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Register Plate Adaptor - Ø 150 (20-125-THAR)

Discover the premium Register Plate Adaptor - Ø 150 from National Flues, engineered for flawless MI-FLEX flue liner installations. This high-performance chimney accessory ensures a secure, gas-tight seal while meeting the stringent requirements of Building Regulations Document J. Ideal for a wide range of fuels including wood, oil, gas, and smokeless coal, this adaptor is a must-have for anyone looking to upgrade their chimney system. Enhance your fireplaces and flue installations with reliability and style.
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£85.49
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At a Glance

  • 316L stainless steel construction for exceptional durability
  • 0.6mm thickness ensuring a robust and lightweight design
  • Engineered for a secure, gas-tight seal with a rebated connection
  • Compatible with MI-FLEX flexible flue liners and various fuel types
  • Complies with BSEN 1856-2 and HETAS 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.
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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).

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

Our Register Plate Adaptor - Ø 150, part of the premium MF20 MI-FLEX accessories range, is crafted from 0.6mm 316 stainless steel, ensuring superior durability and performance. Specifically designed for use with MI-FLEX 316 and 904 flexible flue liners, it serves as an essential component in the creation of a full system chimney. This adaptor enables a gas-tight seal when transitioning from the connecting flue system to the flexible flue liner, ensuring safety and compliance with Building Regulations Document J.

Suitable for appliances operating up to 600°C and compatible with various fuels including wood with less than 20% moisture, smokeless coal, gas, and oil. Maintenance friendly, this product ensures easy sweeping and inspection, adhering to HETAS standards for solid fuel appliances.

SKU: 20-125-THAR

Technical Specifications
Material316L Stainless Steel
Thickness0.6mm
Colour FinishNatural / Stainless Steel
DesignationBSEN 1856-2 T600 N1 W V2 L50012 G
SystemMI-FLEX Accessories MF20
Fuel CompatibilityWood (with <20% moisture), Oil, Gas, Smokeless Coal
Maximum Temperature600u00b0C
Install the adaptor at the base of the chimney on the underside of the register plate. Ensure that a proper seal is achieved by using fire cement, ceramic rope, or a high-temperature sealant. The innovative rebated connection is designed to facilitate easy integration and disconnection of your stove with the flexible flue liner. Always follow the manufacturer’s installation instructions and consult a qualified professional if unsure about any part of the process. Note that Building Regulations Document J requires the installation within a masonry chimney.

The Register Plate Adaptor allows for a secure transition from the connecting flue system to a flexible flue liner, ensuring a gas-tight seal within a masonry chimney.

Yes, it is suitable for use with wood (less than 20% moisture), smokeless coal, gas, and oil appliances operating up to 600°C.

Regular chimney sweeping and inspections should be conducted at least once a year. For solid fuel appliances, it is recommended to perform maintenance twice a year.

No, Building Regulations Document J requires that flexible flue liners are installed within a masonry chimney only.

It is installed at the base of the chimney on the underside of the register plate, featuring a rebated connection for seamless stove integration.

For a gas-tight seal, you will need fire cement, ceramic rope or tape, or high-temperature sealant.

316 stainless steel offers excellent corrosion resistance and durability, making it ideal for high-temperature applications and ensuring a long-lasting, reliable installation.
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Wednesday, April 30th. If you need faster stove or fireplace delivery please give us a call. We can often 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 Register Plate Adaptor - Ø 150 buyers guide

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