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Pack 708 - (175mm, PHCMT/N/CNP/20-150-MR) (20-180-P708)

Discover the ultimate Pack 708 installation kit from National Flues—a premium solution designed specifically for 175mm flue liners. Engineered for MI-FLEX 316L and 904 systems, this comprehensive kit, featuring a terracotta pot hanging cowl, nose cone, and transition adaptor, provides the perfect balance of safety, performance, and aesthetics. Ideal for a range of fuel types including wood, oil, gas, and smokeless coal, Pack 708 ensures your chimney system complies with Building Regulations. Enh Read more...
The price you pay today £162.99
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At a Glance

    Complete installation kit for 175mm flue liners
    Includes terracotta pot hanging cowl with mesh, nose cone, increasing adaptor (150mm SW to 180mm Flex) and chimney notice plate
    Engineered for MI-FLEX 316L and 904 systems
    Complies with Building Regulations Document J for safe, robust installations
    Suitable for wood (with less than 20% moisture), oil, gas and smokeless coal
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We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, July 1st. This is based on current delivery times for this product. Delivery for products not in our warehouses can be delayed because of third party carriers. 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. We can sometimes reduce longer lead times if we pay the carrier £25 for express delivery. Visit our Shipping Information page for more information.

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

Introducing Pack 708, a premium installation kit designed specifically for 175mm flue liners. This comprehensive package includes a terracotta pot hanging cowl with mesh, a nose cone, an increasing adaptor to connect your black pipe or single wall flue, and a chimney notice plate. Perfectly engineered for use with MI-FLEX 316 and 904 flexible flue liners, these components come together to create a full chimney system compliant with Building Regulations Document J.

Ideal for use on appliances up to 600°C, this kit is suitable for wood (less than 20% moisture), smokeless coal, gas, and oil. Ensure your chimney system is designed for easy sweeping and maintenance, and remember that regular servicing by a competent person is essential. For solid fuel applications, we recommend HETAS registered sweeps for optimal results.

SKU: 20-180-P708

Technical Specifications
Flue Diameter175mm
Adaptor Dimensions150mm to 180mm transition
Material316L
Colour FinishTerracotta
Temperature RatingUp to 600u00b0C
Fuel CompatibilityWood (<20% moisture), Oil, Gas, Smokeless Coal
ApprovalsHETAS, CE
System CompatibilityMI-FLEX 316 & 904
Pack 708 is designed for retrofitting without the need to remove your existing chimney pot. Carefully follow the provided installation manual to ensure that the terracotta pot hanging cowl, nose cone, adaptor, and notice plate are correctly positioned. Always verify that the flexible flue liner is fully enclosed within a masonry chimney, as required by Building Regulations Document J. For solid fuel systems, scheduling regular inspections and sweeping by a HETAS registered professional is essential to maintain safety and efficiency. Exercise caution during installation and refer to our detailed guidelines for any optional accessories that may further complement your system.

Pack 708 includes a terracotta pot hanging cowl with mesh (Ø 180mm), a nose cone (Ø 180mm), an increasing adaptor for black pipe or single wall flue (150mm SW to 180mm Flex), and a chimney notice plate.

Yes, the components in Pack 708 are suitable for use with wood (less than 20% moisture), smokeless coal, gas, and oil.

No, Pack 708 is designed for scenarios where you do not want to remove your existing chimney pot.

Yes, all parts are specifically designed to work seamlessly with MI-FLEX 316 and 904 flexible flue liners.

Regular cleaning and inspection are essential. For solid fuel applications, sweep your chimney at least twice a year. Avoid chemical cleaners and mild steel tools; always use a HETAS registered sweep.

The components can withstand temperatures up to 600°C (T600 designation).

No, Building Regulations Document J mandates that flexible flue liners must be completely enclosed within a masonry chimney.

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