× National Flues
We Will NOT Be Beaten on Price.
Free Delivery on Orders Over £100
5 Star Reviewed on Trustpilot
Free Flue Design Service Available
Help? 01670 206999 (8am-5pm)

Top Plate - Ø 125

Enhance your chimney system with the Top Plate - Ø 125 from National Flues, a premium accessory for MI-FLEX flexible flue liners. This high-quality component, with its robust GALV construction and natural stainless steel finish, is essential for maintaining the safety and efficiency of your fireplac... More...
Hover to Zoom / Click for Gallery
Now only £10.99
Including VAT Buy with confidence. If you find this cheaper within 48 hours of checkout, we'll refund the difference.

At a Glance

  • - Robust construction engineered for MI-FLEX 316 and 904 flexible flue liners
  • - 400mm square design for optimal weight distribution
  • - Suitable for multiple fuel types including wood, oil, gas, and smokeless coal
  • - Compliant with Building Regulations Document J and approved by HETAS/CE
  • - Engineered for high temperature performance (up to 600°C T600 designation)
  • - Made from durable GALV material with a Natural / Stainless Steel finish

 

Payment Options

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 125 is a critical component designed to provide strong support for MI-FLEX 316 and 904 flexible flue liners. Measuring 400mm square, this plate works in sync with a Top Clamp and Top Insert Sleeve, ensuring that the flue liner’s weight is effectively managed at the top of your chimney stack. Manufactured to comply with Building Regulations Document J, this top fixing accessory is suitable for a range of fuel types including wood (with moisture content <20%), smokeless coal, gas, and oil.

Rated for appliance use up to 600°C (T600 designation), our top plate guarantees a secure installation when adhered to correct guidelines. Proper chimney preparation is crucial – ensure that your chimney stack is fully weatherproofed, structurally sound, and that all pots are in good condition. For maintenance, an accessible design allows for easy inspection and cleaning, ideally performed twice a year by a certified professional, such as those registered with HETAS.

Cleaning should never involve chemical agents or mild steel tools to avoid damage to stainless steel parts. This top plate is not just a purchase; it’s a long-term investment in the safety and efficiency of your chimney system.

SKU: 20-125-P

Technical Specifications
Size400mm square
MaterialGALV (Galvanised)
FinishNatural / Stainless Steel
Compatible WithMI-FLEX 316 & 904 flexible flue liners
Fuel TypesWood (<20% moisture), oil, gas, smokeless coal
Temperature RatingUp to 600u00b0C (T600 designation)
CertificationsHETAS, CE
System DesignTop Plate works in tandem with Top Clamp and Top Insert Sleeve
Before installing the Top Plate - Ø 125, ensure that your chimney stack is fully weatherproofed and structurally sound. Begin by confirming all chimney pots are in optimal condition. The following steps should be adhered to for a secure installation: 1. Verify that the chimney lining is correctly positioned and that the flue liner fits seamlessly with the Top Plate, Top Clamp, and Top Insert Sleeve system. 2. Position the Top Plate at the top of the chimney stack, ensuring it is level and secure. 3. Follow all manufacturer guidelines and local Building Regulations to guarantee compliance and safety. 4. Schedule annual or biannual inspections by a certified professional (preferably a HETAS registered chimney sweep) to maintain safe operation. Warning: Do not use chemical cleaners or mild steel tools on the stainless steel components, as this may cause irreparable damage. Ensuring precise installation and regular maintenance will maximise the lifespan and effectiveness of your chimney system.

The Top Plate - Ø 125 measures 400mm square, making it suitable for supporting flexible flue liners at the top of a chimney stack.

The Top Plate is designed for use with MI-FLEX 316 and 904 flexible flue liners and is suitable for wood, smokeless coal, gas, and oil appliances.

Ensure that your chimney stack is fully weatherproofed, structurally sound, and that all chimney pots are in good condition before installation.

The Top Plate is rated for use with appliances up to a maximum temperature of 600°C (T600 designation).

Your chimney should be cleaned and inspected at least once a year, or ideally twice if used for solid fuels, by a certified professional.

No, chemical cleaners and mild steel tools should not be used on stainless steel chimneys to avoid damage.

For solid fuel appliances, a list of HETAS registered sweeps is available at www.hetas.co.uk.
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, April 8th. 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. If you find it cheaper within 48 hours, we'll refund the difference.

Read our buyers guide for this Top Plate - Ø 125

National Flues Ltd Verdict

The Top Plate - Ø 125 is an essential accessory for any chimney system using MI-FLEX 316 and 904 flexible flue liners. Reliable, robust, and designed to last, this component ensures your chimney's integrity and functionality. With our competitive pricing, nationwide delivery, and committed service to both retail and trade customers, National Flues is your dependable partner for all your flue and fireplace needs.

The Top Plate - Ø 125 is designed to securely support the weight of MI-FLEX 316 and 904 flexible flue liners at the top of a chimney stack, ensuring safe and effective operation.

National Flues is a leading supplier of fireplaces and flues across the UK, committed to providing high-quality products and reliable services to both retail and trade customers. With competitive pricing and nationwide delivery, we meet your fireplace and flue needs with unmatched expertise and efficiency.

 

Our Rating Image

Invest now in the quality you deserve – add to cart or call 01670 206 999.

Your recently viewed products:

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