Magnetic filters for heating systems
Magnetic filters for heating systems are designed to catch rust as well as ferromagnetic debris, sludge and dirt. They protect the system from damage and extend the working life, especially of circulating pumps and heat exchangers. Modern circulator pumps, whether they are located inside or outside boilers, are now more energy-efficient thanks to using permanent magnet motors. However, this design can cause the settlement of ferrous particles typical for heating systems which can cause pump or heat exchanger damage.
We therefore recommend installing a magnetic filter prior to the pump, e. g. prior to the hot water inlet to the boiler. This eliminates potential problems with metallic contaminants and ensures long working life of the boiler pumps. Magnetic filters are thus an essential part of modern heating systems.
Magnetic filters consist of the following parts:
- Magnetic rod – this magnetic core consists of high intensity neodymium magnets. The magnetic rod perfectly attracts and separates even very fine ferrous contamination, which leads to an extended working life of the circulating pumps and heat exchangers of the heating system. Magnetic performance is between 7,000 - 9,000 G, according to filter type.
- Mesh strainer - mesh size of 800 µm. The mesh strainer can catch very small and also non-magnetic particles.
Magnetic filters for heating also differ in the pressure for which they are designed. We offer standard magnetic filters for operating pressures from 3 to 12 bar.
When selecting a magnetic filter, the size and type of heating system, water flow rate and other technical parameters must be taken into account.
Easy placing an order in e-shop
Customer care
Your project will be taken care of by us from beginning up to the very end. It does not end with the order placed at us. We will provide the full support for all the time of the use of the separator.
1. We will come
2. We will align and design
3. We will make a made-to-measure product
4. We will install
5. We will put into operation and school in
6. We will provide authorized service
We guarantee tests withing three days!
Make sure that our device perfectly meets your expectations!
We will provide tests of your material on our magnetic separators for FREE!
Magnetic mini filter for heating
7 000 G / 3 bar
- Inlet/outlet diameter: 3/4“
- Working pressure: up to 3 bar
- Magnetic performance: 7,000 G
- Mesh strainer: 800 µm
- Operating temperature: 0 - 90° C
Magnetic filter
for heating
9 000 G / 6 bar
- Inlet/outlet diameter: 3/4“
- Working pressure: up to 6 bar
- Magnetic performance: 9,000 G
- Mesh strainer: 800 µm
- Operating temperature: 0 - 90° C
Instructions for use
Modern energy-efficient circulation pumps (EC pumps) in boilers use magnetic inserts that make them more energy-efficient — however, this design increases their sensitivity to the accumulation of metallic contaminants that naturally form in every heating system through corrosion and component wear. The magnetic filter captures these contaminants before they reach the pump, preventing its failure or premature replacement. Problems caused by metallic contaminants typically only manifest after a longer period, when repair costs are significantly higher than the price of the filter.
The filters differ in maximum working pressure and magnetic flux density. The Mini 7,000 G / 3 bar variant is the basic model for low-pressure systems; the 9,000 G / 6 bar and 9,000 G / 12 bar variants offer higher magnetic flux density and are designed for systems with higher operating pressure. All three models share the same 3/4" connection dimensions, 800 µm mesh size and temperature resistance of 0–90 °C.
We recommend installing the filter on the return pipe just before the heating water enters the boiler or before the circulation pump. This is where the concentration of contaminants is highest — the filter captures them before they reach the sensitive components. We recommend entrusting installation to a qualified professional.
Every filter is equipped with a magnetic rod with neodymium magnets and a mesh with an 800 µm pore size. The magnetic rod captures ferromagnetic contaminants — rust, magnetite and metal particles — at the micrometre scale; the mesh then mechanically captures coarser non-magnetic contaminants larger than 800 µm. Thanks to the combination of both principles, the filter protects the system against a broader spectrum of pollutants than a conventional dirt separator.
After the first installation, we recommend cleaning the filter after just a few days — in a previously unprotected system it will capture a large amount of contaminants accumulated during operation all at once. Thereafter, cleaning approximately once a year is sufficient, ideally during the regular boiler service. The exact cleaning procedure is described in the operating instructions for each filter variant, available for download on the product page.
A conventional dirt separator only captures mechanical contaminants larger than the mesh size; the magnetic filter additionally captures very fine ferromagnetic contaminants that the mesh alone cannot handle. Our filters combine both principles — a magnetic rod with neodymium magnets and an 800 µm mesh — covering a broader spectrum of contaminants in a single body. For systems with new EC pumps, the magnetic component is particularly important, as these pumps are structurally more sensitive to metallic contaminants.
A clean heating system without deposits operates with lower hydraulic resistance, which reduces the energy consumption of the circulation pump and boiler. By capturing contaminants, the filter also extends the service life of pumps, valves and heat exchangers and reduces the cost of service interventions or component replacement. The investment in a magnetic filter thus pays off through lower energy consumption and a longer service life of the entire system.