Manifold - with outlets EK - 5/4 "xEK; 12-way; nickel IVAR.CS 501 NK

Product detailed description

Manifolds play a critical role in hydronic heating systems by distributing and collecting heat transfer fluid from multiple circuit loops. This 12-way unit is commonly used in underfloor heating applications in residential, commercial, and industrial buildings. Installers working on radiant heating projects require precise flow distribution and balanced return temperatures. The nickel plating offers enhanced corrosion resistance, making it suitable for long-term operation in closed-loop systems with glycol-based or water-based fluids.

During installation, the manifold is positioned centrally within the distribution room or technical space. The side connections accommodate supply and return lines from the boiler or heat pump. Each outlet connects to individual loop pipes embedded in floors, walls, or ceilings. The design ensures even flow distribution across all 12 circuits, which helps maintain consistent room temperatures and reduces energy consumption.

Technical parameters

Material	nickel-plated brass CW617N
Operating temperature	+120 °C
Nominal pressure	PN 10
Code	400502N
Brand	IVAR

These specifications guide the correct selection for system compatibility. The maximum operating temperature of +120°C makes it suitable for high-temperature radiant systems. The PN 10 rating indicates its ability to handle pressures up to 10 bar, ensuring safe operation under normal hydraulic conditions. These ratings should be considered when matching the manifold to the pump capacity, pipe sizing, and insulation requirements.

Installation and connection

To install the manifold, align the side ports with the supply and return piping using 1 inch and 5/4 inch female threaded fittings. The top port accepts a 1/2 inch female thread for control or expansion devices. Outlets are spaced 50 mm apart, allowing for precise alignment with manifold clamps or mounting brackets. Before tightening connections, ensure all components are clean and free of debris to prevent leaks. Common installation errors include misalignment of the manifold body, incorrect orientation of threaded fittings, and failure to secure all mounting points, which can lead to vibration or stress on the connections.

Compatibility and accessories

This manifold is compatible with standard 3/4 inch EK fittings for loop connections. It integrates with balancing valves, temperature sensors, and flow meters to enable fine-tuned system control. For complete system functionality, additional components such as insulation, mounting kits, and flow distributors may be required. Refer to the IVAR product range for complementary parts suitable for radiant heating applications.

Technical background for designers

The operating principle relies on uniform fluid distribution through parallel channels, each serving a specific heat emitter. The CW617N nickel-plated brass construction combines strength with resistance to chemical attack from common antifreeze solutions. Its thermal conductivity supports efficient heat transfer while maintaining structural integrity over time. The design allows for modular expansion, enabling future system upgrades. Long-term performance depends on proper sizing of the hydraulic circuits, regular maintenance of internal passages, and protection against freezing in unheated spaces.

Service and operation

Routine inspection should focus on checking for signs of corrosion, leakage at threaded joints, and blockage in the inlet/outlet ports. The nickel plating typically requires no active maintenance beyond cleaning if soiled. During system shutdowns, ensure the manifold remains dry to prevent condensation-related issues. While no scheduled service intervals are specified, visual checks during annual maintenance are recommended to confirm continued operational integrity.

Frequently asked questions

Can this manifold be used in a mixed radiant and panel heating system?
Yes, provided the total number of circuits does not exceed the 12 available outlets and the system pressure and temperature remain within the specified limits.

Is it possible to replace a single faulty outlet without replacing the entire manifold?
No, the outlets are integrated into the manifold body and cannot be individually removed or replaced.

What type of sealing material is recommended for threaded connections?
A non-hardening, teflon-based sealant is advised to ensure airtightness and ease of future disassembly.

How is the 50 mm spacing between outlets utilised during installation?
The fixed spacing allows for the use of standard manifold clamps and facilitates even distribution of connected loop pipes.