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Top Insert Sleeve - Ø 200 (20-200-PS)

National Flues presents the Top Insert Sleeve - Ø 200, a premium chimney accessory engineered for flexible flue liner systems. Crafted from high-grade 316L stainless steel and part of the MI-FLEX Accessories range, this product is designed to support wood, oil, gas, and smokeless coal appliances whi Read More...
£25.99
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At a Glance

    Made from durable 316L stainless steel
    Designed for MI-FLEX 316 and 904 systems
    Supports wood, oil, gas, and smokeless coal appliances
    Withstands temperatures up to 600°C
    Complies with HETAS, CE, and UK Building Regulations Document J
    Integrates seamlessly with Top Plate and Top Clamp accessories

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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.

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

The Top Insert Sleeve - Ø 200 is crafted to provide critical support at the top of your flexible chimney liner, fitting seamlessly within the MI-FLEX 316 and 904 flue liner systems. This installation fitting is crucial for creating a full system chimney and ensures your chimney operates safely and efficiently. Designed for multi-fuel use, it’s suitable for wood, smokeless coal, gas, and oil appliances up to 600°C (T600 designation), provided moisture content in wood is less than 20%.

To comply with Building Regulations Document J, this component must be installed within a masonry chimney. Our Top Insert Sleeve slides effortlessly inside the flexible chimney liner, working in conjunction with the Top Plate and Top Clamp to support the weight without compromising the liner's integrity. Ensure your chimney stack is weatherproof and in good condition before installation.

Regular maintenance, including sweeping by a competent person, is essential to keep your system in top shape. For solid fuel appliances, refer to HETAS registered sweeps and avoid chemical cleaners or mild steel tools to prevent damage.

SKU: 20-200-PS

Technical Specifications
SKU20-200-PS
Product NameTop Insert Sleeve - u00d8 200
Material316L Stainless Steel
DesignationBSEN 1856-2 T600 N1 W V2 L50012 G
SystemMI-FLEX Accessories MF20
Colour FinishNatural / Stainless Steel
FuelsWood (max 20% moisture), Smokeless coal, Gas, Oil
Temperature RatingUp to 600u00b0C
ApprovalsHETAS / CE
Ensure the chimney stack is weatherproof and structurally sound before installation. The Top Insert Sleeve must be installed within a masonry chimney using the accompanying Top Plate and Top Clamp. Prior to fitting, inspect the flexible chimney liner to confirm it is in good condition and properly aligned. For safety and optimal performance, arrange for annual maintenance by a HETAS registered professional. Avoid using chemical cleaners or mild steel tools that could compromise the stainless steel.

It is used to support the top part of a flexible chimney liner, ensuring the weight is managed without compromising the liner's structure.

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

Absolutely, the sleeve complies with Building Regulations Document J, requiring installation inside a masonry chimney.

Ensure the chimney stack is fully weatherproofed, structurally sound, with chimney pots in good condition and proper flaunching at the top.

The chimney system should be cleaned and inspected at least once a year. Solid fuel appliances should have their chimneys swept twice a year—after the heating season and before the next one.

No, chemical cleaners or mild steel tools should not be used on stainless steel chimneys. Use a competent person for sweeping, preferably a HETAS registered sweep.

For solid fuel applications, 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 Wednesday, May 21st. Delivery times of products not in our warehouses depend on product availability and shipping. If you need a definitive delivery time give us a call. If you need faster stove or fireplace delivery please also give us a call. 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. 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 Insert Sleeve - Ø 200 buyers guide

Order now your Top Insert Sleeve - Ø 200 and secure optimal chimney safety.

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