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10sqm Twin-wall Panel Underfloor Heating - PP Tacker System
Guide · Heating circuit distributor · Stainless steel · Hydraulic balancing · Installation
Underfloor Heating Manifold – Stainless Steel, Installation & Hydraulic Balancing 2026
2-12Circles
freely selectable
5Years
Seal warranty
6bar
max. operating pressure
Noble-steel
Corrosion-resistant & Durable
Stainless steel manifold delivered right to your door
5-year seal warranty · PZH certified
GEG Section 60 – Hydraulic balancing legally mandatory
Stainless steel instead of brass – no dezincification, no corrosion problem
Stainless Steel Manifold for Underfloor Heating
What is a heating circuit manifold – and why is stainless steel better?
The heating circuit manifold is the heart of every underfloor heating system: it distributes the warm heating water evenly to all heating circuits in the house and individually regulates the flow in each circuit. Each heating circuit supplies a defined area – typically 10–15 m² with a pipe spacing of 15 cm.
The decisive material difference: Stainless steel manifolds are corrosion-resistant to soft and hard water, do not dezincify like brass, are food-safe, and suitable for glycol concentrations up to 50%. With a 5-year seal warranty and PZH certification, they are the more reliable long-term choice – especially for heat pump systems with low flow temperatures (30–35 °C).
The manifold is equipped with thermoelectric actuators (M30 × 1.5, NC type), which are controlled by the room thermostats. This creates room-by-room individual room control according to GEG § 61.
2–12
Heating circuits
0–5 L/min
Flow Meter
max. 70 °C
Flow temperature
G 1″
Standard connection
6 bar
max. operating pressure
SGH
certified
Who is the stainless steel manifold for?
Your problem – our solution
Whether for new builds, renovations, or heat pumps – the stainless steel manifold with flow meter is the permanently reliable basis for any underfloor heating system.
Problem
Brass manifolds corrode in soft water due to dezincification – yellowish deposits, pressure loss, leaking fittings. Subsequent replacement costs time and money.
Lösung
Stainless steel manifold: Fully corrosion-proof, no dezincification, suitable for all water qualities. 5-year seal guarantee – even for glycol concentrations up to 50% in heat pump systems.
Problem
Without hydraulic balancing, one heating circuit heats too much, another too little. Result: cold rooms despite the heating running, increased power consumption of the circulation pump.
Lösung
Integrated flow meters (0–5 l/min) on each circuit enable precise hydraulic balancing. GEG § 60 and EN 14336 fulfilled – without complex calculations by a specialist.
Problem
Air in the heating circuit leads to gurgling noises, uneven heat distribution, and, in the worst case, to corrosion damage due to oxygen ingress.
Lösung
Automatic air vent on the manifold group removes trapped air independently. No more manual venting – especially important during initial start-up and after maintenance.
Pros & Cons
Advantages & Disadvantages of Stainless Steel Manifolds
Honest reviews – so you can make the right decision.
Benefits
- Stainless steel: completely corrosion-proof – no dezincification as with brass, suitable for all water qualities
- 5-year seal warranty, 2-year product warranty, PZH certified
- Integrated flow meter 0–5 l/min: hydraulic balancing possible without a specialist
- 2–12 zones: scalable from single-family homes to multi-family dwellings
- Glycol-tolerant up to 50% – ideal for heat pump systems with frost protection
- M30 × 1.5 actuator thread – compatible with all common Engo actuators
Disadvantages
- Higher purchase price than brass manifolds - but cheaper in the long run due to longevity
- Hydraulic balancing according to GEG § 60 is mandatory – requires brief training in flow calculation
- Distribution box (surface-mounted or flush-mounted) must be installed separately – plan for space requirements
Applications
What projects is the stainless steel manifold suitable for?
From heat pumps in new buildings to renovations in old buildings – the stainless steel manifold fits everywhere.
Heat pump
OptimalGlycol-tolerant up to 50%, max. 70 °C – ideal for heat pumps with 30–35 °C flow temperature
New construction
OptimalHydraulically balanced from the start – GEG § 60 & EN 14336 compliant
Stock renovation
OptimalReplacing brass manifolds: G 1″ connection is standard – fits existing pipework
Multi-family house
OptimalUp to 12 circuits per manifold – one manifold per residential unit, central or decentralized
Holiday apartment
GeeignetRobust stainless steel withstands long downtimes without corrosion damage
Soft water
OptimalStainless steel no dezincification problem – brass often fails after a few years here
Commercial / Office
GeeignetMax. 6 bar, max. 70 °C – sufficient for all commercial heating systems
Drywall / Thin-coat
GeeignetLow flow temperature 30–35 °C: Stainless steel manifold with flow meter for precise control
Optimal
Geeignet
Bedingt
Nicht geeignet
Prices & Costs
How much does a manifold for underfloor heating cost?
Stainless Steel Manifold with Flow Meter – Price Overview 2026.
€50 – €180
completely
Manifold with flow meter from €49.69 (with automatic air vent from €57.90) + ball valve set (~€24) + manifold box (~€42). Actuators E30NC-230 €9.50 each. Complete set configurable from €108.67.
Lower the price
- No specialist needed for installation – standard G 1″ screw connection, 3/4″ Eurocone compression fittings
- Hydraulic balancing can be performed by yourself with integrated flow meters
- Stainless steel: no maintenance, no corrosion protection, no spare parts – buy once, use forever
Increases the price
- Number of heating circuits: 2-circuit from ~50 €, 8-circuit from ~90 €, 12-circuit from ~130 €
- Automatic deaerator: ~€8 surcharge – recommended for initial commissioning and heat pumps
- Ball valve connection set (straight or angled): ~€24 – for a clean connection to the heating system
- Distribution box (surface-mounted or flush-mounted): ~€42–44 – protects distributors and cable routing
Prices are based on current MC Therm list prices (2026). Details in the guide.
Standards & Regulations
Standards & Legal Requirements
GEG Section 60
Building Energy Act 2024
Hydraulic balancing is mandatory by law when replacing heating systems and during substantial renovation. The adjustable flow meter on the manifold is the tool to fulfill this requirement.
EN 14336
Installation of heating systems
Regulates the installation, commissioning, and pressure testing of hot water heating systems. Manifolds must withstand a test pressure of 1.3 × operating pressure – for 6 bar operating pressure = 7.8 bar test pressure.
EN ISO 11855
Surface Heating & Cooling
Regulates the design, calculation, and operation of radiant heating systems. Heating circuit length max. 100–120 m, pipe spacing and flow rate according to heat load calculation.
PZH
Polish National Institute of Hygiene – Drinking Water Approval
PZH certification confirms material suitability for drinking water and heating systems. Stainless steel meets the requirements without restrictions – unlike brass containing lead.
GEG § 60 mandates hydraulic balancing for heating system replacement and renovation. The integrated flow meter (0–5 l/min) on the stainless steel manifold enables adjustment without complex software or expert planning. PZH certification, EN 14336 pressure test (6 bar), and a 5-year seal warranty ensure long-term operation.
Guides & Knowledge
All heating manifold guides
All guidesBuying Guide, Installation, Hydraulic Balancing & Costs – the complete guide.
Buying Guide · 9 min
Underfloor Heating Manifold Buying Guide: Stainless Steel, Number of Circuits & Air Vent
Why stainless steel is the better choice, how many circuits you need, and which extras are worthwhile.
Jetzt lesen → Instructions · 12 minInstalling a Heating Circuit Distributor: Step-by-Step Assembly Guide
Position, distribution box, pipe connections, ventilation, and pressure test – everything you need.
Jetzt lesen → GEG Requirement · 11 MinHydraulic balancing for underfloor heating: Correctly setting the flow meters
Calculate flow rate, set flowmeter, fulfill GEG § 60 – explained step by step.
Jetzt lesen → Cost Guide · 8 minHeating Circuit Manifold Costs 2026: Prices, Accessories & Complete Budget
Manifold from €49, cabinet from €42, actuators €9.50/piece – all costs transparently itemized.
Jetzt lesen →Does it fit?
The complete underfloor heating
Manifold, control, laying system, and heating pipe – everything perfectly matched at MC Therm.
Duty
Actuators & Thermostats
Engo E30NC-230 actuators (M30 × 1.5, NC, €9.50) and thermostats – compatible with any stainless steel manifold.
Recommended
Underfloor Heating Installation System
Tacker system, hook-and-loop system, thin-layer, or dry construction – the right laying system for the manifold.
Recommended
heating pipe
PE-RT heating pipe 16 × 2 mm – optimally matched to a supply temperature of 30–35 °C and manifold flow.
Frequently Asked Questions
FAQ Underfloor Heating Manifolds
Brass distributors can be damaged by soft water due to dezincification (selective corrosion of zinc from the alloy) – yellowish deposits, porous areas, leaky connections. Stainless steel is completely corrosion-resistant, suitable for all water qualities, and easily tolerates glycol contents of up to 50%. In the long run, stainless steel is the more cost-effective choice, even though the purchase price is slightly higher.
Rule of thumb: A maximum of 100–120 m of heating pipe per heating circuit. With a standard pipe spacing of 15 cm, this corresponds to approx. 15 m² of area per circuit. A room of 20 m² therefore needs 1–2 circuits. Important: Each room should have its own heating circuit so that the temperature can be regulated individually (GEG § 61). As a guideline: 4-room apartment (80 m²) = 6–8 circuits, detached house (150 m²) = 10–12 circuits.
Yes – GEG § 60 stipulates hydraulic balancing when replacing heating systems. Without balancing, one circuit heats too much, another too little. The integrated flow meter (0–5 l/min) at each manifold outlet allows for adjustment: Set the calculated target value (typically 1.5–3 l/min per circuit) and fix it with the adjustment screw. Details can be found in the guide Hydraulic Balancing.
For new systems and heat pumps: automatic deaerator recommended. It automatically removes air during filling and prevents air pockets during operation. For simple retrofits or if central deaeration is already present: manual deaerator is sufficient. Price difference: ~€8 surcharge for the automatic deaerator – a worthwhile investment.
Recessed Cabinet (UP): Flush with the wall, visually invisible – preferred for new builds as the shaft can be planned. Surface-mounted Cabinet (AP): Mounted on the wall, no wall breakthrough – ideal for retrofitting and basement installation. Both variants are available from MC Therm starting at approx. €42 and are suitable for distributors up to 12 circuits.
Yes – installing the manifold, making pipe connections, and screwing on actuators are no problem for experienced DIY enthusiasts. Pressure testing (6 bar, 24 h) and filling should be documented according to DIN EN 14336. A heating engineer should carry out the connection to the main heating system (shut-off valves, circulation pump). Detailed instructions: Installing the heating circuit distributor.
Customer Testimonials
What Our Customers Say
Verified reviews from customers using stainless steel manifold.
Order now
Stainless Steel Manifolds – from €49.69
Alle Komponenten perfekt abgestimmt. Ab 10 m². Lieferung in DE & EU.
5-year seal warranty · PZH-certified
GEG Section 60 hydraulic balancing compliant
Stainless steel – no dezincification, no corrosion
2–12 circuits · max. 6 bar · max. 70 °C