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A 4‑port closed press manifold features a ¾″ PEX press inlet and four ½″ PEX press outlets. Common in brands like Viega, it’s designed to distribute water efficiently to multiple fixtures (e.g., bathrooms, sinks) while allowing isolation of individual lines.
Inlet Size: ¾″ PEX press
Outlet Ports: Four ½″ PEX press (closed—each with built-in shutoff)
Type: Closed-end (ports sealed off individually)
Material: Poly-alloy (PPSU/plastic)
Max Pressure/Temperature: Up to ~200 psi and 200 °F
Fitting Method: ASTM F1960 expansion press compatible (also works with F1807/F2159 crimp/clamp if manufacturer allows)
Certifications: cUPC, NSF/ANSI potable water standards typically met
Individual Shutoff Valves: Closed ports let you isolate each branch, enabling easy maintenance without shutting off all water.
Compact & Integrated Design: Combines manifold and shutoffs into a single unit, reducing fittings and potential leak points.
Durable Plastic Construction: PPSU poly-alloy resists corrosion and chlorinated water, lightweight yet reliable.
Press-Fitting Efficiency: Compatible with expansion press tools for fast, secure, and visually verifiable installation.
Tool Requirement: Requires expansion or press tool—manual labor fitting not an option.
Limited Port Count: Only four outlets—larger systems need multiple manifolds or higher-port models.
Plastic vs Metal: While cost-effective, plastic manifolds may crack under extreme stress compared to copper/down manifold bodies.
The 4‑port closed PEX press manifold (¾″ × ½″) offers a clean, efficient solution for plumbing small zones—each branch can be isolated with no compromise on flow or reliability. Poly-alloy construction and press-fit technology bring durability and installation speed, though you'll need the right tools and might require more units for larger systems.
