
CORE Water Treatment by Smith Brothers
CORE continues to expand its Water Treatment range, delivering advanced, UK-manufactured solutions designed to protect, optimise and extend the life of commercial heating and chilled water systems. Built around performance, sustainability and ease of use, the CORE range provides everything required for effective system hygiene, cleaning and long-term protection.
- Magnetic Side Stream Filter Range (Now includes Plus and XL sizes)
- Full Flow Magnetic Filter
- Air & Dirt Separators
- Water Treatment Chemicals
- Inhibitor Quick Test Kits
CORE Side Stream Magnetic Filter
The CORE Side Stream Magnetic Filter is a BSRIA-compliant, three-in-one solution for commercial heating and cooling systems, combining a magnetic filter, air and dirt separator, and dosing pot. It effectively removes both magnetic and non-magnetic debris while maintaining optimal system performance.
Following widespread adoption and strong industry demand, the range has expanded to include Plus and XL sizes, delivering higher performance for larger and more demanding commercial and industrial applications.
Launched in 2025, the CORE Side Stream Magnetic Filter quickly achieved industry recognition, earning multiple award nominations for its innovative design, low carbon footprint and successful use in a major retrofit project at the University of Essex. The project was highly commended at The British Construction Industry Awards for improving filtration, efficiency, system reliability and supporting sustainability goals.
Click here to view the University of Essex case study.
View and Order: SBS Online – Magnetic and Chemical Free Filters
Full Flow Magnetic Filter

Ideal for large heating systems, The CORE Full Flow Magnetic Filter prevents the build-up of ferrous oxide and scale in central heating systems, reducing energy bills, increasing boiler life and reducing maintenance call-outs.
Utilising high-performance flow technology, the filter ensures that virtually 100% of unwanted debris is removed from the system. Available in sizes 2”- 3”.
View and Order: SBS Online – SBS Full Flow Magnetic Filter
Air & Dirt Separators
For use in sealed heating and cooling systems. Our CORE Air & Dirt Separators protect against damage from the deposition of dirt particles and from large amounts of dissolved and undissolved air.

CORE Air & Dirt Separators reduce corrosion by protecting pipes, fixings and vital system components, helping to extend system life and maintain peak efficiency. By preventing dirt build-up, they keep radiators, vessels and pipework clean while reducing reliance on system chemicals for a more sustainable approach to maintenance.
Featuring EN 1092-1 PN16 flanged connections, low flow resistance and operation at flow rates of up to 1.5 m/s, the range is backed by a 5-year warranty for long-term reliability and peace of mind.
View and Order: SBS Online – Air & Dirt Separators
Water Treatment Chemicals

CORE’s water treatment chemical range is designed to enhance system performance while reducing maintenance requirements, operating costs, energy use, water waste and carbon emissions.
CORE chemicals includes inhibitors, biocides, Leave-in, Heavy-Duty & system cleaners and glycol anti-freeze, providing complete protection for commercial heating, chilled and condenser systems. Solutions are available for corrosion and limescale prevention, bacterial control, system cleaning and freeze protection, and are fully compatible with CORE magnetic filtration products.
To help customers determine accurate dosing, CORE provides online chemical and glycol dosing calculators via the website.
Access the CORE Chemicals range and dosing calculators here.
View and order: SBS Online – Chemicals
Inhibitor Quick Test Kit
The CORE Inhibitor Quick Test Kit provides fast, accurate inhibitor concentration testing for commercial heating and chilled systems. After a system water sample is taken, test strips are dipped into the sample for 2 seconds, and results appear within 10 seconds.
The benefits:
- Fast and accurate testing of inhibitor levels in heating and chilled systems
- On-site results within 10 seconds
- Colour scale is included on the bottle
- Contains 50 test strips
View and order: SBS Online – CORE Inhibitor Quick Test Kit
Technical Documents
In addition to the CORE products, including the water treatment range, CORE has a dedicated technical documents page.
This resource allows users to quickly filter and access key documents, including data sheets, IOMs and WRAS certificates. You can also view and download these essential documents in the customer portal when you click on a CORE product. This ensures total transparency, project compliance and peace of mind.