Manifold with Shut-off Valves CALEFFI O3/4X4 O23P.1,5-18 (MPN 354054)

CALEFFI manifold with shut-off valves O3/4X4 O23P.1,5-18 is a hydraulic distribution unit intended to divide and isolate circuits in heating and plumbing installations. The unit integrates individual shut-off valves for each circuit, permitting flow regulation and isolated maintenance without disturbing other branches. Designed for residential and light commercial systems, this manifold supports a modular approach to circuit management and simplifies commissioning and servicing tasks.

Advantages

The manifold provides compact and organized hydraulic distribution with built-in shut-off valves that allow each circuit to be closed independently. Its design reduces installation time by centralizing connections and simplifies maintenance by enabling draining and isolation of single circuits. The unit is compatible with common piping sizes used in domestic and small commercial heating systems and improves system manageability through clear access to each circuit’s control point.

Suitable for

• Residential heating distribution (radiators, underfloor heating manifolds)
• Light commercial hydraulic circuits requiring modular control
• Installations where individual circuit isolation is needed for maintenance
• Retrofit projects that benefit from a compact, centralized manifold

When it may not be suitable

This manifold is intended for domestic and light commercial use; it may not be appropriate for large industrial systems with high flow and pressure demands or where specific industrial certifications or special materials are required. If the project requires integrated metering, balancing with electronic controls, or custom manifold layouts beyond the available port count, this standard shut-off manifold may not meet those needs.

Key specifications

• Function: hydraulic distribution manifold with individual shut-off valves
• Connection size: designed for three-quarter inch supply connections and multiple branch outlets sized for common domestic piping
• Port count: multiple circuit outlets (configured for four circuits in this model)
• Material characteristics: corrosion-resistant components suitable for heating and potable hot-water circuits
• Operation: manual shut-off valves for each circuit enabling isolation and flow interruption

How to use

Install the manifold in the hydraulic distribution location following local regulations and good installation practice. Connect the supply and return lines to the designated inlet and outlet connections, then attach each circuit to an individual branch outlet. Use the manual shut-off valve on each branch to regulate flow or isolate that circuit for maintenance. During commissioning, verify tightness of all joints and purge air from the system. Ensure accessible mounting and labeling of circuit outlets to facilitate future service operations.

What to consider before purchase

• Confirm compatibility with the piping diameters and thread types used in your installation
• Check the number of circuits required and select a manifold with a matching port count
• Verify material compatibility with system fluids and local regulations for potable or heating water
• Assess available space for mounting and access to shut-off valves for service

Usage recommendations

For reliable operation, mount the manifold in an accessible location, label each circuit clearly, perform pressure and leak tests after installation, and carry out periodic inspections of valve function. When isolating a circuit, bleed residual pressure before disconnection and follow standard safety procedures for heating and plumbing systems.