Contents
The Legom Manifold Range
Legom manufactures its manifolds in-house at its facility in Jiaxing, Zhejiang Province, with CNC machining, branch valve assembly, surface treatment, and pressure and leak testing on every unit. The range is organized into three series so you can match the material to your project: HPb 59-1 brass, nickel-plated brass, and 304 stainless steel. All three share the same core specifications and standard connections, differing mainly in material and flow capacity.
Manifold Specifications
The table below summarizes the core specifications shared across the Legom manifold range.
| Specification | Legom Manifold Range |
|---|---|
| Material series | HPb 59-1 brass, nickel-plated brass, 304 stainless steel |
| Branch configurations | 2 to 9 branches (brass); multiple outlet options across the range |
| Maximum working pressure | 16 bar |
| Maximum working temperature | 110°C |
| Main connection | 1″ female |
| Branch outlets | 3/4″ male Eurocone for 20×2.0mm and 16×2.0mm pipe |
| Branch spacing | 50mm |
| Main flow coefficient | 12 Kv (brass); up to 20 Kv (stainless steel) |
| Zone control | Branch valves accept Legom thermal actuators |
| Certification | CE, WRAS |
Brass Series
The brass series is machined from HPb 59-1 lead brass and finished with fine polishing and baking paint. It is the cost-effective, proven choice for standard residential underfloor heating, available in 2 to 9 branch configurations with body lengths from 110mm to 460mm. The main pipe carries a maximum flow coefficient of 12 Kv, and each branch 1.5 Kv, with branches spaced 50mm apart for actuator clearance.
Nickel-Plated Brass Series
The nickel-plated brass series offers the same brass body with an added nickel plating for extra corrosion resistance and a clean finish. It suits installations where appearance and long-term durability inside the manifold cabinet are priorities.
Stainless Steel Series
The 304 stainless steel series, with its higher 20 Kv main pipe flow and excellent corrosion resistance, suits light commercial heating distribution where durability and higher flow capacity are priorities.
How the Manifold Fits Into the System
Each Legom manifold distributes heated water from a single supply into individually controllable branch circuits. The 3/4″ Eurocone outlets connect directly to Legom floor heating pipe in 20×2.0mm and 16×2.0mm sizes, and the branch valves accept Legom thermal actuators for automatic per-zone temperature control from a room thermostat. This makes the manifold the central coordination point that connects a heat pump or condensing boiler to multiple low-temperature floor loops, distributing flow evenly across circuits from a single supply and return point.
“The most common mistake I see in manifold selection is people focusing on the body and forgetting the connections. A manifold is only useful if its outlets match your pipe and its branch valves accept your actuators. That is why we standardized the whole range on 3/4 inch Eurocone outlets and a common branch valve. My advice to any buyer is to confirm three things before ordering: your pipe outer diameter, the number of heating zones, and the actuator type you are using. Get those three right and the rest of the selection is straightforward.”
— Maggie Shen, Director of Legom
Choosing the Right Manifold
To select the correct Legom manifold, confirm three details from your system design: your floor heating pipe size (to match the Eurocone outlets), the number of heating zones you need (to choose the branch count), and the thermal actuator type your controller uses. With these three points, the Legom engineering team can recommend the right series and branch count, or begin a custom OEM project. For a broader explanation of how manifolds work within a heating system, see our guide on underfloor heating manifolds, or explore the full Legom manifold range.
Frequently Asked Questions
What pressure and temperature can Legom manifolds handle?
Legom manifolds are rated for a maximum working pressure of 16 bar and a maximum working temperature of 110°C, using water as the working medium. This covers standard underfloor heating and medium-temperature hydronic distribution in both residential and light commercial systems. These ratings apply across all three material series, brass, nickel-plated brass, and stainless steel, so you can choose the material based on your corrosion resistance and flow requirements without compromising on the pressure and temperature rating.
What pipe sizes do Legom manifolds connect to?
Legom manifolds use 3/4″ male Eurocone branch outlets that connect directly to 20×2.0mm and 16×2.0mm floor heating pipe, where the figures represent the pipe outer diameter and wall thickness. The main connection is 1″ female. This standard Eurocone connection makes the manifolds compatible with Legom floor heating pipe in those sizes, as well as other standard pipe using the same union. When ordering, confirm your pipe outer diameter so the correct Eurocone connections are supplied.
What is the difference between the brass and stainless steel manifold series?
Both perform well for underfloor heating. The brass series (HPb 59-1) is the proven, cost-effective choice for standard residential systems, covering 2 to 9 branches with a 12 Kv main flow coefficient. The nickel-plated brass series adds extra corrosion resistance and a clean finish. The 304 stainless steel series offers a higher 20 Kv main flow and excellent corrosion resistance, making it better suited to light commercial distribution where higher flow capacity and durability are priorities. The choice comes down to your flow requirements, environment, and budget.
Can I control each zone separately with a Legom manifold?
Yes. The branch valve heads on Legom manifolds accept Legom thermal actuators, which open and close each loop in response to a room thermostat or controller. This provides automatic, independent temperature control for each heating zone, allowing different rooms to be set to different temperatures. The 50mm branch spacing ensures each actuator can be installed and serviced without obstruction. Combined with a room thermostat per zone and a base station, this creates a complete multi-zone control system for room-by-room comfort.
Reviewed by Maggie Shen, Director at Legom, on July 20, 2026. This guide to Legom underfloor heating manifold specifications was checked for technical accuracy and relevance to installers and distributors.