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MPN: VM01DUO

Estimated Delivery: 3 - 5 Working Days

Grant Mag One Duo Magnetic 28mm Filter with Reducers

Grant Mag One Duo Magnetic 28mm Filter with Reducers


Regular price £172.53 Excl. VAT
£207.04 Incl. VAT
Sale price £172.53 Excl. VAT
£207.04 Incl. VAT
Regular price
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Key Information

Product Information

Grant Mag One Duo Magnetic 28mm Filter with Reducers

The Grant Mag One Duo Magnetic Filter is designed to help protect central heating and renewable heating systems from the build-up of debris. By capturing contaminants from the circulating water, it helps keep the system cleaner, supporting efficient operation and potentially extending the working life of key heating components. Featuring a direct filtration design, the Mag One Duo improves the overall filtration process compared with the Vortex Mag One. The design ensures that circulated system water passes through the filter cartridge, helping maximise the capture of debris and providing effective long-term system protection.

Effective Magnetic and Non-Ferrous Filtration

The Grant Mag One Duo uses a powerful 12,000 gauss neodymium magnet to capture magnetic debris within the heating system. A 500-micron mesh gauze also captures non-ferrous debris, providing protection against different types of contaminants that can circulate through a heating system. By helping remove this debris from the system water, the filter can support cleaner pipework and components, helping maintain system efficiency and contribute to a longer system lifespan.

Universal Heating System Compatibility

The Mag One Duo is designed to work with a wide range of heating systems. It can be installed alongside traditional oil and gas boilers, as well as renewable systems such as air source heat pumps. It is suitable for boiler systems up to 36kW heating output or heat pump systems up to 10kW heating output. For larger systems, two Mag One Duo filters can be installed in a parallel circuit to provide the required filtration capacity.

Flexible Installation

Designed with installers in mind, the Grant Mag One Duo can be installed through 360°, providing greater flexibility when choosing the most convenient installation position. It can be fitted to new heating systems or retrofitted to existing installations, making it a versatile option for both upgrades and new projects. The filter is supplied with 28mm chrome isolation valves with 22mm reducers, along with a hose adaptor for remote draining. It is also compatible with all system inhibitors and glycol solutions, providing additional flexibility across different heating system setups.

Designed for Long-Term System Protection

By combining magnetic and non-ferrous filtration in a direct filtration design, the Grant Mag One Duo provides comprehensive protection against circulating debris. Regular filtration can help maintain cleaner system water and support the efficient operation and longevity of the heating system.

Key Features

  • Direct filtration design for improved overall filtration levels
  • Suitable for new heating systems and retrofitting to existing systems
  • Helps protect system efficiency and support longer system lifespan
  • 12,000 gauss neodymium magnet captures magnetic system debris
  • 500-micron mesh gauze captures non-ferrous debris
  • Compatible with oil and gas boilers
  • Compatible with air source heat pumps
  • Suitable for boiler systems up to 36kW heating output
  • Suitable for heat pump systems up to 10kW heating output
  • 360° installation capability
  • Supplied with 28mm chrome isolation valves and 22mm reducers
  • Hose adaptor supplied for remote draining
  • Compatible with all system inhibitors and glycol solutions

Frequently Asked Questions

What does the Grant Mag One Duo Magnetic Filter do?

The Grant Mag One Duo helps remove debris from circulating heating system water. Its 12,000 gauss neodymium magnet captures magnetic debris, while the 500-micron mesh gauze captures non-ferrous debris, helping protect the system and its components.

Can the Mag One Duo be used with an air source heat pump?

Yes. The Grant Mag One Duo is compatible with air source heat pump systems up to 10kW heating output, as well as traditional oil and gas boiler systems. For larger heating systems, two filters can be installed in a parallel circuit.

Can the Grant Mag One Duo be fitted to an existing heating system?

Yes. The filter can be installed as part of a new heating system or retrofitted to an existing system. Its 360° installation capability provides flexibility when selecting a suitable position for installation.

Why Choose Us

At JJ Building Materials, we're committed to supplying quality building products at competitive prices, backed by the service and expertise you'd expect from an established independent merchant. Whether you're a trade professional managing large-scale projects or a homeowner taking on a DIY renovation, we're here to help you find the right products for the job.

As part of the JJ Roofing Supplies Group, we build on decades of experience supplying construction materials across the UK. We've expanded beyond roofing to offer a growing range of building materials, including timber, insulation, landscaping products, plumbing supplies, flooring, doors, bricks, fencing, garden buildings and much more – all available to order online with nationwide delivery.

We work with many of the industry's leading manufacturers to bring you trusted products that meet the highest standards of quality and performance. Our team is passionate about providing excellent customer service, competitive pricing and a straightforward shopping experience from start to finish.

When you shop with JJ Building Materials, you can expect:

  • Competitive prices on leading brands and quality products.
  • Nationwide delivery across the UK
  • A constantly expanding range of building and landscaping materials.
  • Friendly, knowledgeable customer support.
  • A trusted business backed by the JJ Roofing Supplies Group.

Delivery

Every order is personally reviewed by our experienced team to ensure everything is correct before dispatch. We offer delivery from as little as the next working day on selected products, so please refer to the dark blue Estimated Delivery box above for the expected delivery timeframe for this item.

We work with trusted manufacturers and specialist delivery partners to ensure your order arrives safely and on time. You'll receive tracking details once your order has been dispatched, and if we need to confirm any delivery details, one of our team will contact you directly to keep everything running smoothly.

Roof Tiles & Fittings:

We recommend ordering an additional 10% of roof tiles to allow for any breakages that may occur during delivery or handling. Roof tiles are naturally fragile, and having a few extra on site helps prevent delays and ensures your roofing project can be completed without interruption.

Multiple Products from the Same Supplier

If you're ordering multiple products from the same supplier, your order will be dispatched together once all items are ready. This means the longest lead time will apply.

If you need part of your order sooner, please call us on 01202 113233. We can arrange a split delivery, although an additional shipping charge will apply.

Grant Mag One Duo Magnetic 28mm Filter with Reducers

£172.53

Can I collect this product from a local branch?

Absolutely. Check availability at your nearest branch during checkout or contact us directly.

Do you offer bulk pricing or trade discounts?

Yes, we offer competitive rates for trade customers and bulk orders. Contact our team for a tailored quote.

What if the product arrives damaged?

Please notify us within 48 hours of delivery. We’ll arrange a prompt replacement or refund as needed.

How fast is the delivery time?

Most items are delivered within 2–5 working days, depending on stock and location. Some products may take longer times.

What is the Return Policy?

We accept most returns within 14 days of delivery, provided the items are unused, in their original packaging, and in resalable condition. Please contact our customer service team to arrange a return or discuss any concerns.