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Top Plate - Ø 300 (20-300-P)
The MI-FLEX Top Plate Ø 300 is a premium accessory built to support and secure your flexible flue liner installations. Engineered with precision and durability in mind, this top plate is an essential component for both domestic and trade chimney systems. Its compatibility with multiple fuel types such as wood, oil, gas, and smokeless coal makes it a versatile choice for any installation. Trust in MI-FLEX—renowned for superior quality and reliability—to deliver a product that meets rigorous safety standards and elevates your chimney's overall performance.
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In Stock
£14.99
Give us a call if you find it cheaper and we'll try to price match.
At a Glance
Robust top support for MI-FLEX flue liners
Withstands temperatures up to 600°C (T600)
Suitable for wood (with ≤20% moisture), oil, gas, and smokeless coal
Made of durable GALV with a Natural/Stainless Steel finish
Complies with Building Regulations Document J for safe installations
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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.
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.
The Top Plate Ø 300 is an essential component for anyone installing MI-FLEX 316L and 904 flexible flue liners. Designed to provide robust support at the top of your chimney stack, this top plate works in conjunction with a Top Clamp and Top Insert Sleeve to safely bear the vertical (dead) weight of your flue liner. As per Building Regulations Document J, it is imperative that flue liners are installed entirely within a masonry chimney for safety and efficiency.
Suitable for use at up to 600°C (T600), the plate can be deployed on appliances burning wood (with less than 20% moisture), smokeless coal, gas, and oil. Ensuring a weatherproofed chimney stack and sound chimney construction are prerequisites for its installation.
- Ensure your masonry chimney is fully weatherproofed and structurally sound before installation.
- Install the Top Plate Ø 300 within the chimney stack in compliance with Building Regulations Document J.
- Use in conjunction with the Top Clamp and Top Insert Sleeve to safely support the vertical load of the flue liner.
- Follow the manufacturer’s installation guidelines precisely to ensure safety and performance.
- Regular maintenance is required; have your chimney swept at least twice a year by a competent professional.
- Avoid the use of chemical cleaners and mild steel tools to maintain the integrity of the stainless steel components.
The Top Plate Ø 300 is compatible with MI-FLEX 316L and 904 flexible flue liners.
No, Building Regulations Document J specifies that flexible flue liners must be installed within a masonry chimney.
It is designed to withstand temperatures of up to 600°C (T600 designation).
It is suitable for use with wood (with less than 20% moisture), smokeless coal, gas, and oil.
Yes, regular maintenance and sweeping by a competent person are required. Chimneys serving solid fuel appliances should be swept at least twice a year.
No, chemical cleaners and mild steel tools should not be used for maintaining stainless steel chimneys.
Yes, the chimney stack must be fully weatherproofed and structurally sound before 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 Top Plate - Ø 300 buyers guide
Introduction
When it comes to ensuring the safety and efficiency of your chimney system, every component matters. The Top Plate Ø 300 is designed to offer unmatched support and durability for MI-FLEX flexible flue liners. This guide will walk you through the importance of selecting top-quality accessories, the specific benefits of the Top Plate Ø 300, and how to seamlessly integrate it into your existing chimney system.
Why the Top Plate Ø 300 is Essential
The Top Plate Ø 300 is not just any accessory—it is a critical element that stabilises the flue liner at the top of the chimney stack. By effectively bearing the vertical (dead) weight of the flue liner, this plate ensures that your chimney remains safe and compliant with Building Regulations Document J. Safety and reliability are at the forefront of chimney installations, and with this top plate, you are investing in a product that has been engineered to meet those exacting standards.
Key Features and Benefits
- Robust Construction: Made from durable GALV with a natural/stainless steel finish, the Top Plate Ø 300 is built to withstand high temperatures up to 600°C. This ensures that it can operate safely under the most demanding conditions, providing long-term performance and peace of mind.
- Fuel Versatility: Whether you are using wood (with less than 20% moisture), oil, gas, or smokeless coal, the Top Plate Ø 300 is adaptable. Its design caters to multiple fuel types, making it the most versatile option for various heating systems.
- Compliance with Safety Regulations: Adhering to Building Regulations Document J is crucial for any chimney installation. The Top Plate Ø 300 meets and exceeds these standards, ensuring that your installation is both legal and safe.
- Enhanced Chimney Support: By providing a secure interface for the flue liner, this top plate plays a key role in preventing structural dislocations and potential hazards. This is especially important for homeowners and installers who prioritise long-term durability.
Installation Guidelines
Pre-Installation Checks
- Structural Integrity: Before installation, confirm that your masonry chimney is fully weatherproofed and free from structural defects.
- Correct Accessories: Ensure that you have the necessary complementary components, specifically the Top Clamp and Top Insert Sleeve, which are designed to work seamlessly with the Top Plate Ø 300.
Step-by-Step Installation
1. Prepare the Chimney Stack: Begin by cleaning the top of the masonry chimney to remove any debris. This step is crucial for a secure installation.
2. Position the Top Plate: Carefully place the Top Plate Ø 300 on the chimney cap. Ensure that it is aligned correctly to distribute the weight of the flue liner evenly.
3. Attach Supporting Components: Secure the Top Clamp and Top Insert Sleeve according to the manufacturer’s instructions. These accessories are fundamental to ensuring the stability of the setup.
4. Final Inspections: Once installed, double-check that all components are firmly in place and no movements are possible. Regular maintenance, including bi-annual chimney sweeping, is recommended to maintain peak performance.
Maintenance and Aftercare
Keeping your chimney in optimal condition is essential for safety and efficiency. Regular inspections and cleaning by a qualified professional will help prevent any potential issues and extend the lifespan of your chimney accessories. Avoid aggressive cleaning agents and tools that could damage the stainless components of your system.
Selecting the Right Accessories
When setting up or upgrading your chimney system, it is crucial to choose accessories that work in harmony. The Top Plate Ø 300 stands out due to its high-quality build and strict compliance with safety regulations. Complement it with other MI-FLEX accessories to create a cohesive, secure system. Look for products that offer durability, compatibility with multiple fuel types, and robust support structures—as these qualities ensure you are well-covered in terms of performance and safety.
Addressing Common Objections
Durability Concerns
Some installers might worry about the longevity of chimney accessories under high-temperature conditions. The Top Plate Ø 300 is designed to safely withstand temperatures up to 600°C, making it an excellent investment for long-term use.
Installation Complexity
While chimney installations can appear daunting, the Top Plate Ø 300 has been engineered for straightforward integration. Comprehensive manufacturer guidelines and compatibility with other MI-FLEX components simplify the installation process. Professional assistance is always available should you require further support.
Compliance and Safety
Building Regulations are strict for a reason. The Top Plate Ø 300 meets these stringent standards, ensuring that every installation is not only compliant but also prioritises the safety of your household. The peace of mind that comes from knowing your chimney system adheres to national standards is invaluable.
Final Thoughts
The Top Plate Ø 300 represents a smart investment in the safety and effectiveness of your chimney system. It is engineered to deliver reliable support under the most challenging conditions, ensuring that your flue liner remains secure and your heating system operates efficiently. From its robust construction and high temperature tolerance to its versatile fuel compatibility, this top plate is designed for both immediate performance and long-term durability. If you are looking for an accessory that delivers on every promise—from safety and reliability to compliance and ease of installation—the Top Plate Ø 300 is the clear choice.
For those who value quality and want to ensure every component of their chimney system is dependable, this is the accessory that completes the picture. The blend of engineering precision and stringent safety standards makes it ideally suited for both retail and trade installations.
Boldly invest in the performance and security of your home—this is the accessory that makes a real difference. Its design supports not only the flue liner’s weight but also the general safety of your installation, reducing potential risks and ensuring optimal operation throughout the lifespan of your system.
Ultimately, by choosing the Top Plate Ø 300, you are making a decision that integrates reliability, durability, and efficiency into one revolutionary product. Enjoy the reassurance that comes with a product designed to offer outstanding support while meeting the needs of modern heating requirements. Every detail has been meticulously considered to provide not just a product, but a solution that complements and enhances your overall chimney system.
Buy now or call 01670 206 999.
Take the definitive step for a safer, more reliable chimney system by ordering our Top Plate Ø 300 today!
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