👀 7 people are viewing this product
× National Flues
Free Delivery on Orders £100+
100% 5* reviewed on Trustpilot
Free stove flue design service
Delivery to mainland UK
Call for help on 01670 206999

MI-VIT Lite - Reducer - Ø 125-120mm (27-125-005)

National Flues presents the MI-VIT Lite Reducer - Ø 125-120mm, a high-quality flue reducer designed for optimal performance with gas, oil, and solid fuel appliances. This product combines robust zero carbon steel construction with a resilient powder enamel finish in an attractive matte black, ensuring durability and efficiency in every application. Perfect for connecting to your chimney, flue liner, or twin wall flue system, it stands as a reliable choice for those prioritising performance and l Read more...
The price you pay today £28.99
Give us a call if you find it cheaper and we'll normally price match.

 

Payment Options

At a Glance

    Constructed from durable zero carbon steel
    Coated in a robust powder enamel (0.3mm) for long-lasting protection
    Withstands temperatures up to 600°C
    Suitable for gas, oil, and solid fuel applications
    Elegant matte black finish enhances aesthetic appeal
    Engineered for safe flue connections with a minimum 375mm distance from combustibles
    Designed for straightforward maintenance with integrated access doors
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, July 1st. This is based on current delivery times for this product. Delivery for products not in our warehouses can be delayed because of third party carriers. If you need a stove, or other bulky product, to be delivered by a specific time in the next 7 days then please give us a call. We can sometimes reduce longer lead times if we pay the carrier £25 for express delivery. Visit our Shipping Information page for more information.

Warranty & Returns +

All our products come with warranties and you can read in our blog about they types and terms and conditions for warranties. Mi-Flex flue liner, for example, comes with a lifetime guarantee. Give us a call if you want to know about a specific warranty. Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.

Price Match Guarantee +

We will match any price, like-for-like, on a retail basis. Give us a call if you find it cheaper and want to buy from us.

We Won't Be Beaten On Price

At National Flues, we continuously monitor competitor prices. This ensures that we consistently offer you the best deals on all our products. Here’s how we keep your costs low:

  • Daily Price Matching: Our team adjusts prices to ensure we stay competitive.
  • Bulk Purchasing Power: We sell a lot, so we can negotiate better rates with suppliers, passing the savings directly to you.
  • Operational Efficiency: We have streamlined processes to reduce overhead.

Price Match Guarantee: If you find the same product cheaper within 48 hours, we’ll match it and refund the difference.

Free Delivery Over £100: Orders over £100 are free delivery (call us if delivery is required outside the mainland UK).

“I saved 20% on my purchase compared to other retailers. Exceptional service!” – Jane D.

Have Questions?
Phone: 01670 206999
Email: [email protected]

The MI-VIT Lite Reducer - Ø 125-120mm is your top choice for connecting pipes between your appliance and your Flue Liner, Chimney Stack, or Twin Wall Flue System. Designed for use with gas, oil, and solid fuel appliances, it can handle temperatures up to 600 degrees Celsius. Manufactured from zero carbon steel and coated with a durable vitreous enamel finish in matte black, this reducer is built to last.

When used with a seal, it can achieve a P1 pressure rating up to 200 degrees Celsius (T200). Ensure it is installed at least 375mm away from any combustible materials and that it’s fitted correctly with the smaller diameter pointing downward to keep condensates inside the flue system. Maintenance is easy, allowing access doors for cleaning and inspection, essential for solid fuel applications.

Make sure to sweep chimneys at least once a year or as frequently as necessary.

SKU: 27-125-005

Technical Specifications
SKU27-125-005
MaterialZero Carbon Steel
Steel Thickness0.7mm
CoatingPowder Enamel
Coating Thickness0.3mm
ColourMatt Black
ApprovalEN1856-2 T600 N1 Vm L8010 G375
Maximum Temperature600u00b0C
Minimum Distance To Combustibles375mm
Pressure RatingT200 with seal (for positive pressure applications)
Ensure that the reducer is installed with the smaller diameter oriented downwards to retain condensates within the flue system. Maintain a clearance of at least 375mm from any combustible materials to comply with safety regulations. When sealing is required (for P1 applications), ensure that all joints are meticulously sealed to achieve the designated pressure rating. Regular inspection and maintenance—especially for solid fuel systems—is critical; take care that access doors remain unobstructed to facilitate cleaning and inspection. Always refer to the manufacturer’s installation guidelines to confirm compatibility with your specific flue configuration.

Yes, it is suitable for gas, oil, and solid fuel appliances.

The reducer can withstand temperatures up to 600 degrees Celsius.

For T600 high temperature installations, sealing is not necessary; however, for Pellet installations with positive pressure (P1 applications), every joint must be sealed.

The smaller diameter should point downward to keep condensates inside the flue system. It should be installed at least 375mm away from any combustible material.

For solid fuel applications, chimneys should be swept and maintained at least once a year. Access doors should be installed at changes of direction to facilitate cleaning and inspection.

Yes, it can be cut, but any exposed steel must be covered with high-temperature paint to prevent rusting.

No, the Super Matt pipe should not be used to pass through ceilings or combustible walls.

Your recently viewed products:

Multiple Payment Options- including Klarna, Clearpay, Mastercard, Visa and Paypal