Square stainless steel manifold – 4 circuits, flow meters, thermostatic valves, automatic air vents, 1" connection

Product detailed description

This stainless steel manifold is commonly used in radiant floor heating and cooling systems in residential and commercial buildings. It allows for individual control of each circuit, ensuring balanced heat distribution. Installers typically integrate it into underfloor heating layouts where precise regulation of water flow and temperature is required. The unit is suitable for both new installations and system upgrades.

Typical applications include underfloor heating in living areas, bathrooms, and commercial spaces such as offices and retail environments. The manifold ensures efficient operation by allowing each loop to be adjusted independently, which is particularly useful in large or irregularly shaped rooms. It is also compatible with cooling applications using water-based systems.

Technical parameters

Installation and connection

Mount the manifold using the included wall brackets inside a dedicated enclosure. Ensure the enclosure is accessible for future maintenance. Connect the inlet and outlet via 1-inch threaded fittings according to DIN ISO EN 228-1 standards. For branch circuits, use Euroconus (Ek) connections with ALPEX 16 x 2 mm pipe and appropriate crimping tools.

Check that all threads are clean and free of debris before tightening. Apply a suitable sealant if necessary, though the EPDM sealing rings already included provide sufficient sealing. Ensure that the flow meters and thermostatic valves are correctly oriented and that the lockable adjustment feature is engaged after setting the desired flow rate.

Avoid overtightening the Euroconus fittings, which can damage the pipe or fitting. Confirm that the automatic air vents are positioned at the highest point of each circuit to allow effective air release. Always perform a pressure test after installation to verify system integrity.

Compatibility and accessories

This manifold is compatible with PEX-AL-PEX 16 x 2 mm pipes and requires ALPEX crimped fittings for secure connections. Enclosures for manifolds should be selected based on the number of circuits and space requirements. Additional components such as electrical actuators (servo heads) can be added to the thermostatic valves for automated control.

Ensure that the enclosure is properly sized to accommodate the manifold’s length of 345 mm when installed with globe valves. The recommended enclosure should also allow for easy access to the valves and flow meters for regular monitoring and adjustments.

Technical background for designers

The manifold operates by distributing heated or cooled water through multiple circuits, each controlled by a thermostatic valve and monitored by a flow meter. The stainless steel construction (1.4301) offers high corrosion resistance, making it suitable for long-term use in humid or chemically treated environments.

The use of brass fittings (Ms 58, nickel-plated) ensures durability and compatibility with standard plumbing systems. The EPDM sealing rings provide a reliable seal across a wide temperature range, from -10°C to 120°C. The flat sealing (WS 3825) design minimises leakage risks and facilitates quick inspection and replacement.

Integrating this manifold into a system requires careful planning to ensure even load distribution and proper balancing. The flow meters allow for visual confirmation of flow rates, while the thermostatic valves enable manual or automatic temperature regulation. The design supports both heating and cooling modes, depending on the system configuration.

Service and operation

Periodic checks of the flow meters and thermostatic valves are recommended to ensure accurate readings and smooth operation. Clean the automatic air vents regularly to prevent blockage and maintain efficient air release. Inspect the Euroconus connections for signs of wear or leakage, especially after prolonged use or in high-pressure conditions.

If the system is used in a cooling application, monitor for condensation and ensure proper insulation around the manifold to prevent thermal bridging. Replace any damaged seals or valves immediately to avoid system inefficiencies or leaks. Always refer to the manufacturer’s technical documentation for specific service recommendations.

Frequently asked questions

Can this manifold be used in a cooling system?
Yes, it is compatible with water-based cooling systems provided the fluid temperature does not exceed +80°C during operation.

What type of pipe is recommended for connecting the manifold?
PEX-AL-PEX 16 x 2 mm pipe is recommended for optimal performance and compatibility with the Euroconus fittings.

Is it possible to add electric actuators to the thermostatic valves?
Yes, the thermostatic valves support the installation of electric actuators (servo heads) with a M30x1.5 thread for automated temperature control.

How should the manifold be mounted?
Mount the manifold using the included wall brackets inside a suitable enclosure to ensure accessibility and protection from physical damage.

Documents for download

• Hygienically certified - manifolds, manifold brackets and accessories (PDF)