Brass 2 way manifold for underfloor heating

Product detailed description

Underfloor heating systems require precise flow control and distribution to ensure even heat output across the floor surface. In residential and commercial buildings, these systems are commonly installed in new constructions and renovations where space efficiency and thermal comfort are priorities. Installers working with such systems must ensure accurate manifold selection and installation to maintain system balance and efficiency. This brass 2-way manifold is specifically designed for use in hydronic underfloor heating and cooling systems, offering two circuits with integrated flow measurement and regulation.

The manifold is constructed from pressed brass and features an electroplated finish for corrosion resistance. It includes two shut-off valves and flow meters with locking capabilities, allowing for individual circuit control and monitoring. The unit is designed for integration into systems using PEX-AL-PEX 16 x 2 piping and is compatible with standard Euroconus fittings. It is suitable for use with water-based heating and cooling fluids, including those with standard antifreeze additives.

Technical parameters

Installation and connection

Installation of the manifold involves securing the unit to a mounting bracket and connecting the inlet and outlet with 1 inch threaded fittings according to DIN ISO EN 228-1 standards. The inlet and outlet connections use Euroconus fittings, which require proper tightening to prevent leaks. Each circuit is connected using compression fittings compatible with ALPEX 16 x 2 piping. It is essential to ensure that the manifold is level and that all connections are tightened to the manufacturer's specifications. Common installation mistakes include incorrect tightening of fittings, which can lead to leaks, and improper alignment, which can affect flow distribution. The unit also includes an automatic air vent (1/2 inch) and a rotating drain valve (1/2 inch) for system maintenance and commissioning.

Compatibility and accessories

This manifold is compatible with PEX-AL-PEX 16 x 2 piping and Euroconus compression fittings. It is recommended to use the specified mounting brackets and sealing washers (WS 3825) to ensure a secure and leak-free installation. The manifold is designed for use with standard underfloor heating system components, including thermostats, circulators, and expansion vessels. Additional accessories such as control panels and insulation materials may be required depending on the system design and local regulations.

Technical background for designers

The manifold operates by distributing heated or cooled fluid through two separate circuits, each equipped with a flow meter and shut-off valve. The brass construction provides durability and resistance to corrosion, making it suitable for long-term use in hydronic systems. The EPDM sealing material ensures a reliable seal at all connections, while the electroplated brass finish provides additional protection against oxidation. The unit is designed to integrate into systems with standard pressure and temperature ranges, and the flow meters allow for precise control of each circuit. The sound insulation properties of the manifold meet DIN 4109 standards, reducing noise transmission through the building structure.

Service and operation

Regular inspection of the manifold is recommended to ensure all connections remain tight and that the flow meters are functioning correctly. The automatic air vent should be checked for blockages and the drain valve used periodically to remove any accumulated debris. The sealing washers should be inspected for signs of wear or degradation and replaced if necessary. The unit does not require scheduled service intervals, but any issues with flow or pressure should be investigated promptly to prevent system inefficiencies.

Frequently asked questions

Can this manifold be used with non-standard antifreeze mixtures?
It is suitable for use with water-based heating and cooling fluids, including those with standard antifreeze additives. Non-standard mixtures should be checked for compatibility with brass and EPDM sealing materials.

What is the maximum operating pressure of the manifold?
The maximum operating pressure is 6 bar, which is suitable for typical underfloor heating and cooling systems.

Can the flow meters be locked in place?
Yes, the flow meters are dual-regulating and include a locking mechanism to prevent unauthorized adjustments.

What type of sealing material is used?
The manifold uses EPDM sealing material, which is compatible with water-based fluids and provides a reliable seal at all connections.

Documents for download

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