The Story
The Spirotech SpiroTrap MB3 (UE022WJ) is a 22mm brass magnetic dirt separator designed for closed central heating and cooling systems. Using a full-flow settling principle combined with an external neodymium magnet, it continuously strips particles from 5 μm — including magnetite — from circulating system water. Independent research confirms that pairing an MB3 with a SpiroVent RV2 deaerator can reduce gas consumption by up to 13%.
Install on the return pipe, at the point where system water re-enters the boiler or heat source. The unit must be installed vertically with the socket pointing downward to allow gravity-assisted dirt collection. Ensure the drain valve is always accessible for annual servicing.
The SpiroTrap MB3 is not suitable for open-vented systems, solar circuits, or mains-pressure domestic hot water. Maximum glycol concentration is 50% v/v ethylene glycol. For solar applications, see dedicated SpiroVent Solar products.
Independent research commissioned by Spirotech demonstrated that a SpiroTrap MB3 + SpiroVent RV2 combination reduces gas consumption by up to 13% in standard residential central heating systems. The saving comes from eliminating corrosion by-products that impede heat-exchanger efficiency over time.
Full-Flow Settling Principle
Unlike cartridge filters that restrict flow, the MB3 widens the flow path internally, reducing velocity and causing particles to settle into the collection chamber. No bypass, no isolating valves, no disposable filter element — consistent low pressure drop at all flow rates.
External Neodymium Magnet
The slide-off magnetic jacket concentrates flux inside the collection chamber, capturing even sub-5 μm magnetite particles. Maintenance takes seconds: remove the jacket, open the drain valve, collected sludge purges under system pressure — no system shutdown required.
Universal Compression Connection
The 22mm compression coupling accepts standard 22mm copper or plastic pipe. The swivel design allows the drain valve to be oriented in any direction post-installation, so the pipe arrangement doesn't dictate access.
SpiroLIFE 20-Year Guarantee
Spirotech backs all brass SpiroTrap MB3 units with a 20-year SpiroLIFE warranty when operating below 110 °C — a direct reflection of the all-brass construction and the absence of replaceable internal components that could degrade.
Technical Specification — SpiroTrap MB3 22mm (UE022WJ)
| Connection & Hydraulics | |
|---|---|
| Article Number | UE022WJ |
| Product Type | SpiroTrap MB3 — 22mm — Magnet — Universal Connection |
| Connection | 22mm compression ring (with couplers) |
| Flow Direction | Variable (reversible) |
| Max Flow Rate | 1.3 m³/h |
| Kvs Value | 9.07 m³/h |
| Inlet/Outlet Offset | 0 mm (in-line) |
| Operating Limits | |
| Max Operating Pressure | 10 bar (PN 10) |
| Temperature Range | 0 – 110 °C (continuous) |
| Max Glycol (Ethylene) | 50% v/v |
| Suitable for Heating | Yes |
| Suitable for Cooling | Yes |
| Closed System | Yes |
| Open System | No |
| Solar Applications | No |
| Physical & Construction | |
| Housing Material | Brass |
| Magnet Type | Neodymium (external jacket) |
| Separator Principle | Full-flow with settling |
| Filter Volume | 0.36 litres |
| Construction Length | 92 mm |
| With Drain Tap | Yes |
| Auto De-aerator Included | No |
| Compliance & Warranty | |
| Design Standard | EN 13445 |
| CE Marking | 2014/68/EU (Pressure Equipment Directive) |
| Warranty | 20 years — SpiroLIFE |
Frequently Asked Questions
Where should the SpiroTrap MB3 22mm be installed?
How often does the MB3 need servicing?
Is the UE022WJ suitable for heat pump systems?
What is the difference between the MB3, MBC1, and MBL?
Can the MB3 be used with underfloor heating systems containing antifreeze?
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
The Spirotech SpiroTrap MB3 (UE022WJ) is a 22mm brass magnetic dirt separator designed for closed central heating and cooling systems. Using a full-flow settling principle combined with an external neodymium magnet, it continuously strips particles from 5 μm — including magnetite — from circulating system water. Independent research confirms that pairing an MB3 with a SpiroVent RV2 deaerator can reduce gas consumption by up to 13%.
Install on the return pipe, at the point where system water re-enters the boiler or heat source. The unit must be installed vertically with the socket pointing downward to allow gravity-assisted dirt collection. Ensure the drain valve is always accessible for annual servicing.
The SpiroTrap MB3 is not suitable for open-vented systems, solar circuits, or mains-pressure domestic hot water. Maximum glycol concentration is 50% v/v ethylene glycol. For solar applications, see dedicated SpiroVent Solar products.
Independent research commissioned by Spirotech demonstrated that a SpiroTrap MB3 + SpiroVent RV2 combination reduces gas consumption by up to 13% in standard residential central heating systems. The saving comes from eliminating corrosion by-products that impede heat-exchanger efficiency over time.
Full-Flow Settling Principle
Unlike cartridge filters that restrict flow, the MB3 widens the flow path internally, reducing velocity and causing particles to settle into the collection chamber. No bypass, no isolating valves, no disposable filter element — consistent low pressure drop at all flow rates.
External Neodymium Magnet
The slide-off magnetic jacket concentrates flux inside the collection chamber, capturing even sub-5 μm magnetite particles. Maintenance takes seconds: remove the jacket, open the drain valve, collected sludge purges under system pressure — no system shutdown required.
Universal Compression Connection
The 22mm compression coupling accepts standard 22mm copper or plastic pipe. The swivel design allows the drain valve to be oriented in any direction post-installation, so the pipe arrangement doesn't dictate access.
SpiroLIFE 20-Year Guarantee
Spirotech backs all brass SpiroTrap MB3 units with a 20-year SpiroLIFE warranty when operating below 110 °C — a direct reflection of the all-brass construction and the absence of replaceable internal components that could degrade.
Technical Specification — SpiroTrap MB3 22mm (UE022WJ)
| Connection & Hydraulics | |
|---|---|
| Article Number | UE022WJ |
| Product Type | SpiroTrap MB3 — 22mm — Magnet — Universal Connection |
| Connection | 22mm compression ring (with couplers) |
| Flow Direction | Variable (reversible) |
| Max Flow Rate | 1.3 m³/h |
| Kvs Value | 9.07 m³/h |
| Inlet/Outlet Offset | 0 mm (in-line) |
| Operating Limits | |
| Max Operating Pressure | 10 bar (PN 10) |
| Temperature Range | 0 – 110 °C (continuous) |
| Max Glycol (Ethylene) | 50% v/v |
| Suitable for Heating | Yes |
| Suitable for Cooling | Yes |
| Closed System | Yes |
| Open System | No |
| Solar Applications | No |
| Physical & Construction | |
| Housing Material | Brass |
| Magnet Type | Neodymium (external jacket) |
| Separator Principle | Full-flow with settling |
| Filter Volume | 0.36 litres |
| Construction Length | 92 mm |
| With Drain Tap | Yes |
| Auto De-aerator Included | No |
| Compliance & Warranty | |
| Design Standard | EN 13445 |
| CE Marking | 2014/68/EU (Pressure Equipment Directive) |
| Warranty | 20 years — SpiroLIFE |
