Stainless steel 4-way distributor with thermostatic valves, flowmeters, automatic air vents, drain valves, 3/4" nipples — FERRO SN-RZPU04S

FERRO SN-RZPU04S is a stainless steel 4-way hydraulic distributor intended for use in heating and cooling hydronic systems. The unit integrates thermostatic control valves for individual circuit regulation, clear flowmeters for quick balancing, automatic air vents to remove trapped air and drain valves for straightforward maintenance. Supplied with 3/4" nipples for connection, the manifold is built to offer corrosion resistance and reliable hydraulic distribution across multiple loops.

Advantages

The stainless steel construction ensures durability and resistance to corrosion in typical hydronic environments. Integrated thermostatic valves allow precise flow regulation of each circuit, while the visible flowmeters facilitate accurate balancing without the need for separate measuring tools. Automatic air vents reduce the need for manual bleeding, improving system efficiency and reducing noise. Drain valves simplify servicing and system flushing. Compact design with 3/4" nipples streamlines installation and connection to standard piping.

Suitable for

• Residential and light commercial underfloor heating zones
• Radiator or fan-coil circuits requiring individual flow control
• Low-temperature heating and chilled water distribution
• Multi-loop systems where easy balancing and maintenance are needed

Key specifications

• Material: stainless steel collector body
• Number of outlets: 4 independent circuits
• Valves: thermostatic control valves on each circuit
• Balancing: integrated transparent flowmeters for visual flow indication and adjustment
• Air handling: automatic air vents integrated on the supply/return group
• Maintenance: drain valves included for each loop or group flushing
• Connection: 3/4" nipples for system piping

How to use

Install the stainless steel distributor in a dry accessible manifold cabinet or service area, mounting it according to system layout and flow direction markings. Connect supply and return lines to the designated ports using the supplied 3/4" nipples and appropriate fittings. Use the thermostatic control valves to set the desired flow for each circuit and observe the integrated flowmeters while adjusting to achieve correct balancing. Open the automatic air vents during initial filling and after maintenance to remove trapped air, and use drain valves when flushing or isolating circuits for service.

Usage recommendations

Perform system filling and initial balancing with clean, treated water to reduce corrosion and deposits. Check flowmeter readings periodically and verify that automatic air vents operate freely; during long shutdowns, drain and protect exposed piping. For installation, follow local plumbing codes and use compatible fittings and sealing materials to ensure leak-free connections.