× National Flues
We have 100% 5 Star Reviews on Trustpilot
Free Delivery on All Orders Over £100
Enjoy Our Free Flue Design Service
Delivery To Mainland UK Addresses
Call Our Experts on 01670 206999

MI-VIT Lite - Increaser - Ø 125-150mm (27-125-008)

National Flues offers the MI-VIT Lite Increaser - Ø 125-150mm, a premium connecting pipe designed for modern heating systems. This top-quality flue component is engineered from zero carbon steel and finished in sleek matte black, ensuring durability and aesthetic appeal. Ideal for gas, oil, and solid fuel appliances, this product seamlessly integrates with flue liners, chimney stacks, or twin wall systems to maintain optimal airflow, safety, and energy efficiency.
£39.99
Give us a call if you find it cheaper and we'll try to price match.

 

Payment Options

At a Glance

    Zero Carbon Steel Construction
    Durable Powder Enamel Coating
    Sleek Matt Black Finish
    Suitable for Gas, Oil, and Solid Fuel Appliances
    Temperature Tolerance up to 600°C
    Friction Fit Joints with optional sealing for P1 applications
    Compliant with EN1856-2 T600 N1 standards

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 - Increaser Ø 125-150mm is a premium-grade connecting pipe designed to link your heating appliance to your flue liner, chimney stack, or twin wall flue system. Crafted from zero carbon steel and coated with a durable vitreous enamel in a sleek matte black finish, it is suitable for gas, oil, and solid fuel appliances with temperatures up to 600 degrees Celsius. This increaser enables a seamless transition within your flue system, ensuring smooth airflow and optimal performance.**Construction & Features:**- **Material:** Made from single-skin zero carbon steel with a vitreous enamel coating.- **Finish:** Matte black finish for a sleek look and long-lasting durability.- **Temperature Tolerance:** Suitable for appliances with temperatures up to 600°C.

Achieves a P1 pressure rating up to 200°C when fitted with a seal.**Installation Guidelines:**- **Proximity to Combustibles:** Do not install within 375mm of combustible materials such as wood or plasterboard.- **Orientation:** Ensure the smaller diameter points downward to contain condensates within the flue system.- **Joint Sealing:** Friction fit joints do not require seals for T600 installations; however, for pellet installations (P1 applications), seals must be applied to every joint.- **Cutting:** The pipe can be cut but be sure to cover exposed steel with high-temperature paint to prevent rust.- **Safety:** Always use appropriate PPE during installation.**Maintenance:**- **Inspection & Cleaning:** Regular inspections and cleaning are crucial, especially for solid fuel applications. It's recommended to install access doors at direction changes to facilitate maintenance.- **Frequency:** For solid fuel appliances, sweep and maintain the chimney at least once a year or as frequently as necessary.

SKU: 27-125-008

Technical Specifications
SKU27-125-008
Diameteru00d8 125-150mm
MaterialZero Carbon Steel
CoatingPowder Enamel
Coating Thickness0.3mm
Steel Thickness0.7mm
ColourMatt Black
Temperature ToleranceUp to 600u00b0C
ApprovalEN1856-2 T600 N1 Vm L8010 G375
Minimum Clearance To Combustibles375mm
- Ensure orientation: the smaller diameter should always point downward to contain condensates. - Maintain a clearance of at least 375mm from any combustible materials (e.g., wood, plasterboard). - For friction fit joints used in T600 installations, sealing is not necessary; however, apply seals on all joints for P1 applications (especially with pellet systems). - If the pipe is cut to size, immediately cover any exposed steel with high-temperature paint to prevent rust. - Always wear appropriate Personal Protective Equipment (PPE) during installation. - Consider installing access doors at directional changes to facilitate regular inspections and cleaning.

The MI-VIT Lite Increaser is used to connect your heating appliance to a flue liner, chimney stack, or twin wall flue system.

Yes, the MI-VIT Lite Increaser is suitable for gas, oil, and solid fuel appliances with temperatures up to 600°C.

No, you should not install the MI-VIT Lite Increaser within 375mm of combustible materials such as wood or plasterboard.

For T600 high-temperature installations, no sealing is needed due to its friction fit. For P1 positive pressure installations, seals are required on every joint.

It's recommended to inspect and clean your chimney at least once a year or as often as necessary for optimal performance and safety.

Yes, the pipe can be cut, but you must cover any exposed steel with high-temperature paint to prevent rusting.

Always wear appropriate Personal Protective Equipment (PPE) when installing the MI-VIT Lite Increaser to ensure your safety.
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Monday, May 19th. Delivery times of products not in our warehouses depend on product availability and shipping. If you need a definitive delivery time give us a call. If you need faster stove or fireplace delivery please also 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. Mi-Flex offers a lifetime guarantee. 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.

Read our review in our MI-VIT Lite - Increaser - Ø 125-150mm buyers guide

Choose the MI-VIT Lite Increaser now for a reliable, high-performance connection – your heating system deserves the best.

Your recently viewed products:

Multiple Payment Options- including Klarna, Clearpay, Mastercard, Visa and Paypal
Free Design Service Click To Call Our Experts