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Top Plate - Ø 200 (20-200-P)

National Flues presents the Top Plate Ø 200, the ultimate accessory for MI-FLEX chimney systems. Engineered to support flexible flue liners, this top plate is an essential component for ensuring compliance with Building Regulations Document J. With its robust design and compatibility with MI-FLEX 316 and 904 systems, our top plate offers a reliable, durable, and stylish solution for modern chimney installations.
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£10.99
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At a Glance

  • 400mm square design for a precise fit
  • Engineered for temperatures up to 600°C (T600)
  • Compatible with MI-FLEX 316 and 904 flexible flue liners
  • Natural / Stainless Steel finish for durability and aesthetics
  • Suitable for use with wood (<20% moisture), oil, gas, and smokeless coal appliances

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 Top Plate Ø 200, measuring 400mm square, is an essential accessory for ensuring the integrity and functionality of your chimney system. Designed to be used with MI-FLEX 316 and 904 flexible flue liners, this top plate supports the weight of the liner at the top of the stack. It is built for strength and durability, handling temperatures up to 600°C (T600 designation).

The installation must comply with Building Regulations Document J, which specifies that a flexible flue liner must be enclosed entirely within a masonry chimney. This top plate, in conjunction with a Top Clamp and Top Insert Sleeve, provides a complete and secure solution for flue installation. Ideal for use with wood (<20% moisture), smokeless coal, gas, and oil appliances, this top plate is tailored to high-performance standards.

Regular maintenance, including chimney sweeping by a HETAS-registered professional, is recommended to ensure optimal performance and longevity.

SKU: 20-200-P

Technical Specifications
Size400mm square
MaterialGalvanised Steel
Colour FinishNatural / Stainless Steel
Temperature Rating600u00b0C (T600)
System CompatibilityMI-FLEX 316 and 904 flexible flue liners
ApprovalsHETAS / CE
Fuels CompatibilityWood (<20% moisture), Oil, Gas, Smokeless Coal
For a safe and compliant installation, ensure that the Top Plate Ø 200 is fitted at the top of your masonry chimney where the MI-FLEX flexible flue liner terminates. It is essential to secure the top plate using the appropriate top clamp and insert sleeve. Installation must comply with Building Regulations Document J, which dictates that the flue liner and its supporting accessories be entirely enclosed within a masonry structure. Although some experienced DIY enthusiasts may attempt installation, we strongly recommend that a HETAS-registered professional carry out the process to guarantee proper installation and safety.

The top plate measures 400mm square, making it an ideal fit for MI-FLEX chimney systems.

This top plate is designed for use with MI-FLEX 316 and 904 flexible flue liners, suitable for wood (<20% moisture), smokeless coal, gas, and oil appliances.

The top plate can handle temperatures up to 600°C, ensuring it can cope with high-performance flue systems.

While DIY installation is possible, we strongly recommend having the chimney system installed by a competent person to ensure it complies with Building Regulations Document J.

Regular maintenance and chimney sweeping by a HETAS-registered professional are essential. Cleaning should be conducted at least twice a year for solid fuel appliances.

No, Building Regulations Document J requires that the flue liner and associated components must be fully enclosed within a masonry chimney.

A list of HETAS-registered chimney sweeps can be found at www.hetas.co.uk for safe and professional cleaning services.
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 Top Plate - Ø 200 buyers guide

Don't compromise on safety—add the Top Plate Ø 200 to your basket now!

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