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Top Plate - Ø 250 (20-250-P)

Discover the exceptional quality of the Top Plate Ø 250 from National Flues, a premium accessory designed to provide robust support for flexible flue liners. Perfectly engineered for MI-FLEX 316 and 904 systems, this durable chimney support component ensures secure installation and long-lasting performance. With a natural stainless steel finish and compliance with BSEN standards, it is a reliable solution for various fuel types, making it an ideal choice for both residential and commercial applications.
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At a Glance

    Robust 400mm square design for secure chimney support

    Constructed from high-grade 316L stainless steel for durability and corrosion resistance

    Engineered for MI-FLEX 316 and 904 flexible flue liners

    Complies with BSEN 1856-2 T600 N1 W V2 L50012 G standards

    Suitable for multiple fuel types including wood, oil, gas, and smokeless coal

Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, July 8th. This is based on current lead times for this product. 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 on 01670 206 999. 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.

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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.

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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).

“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 250, measuring 400mm square, is an integral part of your chimney system designed to provide robust support for MI-FLEX 316 and 904 flexible flue liners. This top plate, in conjunction with the Top Clamp and Top Insert Sleeve, ensures that the flue liner remains securely positioned at the top of the stack, effectively bearing its vertical weight. Adhering to Building Regulations Document J, this setup is suitable for wood (less than 20% moisture), smokeless coal, gas, and oil appliances up to a searing 600°C (T600 designation).

It's imperative that the enclosing chimney is made of sound masonry with proper weatherproofing and flaunching. For optimal functionality and safety, ensure regular maintenance, including at least annual sweeps by a competent person, ideally twice a year for solid fuel systems. Chemical cleaners and mild steel tools should not be used on stainless steel chimneys.

SKU: 20-250-P

Technical Specifications
Dimensions400mm x 400mm square
Material316L Stainless Steel
Colour FinishNatural / Stainless Steel
Fuel CompatibilityWood (<20% moisture), Smokeless Coal, Gas, Oil
Temperature RatingUp to 600u00b0C (T600 designation)
CertificationsHETAS / CE
System CompatibilityMI-FLEX Accessories MF20 (316 and 904 flue liners)
Before installation, ensure that the chimney stack is fully weatherproofed and constructed of sound masonry. The Top Plate Ø 250 must be installed in conjunction with the Top Clamp and Top Insert Sleeve to keep the flexible flue liner securely in place at the top of the chimney. It is vital to follow the manufacturer's guidelines closely and ensure that all flue components are correctly aligned and secured. Regular maintenance is essential; inspect and clean the system at least once a year, or twice per year for solid fuel systems, using only recommended tools and non-corrosive cleaning methods. Avoid using chemical cleaners or mild steel tools on stainless steel components to maintain the integrity and longevity of your chimney.

The Top Plate Ø 250 measures 400mm square.

The Top Plate Ø 250 is specifically designed for use with MI-FLEX 316 and 904 flexible flue liners.

The top plate is suitable for wood with less than 20% moisture, smokeless coal, gas, and oil appliances up to 600°C.

Yes, the chimney stack must be fully weatherproofed, and in sound condition before installing the Top Plate Ø 250.

The chimney system should be inspected and cleaned at least once a year. For solid fuel appliances, it is recommended to sweep the chimney twice a year.

Chimney sweeping should be carried out by a competent person, preferably a HETAS registered sweep for solid fuel applications.

No, you should not use chemical cleaners or mild steel tools on stainless steel chimneys.

What our experts say!

"The Top Plate Ø 250 is an essential component for chimney systems using MI-FLEX 316 and 904 flue liners. With our reliable nationwide delivery and competitive pricing, National Flues ensures you get top-notch quality and value whether you're a retail or trade customer."

The Top Plate Ø 250 is designed to support the vertical weight of flexible flue liners in chimney systems, ensuring stability and compliance with building regulations.

National Flues is a trusted supplier of high-quality fireplaces and flues, catering to both retail and trade customers across the UK. Known for competitive pricing and reliable delivery, we offer secure online payments and dedicated trade accounts.

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