Square stainless steel manifold – 6 circuits, flow meters, thermostatic valves, automatic air vents, 1" connection

Product detailed description

This stainless steel floor heating distributor is commonly used in residential and commercial buildings where balanced thermal distribution across multiple zones is required. Installers typically integrate these units into underfloor heating and hydronic cooling systems, ensuring each circuit can be individually regulated. The design allows for precise flow control and zoning, which is essential in systems with variable load requirements.

Typical applications include radiant floor heating in larger homes, office spaces, and hotels. The device supports both heating and cooling functions, making it suitable for year-round operation in mixed-use environments. The inclusion of automatic air vents helps maintain consistent performance by removing trapped air, while the flow meters enable accurate monitoring and balancing of the system.

Technical parameters

The maximum allowable working pressure of up to 6 bar and a service temperature range from -10°C to 120°C make this distributor suitable for a wide range of heating and cooling fluids, including water and standard glycol mixtures. The recommended pipe size ensures compatibility with flexible piping solutions, while the 1-inch inlet and outlet connections facilitate integration with standard manifold systems.

Installation and connection

Installation begins with positioning the distributor on a wall using the provided wall brackets, ensuring it is aligned within a dedicated enclosure. The distributor’s body connects via 1-inch threaded ports (G 1”), while the individual circuits use 3/4” Euroconus (Ek) connections. To attach the piping, crimp fittings specifically designed for ALPEX 16 x 2 are required.

Installers should verify the correct orientation of flow meters and thermostatic valves before securing all connections. A critical step involves checking the tightness of all threaded joints and ensuring that no torque is applied during tightening that could damage the internal components. Common mistakes include incorrect crimping of the Euroconus fittings, which may lead to leaks or poor sealing over time. Additionally, the thermostatic valves should be installed with their heads accessible for future adjustments or replacements.

Compatibility and accessories

This distributor is designed for use with PEX-AL-PEX 16 x 2 pipes, which must be connected using ALU-EK compression fittings. The recommended enclosure should provide sufficient space for access and maintenance. Additional components such as wall enclosures for distributors and flat seals (WS 3825) are necessary for proper installation.

Thermostatic valves are supplied with manual controls and can accept electrothermal heads for automated operation. Each circuit includes an automatic air vent and a rotating drain valve for easy maintenance. Installers should ensure that all required accessories are included in the order to avoid delays or incomplete installation.

Technical background for designers

The distributor operates as a central manifold that divides and regulates the flow of heated or cooled fluid to multiple circuits. Constructed primarily from stainless steel and brass, it offers high resistance to corrosion and mechanical stress. The use of EPDM gaskets and heat-resistant plastics enhances durability and ensures long-term sealing integrity.

Designers should consider the thermal expansion characteristics of the materials when planning the layout, particularly in systems involving large temperature variations. The dual-regulation flow meters allow for flow adjustment and locking, supporting precise system balancing. The overall system efficiency depends on correct sizing of the distributor relative to the total circuit demand and the ability to maintain stable pressure levels across all branches.

Service and operation

Periodic inspection of the automatic air vents and flow meters is recommended to ensure continued accurate function. The EPDM seals should remain intact to prevent leakage. No specific service intervals are stated, but visual checks for signs of wear, corrosion or leakage should be performed during routine system maintenance.

Key checkpoints include verifying the tightness of all threaded and compression joints, inspecting the condition of the EPDM gaskets, and confirming the correct operation of the thermostatic valves. In the event of unusual noise or reduced flow, the system should be checked for blockages or trapped air in the circuits.

Frequently asked questions

Can this distributor be used in both heating and cooling applications?
Yes, the distributor is suitable for both heating and cooling systems due to its operating temperature range and the types of fluids it supports.

What type of pipe is recommended for connecting the distributor?
PEX-AL-PEX 16 x 2 pipe is recommended for connecting the distributor to the system. This pipe type provides flexibility and thermal stability.

Is it possible to add electrothermal heads to the thermostatic valves?
Yes, the thermostatic valves support the fitting of electrothermal heads, allowing for remote or automated temperature control.

Are all necessary valves included with the distributor?
Yes, the distributor includes automatic air vents, rotating drain valves, and the appropriate number of flow meters and thermostatic valves for six circuits.

Documents for download

• Hygienically certified PZH - distributors, distributor beams and accessories (PDF)