Description
This is a compact magnetic and mesh filter designed specifically for modern heat-pump and sealed central‑heating loops. It uses a powerful removable magnetic rod plus a paired mesh element to trap ferrous sludge and larger non‑ferrous debris before they reach pumps, heat exchangers and valves — keeping heat transfer cleaner and reducing the risk of blockages and premature component wear.
The unit is intended to be fitted into the return pipe of a heating circuit and connects using the supplied Ø28 compression ball‑valves. It is a straightforward, passive device with no electrical supply: water flows through the body, non‑magnetic particles are arrested by the mesh and ferrous particles are attracted to the magnet, which can be withdrawn for cleaning via the service procedure.
How it works in practice
Two trapping mechanisms work together. A pair of stainless/plastic mesh elements (an 800µm and a finer 300µm mesh) remove larger debris and prevent coarse solids from circulating. The central magnetic rod (specified at 12,000 gauss) then captures magnetic black iron oxide and other ferrous wear particles that commonly form as systems age or after installation work. Collected material is held in the filter body and released through the integrated drain for servicing when the magnet and mesh are cleaned.
What installers and homeowners should expect
Physically the unit is lightweight and made from glass‑fibre reinforced nylon with brass isolation and drain valves, so it resists corrosion while keeping weight down for easier positioning. Its 530ml filter volume and low hydraulic resistance make it well suited to domestic and small commercial heat‑pump loops; the documented maximum flow is 6.9 m³/h. Typical use cases are air‑to‑water heat pumps, low‑temperature heating circuits and sealed central heating systems where preventing magnetic sludge build‑up will protect pumps and heat exchangers.
Installation is deliberately simple but requires a competent heating engineer: the product is designed to be fitted vertically on the return pipe (the manufacturer recommends the return) and comes with two Ø28 compression ball valves so it integrates into existing 28mm pipework without special adapters. The unit includes a top air bleed and a drain‑off valve to make routine servicing straightforward.
Service, limits and compatibility
Annual cleaning is advised in the manufacturer’s instructions. Servicing involves isolating the filter with the supplied ball valves, withdrawing the magnetic bar, draining the chamber, and removing and rinsing the mesh and body. The magnetic rod is very strong (12,000 gauss) so care is needed around people with pacemakers and sensitive electronics or magnetic media. The product is rated to operate up to 90°C with a working pressure listed at 3 bar and a maximum pressure of 12 bar (max dynamic pressure 1.5 bar).
Because the device combines a relatively large magnet with coarse mesh stages (300µm and 800µm), it is effective at removing the kinds of sludge and metallic debris that cause the most damage in hydronic systems. It is not a micro‑filtration device — very fine suspended solids below the 300µm stage will remain in circulation — so systems with unusually high particulate loads or specialist water quality needs may require additional treatment or pre‑filtration.
Key specifications
- Pipe connection: 28mm compression (supplied with 2 x Ø28 compression ball valves)
- Filter volume: 530 ml
- Magnet: removable rod, 12,000 gauss
- Mesh stages: 800 µm and 300 µm
- Maximum flow rate: 6.9 m³/h
- Working pressure: 3 bar; maximum pressure: 12 bar; max dynamic pressure: 1.5 bar
- Maximum operating temperature: 90°C
- Body material: glass‑fibre reinforced nylon; isolation and drain valves: brass
- Weight: 1.48 kg
For most residential heat‑pump installations this filter is a cost‑effective way of taking the strain off pumps and heat exchangers and reducing both service frequency and the risk of unexpected failures. Its straightforward service routine and included isolation valves make it easier for engineers to remove captured debris without draining the whole system.
Finally, check two practical points before purchase: confirm your system uses 28mm pipework or that you have appropriate transitions, and ensure the unit’s maximum flow and filter mesh sizes are compatible with your system’s design flow and particulate profile. For open‑vented systems the manufacturer advises location choices (the return is recommended and it should not be placed between the boiler and the overflow on an open‑vented system) and the installer must follow the supplied instructions for safe and effective fitting.
