent termination point in overspecified manifolds.

System Note

PEX manifold systems such as Manabloc improve hydraulic balancing, reduce connection points, and enhance system serviceability. Using proper termination fittings is critical to maintain system integrity and code compliance. All components should be pressure-tested after installation according to local plumbing code requirements.