M-B25 Brass Manifold
Legom M-B25 Brass Manifold is a precision-machined distribution manifold for underfloor heating and hydronic HVAC systems, manufactured from HPb 59-1 brass for high mechanical strength and reliable performance in pressurized water circuits. It distributes heated water from a single supply into 2 to 9 individually controllable branch circuits, with a fine-polished, baking-paint finished body built for long service life in residential and commercial installations.
With a maximum working pressure of 16 bar, a working temperature up to 110°C, and 3/4″ male Eurocone branch outlets compatible with 20×2.0mm and 16×2.0mm pipe, the M-B25 connects directly to Legom floor heating pipe and accepts Legom thermal actuators on the branch valves for automatic zone control. The main pipe carries a maximum flow coefficient of 12 Kv (m³/h) and each branch 1.5 Kv (m³/h), with branches spaced 50mm apart.
Key Benefits
- HPb 59-1 brass body: Machined from HPb 59-1 lead brass for high mechanical strength, excellent machinability, and dependable operation in pressurized hot water circuits
- 2 to 9 branch configurations: Available in eight sizes from 2 to 9 ports, covering small apartments through to large multi-zone floor heating layouts
- 16 bar working pressure: Rated to a maximum working pressure of 16 bar for secure operation in residential and commercial hydronic systems
- 110°C working temperature: Handles working temperatures up to 110°C, suitable for underfloor heating and medium-temperature hydronic distribution
- Eurocone branch outlets: The 3/4″ male Eurocone outlets connect to 20×2.0mm and 16×2.0mm pipe using standard compression unions, simplifying connection to floor heating loops
- Fine-polished, baking-paint finish: Surface treated with fine polishing and baking paint for corrosion resistance and a clean, durable appearance
- Thermal actuator ready: Branch valves accept Legom thermal actuators for automatic per-zone temperature control from a room thermostat or controller
- Balanced flow distribution: A main pipe flow coefficient of 12 Kv (m³/h) and 1.5 Kv (m³/h) per branch supports even water distribution across loops
- OEM and ODM customization available: Branch count, connection thread, and surface finish can be customized for distributor and system integrator requirements
Technical Specifications
| Product Parameter | Specification |
|---|---|
| Main Material | HPb 59-1 brass |
| Connection Spec. | F1″ * M3/4″ |
| Maximum Working Pressure | 16 bar |
| Working Temperature | 110°C |
| Working Medium | Water |
| Surface Treatment | Fine polishing and baking paint |
| Max. Flow Rate of Main Pipe | 12 Kv (m³/h) |
| Max. Flow Rate of Branch Pipe | 1.5 Kv (m³/h) |
| Branches | 2 to 9 |
| Eurocone | 20*2.0, 16*2.0 |
| Distance Between Branches | 50mm |
Dimensions
| Branches | No. of Branches | L (mm) |
|---|---|---|
| 2 ports | 2 | 110 |
| 3 ports | 3 | 160 |
| 4 ports | 4 | 210 |
| 5 ports | 5 | 260 |
| 6 ports | 6 | 310 |
| 7 ports | 7 | 360 |
| 8 ports | 8 | 410 |
| 9 ports | 9 | 460 |
Application & Use Cases
- Underfloor heating distribution: The primary application. The manifold splits supply and return water into individual floor heating loops, with each branch controlled separately for room-by-room temperature management
- Multi-zone residential heating: The 2 to 9 branch range suits everything from a single small apartment to a large multi-room house, with one branch per heating zone
- Commercial hydronic systems: The 16 bar pressure rating and brass construction support light commercial heating distribution where durability and higher pressures are required
- Heat pump and boiler systems: Connects the heat source to multiple low-temperature floor loops, distributing flow evenly across circuits served by a heat pump or condensing boiler
- Radiant wall and ceiling heating: Distributes water to radiant panel circuits where independent zone control and balanced flow are design requirements
- Renovation and retrofit projects: The compact branch spacing and Eurocone connections allow the manifold to be fitted into existing manifold cabinets during refurbishment
Installation Notes
- Mount the manifold horizontally on a wall bracket or inside a manifold cabinet positioned above the floor loops, leaving clearance for actuators and pipe connections
- Connect the supply and return lines to the 1″ female main connections on each end of the manifold body
- Connect each floor heating loop to the 3/4″ male Eurocone branch outlets using compression unions sized for 20×2.0mm or 16×2.0mm pipe
- Fit Legom thermal actuators to the branch valve heads for automatic zone control driven by a room thermostat or controller
- Flush the system thoroughly before commissioning to remove installation debris that could obstruct flow or damage valves
- Conduct a pressure test at a minimum of 1.5 times the intended working pressure before screed or concrete is poured, and confirm all connections are leak-free
- Balance the loops and label each branch at the manifold to simplify commissioning and future maintenance
- Maintain the 50mm branch spacing clearance so each thermal actuator can be installed and removed without obstruction
Frequently Asked Questions
What is HPb 59-1 brass and why is it used for the manifold body?
HPb 59-1 is a lead brass alloy known for excellent machinability and high mechanical strength, which makes it well suited to precision-machined manifold bodies that must hold pressure and accept threaded connections. It is widely used in plumbing and heating components carrying water. The body is fine-polished and finished with baking paint for corrosion resistance and a clean appearance.
What does the connection spec F1″ * M3/4″ mean?
The main supply and return connections at each end of the manifold are 1″ female (F1″), and the branch outlets that feed each floor loop are 3/4″ male (M3/4″). The 3/4″ branch outlets use the Eurocone standard, so they connect to floor heating pipe through standard 3/4″ compression unions.
How many branches are available and what are the lengths?
The M-B25 is available in eight branch configurations from 2 to 9 ports. The body length grows by 50mm per branch: 2 ports is 110mm long, 3 ports 160mm, 4 ports 210mm, 5 ports 260mm, 6 ports 310mm, 7 ports 360mm, 8 ports 410mm, and 9 ports 460mm. Select the branch count to match the number of heating zones in your project.
What is a Eurocone connection and which pipe sizes fit?
Eurocone is a common 3/4″ union standard used to connect floor heating pipe to a manifold branch outlet. The M-B25 supports Eurocone connections for 20×2.0mm and 16×2.0mm pipe, where the figures are the pipe outer diameter and wall thickness. This makes it compatible with standard Legom floor heating pipe in those sizes.
Can I fit thermal actuators to this manifold?
Yes. The branch valve heads accept Legom thermal actuators, which open and close each loop in response to a room thermostat or controller for automatic zone control. Maintain the 50mm branch spacing clearance so each actuator can be installed and serviced without obstruction.
What is the maximum working pressure and temperature?
The M-B25 is rated for a maximum working pressure of 16 bar and a working temperature up to 110°C, with water as the working medium. This covers standard underfloor heating and medium-temperature hydronic distribution in residential and light commercial systems.
Can the M-B25 manifold be customized for OEM or private-label supply?
Yes. Legom supports full OEM and ODM services for the M-B25 Brass Manifold, including customization of branch count, connection thread, and surface finish. All customization projects are handled under strict confidentiality. Contact our team to discuss your requirements.
OEM & ODM Customization
Legom is a direct manufacturer offering full OEM and ODM services for the M-B25 Brass Manifold. Our manufacturing team can customize branch count, connection threads, surface finish, and packaging to match your product and brand requirements. All customization projects are handled with strict confidentiality. Contact us via WhatsApp or info@legomsmart.com.
Product information last reviewed by the Legom Technical Team. For the most current specifications, refer to the official datasheet or contact our sales team.
Custom OEM & ODM Solutions
Legom is a direct manufacturer offering end-to-end OEM and ODM services. With our in-house engineering and production capabilities, we work closely with distributors and system integrators to deliver fully customized solutions under strict NDA.
