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Pack 703 - (175mm, PHCM/N/CNP/MAE) (20-180-P703)

National Flues presents Pack 703, a superior chimney installation kit designed for both professionals and the diligent DIY enthusiast. This installation pack perfectly complements MI-FLEX flue liners or flexible chimney systems, ensuring efficient, compliant installations. With a robust build and versatile applications, Pack 703 is your go-to solution for chimney system upgrades in residential and commercial settings.
Now only £164.99
including free delivery Give us a call if you find it cheaper and we'll normally price match.

 

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At a Glance

    Fully integrated installation kit designed for MI-FLEX flexible flue liners

    Includes a Stainless Steel Pot Hanging Cowl with Mesh, Nose Cone, Adaptor, and Chimney Notice Plate

    Crafted from durable 316L stainless steel with a natural finish

    Suitable for multi-fuel applications: wood (<20% moisture), oil, gas, and smokeless coal

    Compliant with Building Regulations Document J and approved by HETAS/CE

    Temperature rating up to 600°C for robust, long-term performance

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]

Pack 703 is an essential chimney installation kit, perfectly designed for use with MI-FLEX 316 and 904 flexible flue liners. When combined, these components form a complete chimney system that complies with Building Regulations Document J. This pack is ideal for installations where retaining the existing chimney pot is preferred.

Each kit includes a Stainless Steel Pot Hanging Cowl with Mesh (180mm diameter), a Nose Cone (180mm diameter), an Adaptor to Black Pipe or Single Wall Flue (180mm diameter), and a Chimney Notice Plate. Suitably designed for wood (with less than 20% moisture), smokeless coal, gas, and oil appliances with a temperature rating up to 600°C (T600). Confidence in the long-term performance is backed by the necessity of regular sweeping and maintenance, which should be handled by a competent person, preferably HETAS registered.

SKU: 20-180-P703

Technical Specifications
Diameter180mm
Material316L Stainless Steel
Colour FinishNatural / Stainless Steel
DesignationBSEN 1856-2 T600 N1 W V2 L50012 G
SystemMI-FLEX Accessories MF20
FuelsWood (with less than 20% moisture), Oil, Gas, Smokeless Coal
Temperature RatingUp to 600u00b0C (T600)
ApprovalsHETAS / CE
Before commencing installation, ensure that all components are present and undamaged. Pack 703 is designed exclusively for installations involving MI-FLEX flexible flue liners within a completely enclosed masonry chimney. Always verify that the existing chimney pot is structurally sound before integration. The kit should be assembled as follows: first, attach the Stainless Steel Pot Hanging Cowl with Mesh, ensuring it is securely fixed; next, fit the Nose Cone and the Adaptor to link to the black pipe or single wall flue. Finally, affix the Chimney Notice Plate in a visible location. Installation must be performed by a competent person, ideally a HETAS registered installer. Warning: Non-masonry enclosures such as timber or plasterboard do not comply with Building Regulations Document J. Regular sweeping and maintenance are advised to ensure system safety and longevity.

Pack 703 includes a Stainless Steel Pot Hanging Cowl with Mesh (180mm), a Nose Cone (180mm), an Adaptor to Black Pipe or Single Wall Flue (180mm), and a Chimney Notice Plate.

No, MI-FLEX flexible flue liner is not included in Pack 703. It must be purchased separately.

Pack 703 is suitable for use with wood (less than 20% moisture), smokeless coal, gas, and oil appliances.

Pack 703 is designed to support appliances with temperatures up to 600°C (T600 designation).

No, according to Building Regulations Document J, flexible flue liners can only be installed in a completely enclosed masonry chimney. Non-masonry enclosures such as timber or plasterboard are not acceptable.

The chimney system should be inspected and cleaned at least once a year. For solid fuel applications, it's recommended to sweep the chimney twice a year: once at the end of the heating season to remove deposits and once at the beginning of the next heating season to check for blockages.

Chemical cleaners or mild steel tools should not be used on stainless steel chimneys. Cleaning should be done by a competent person, and ideally by a HETAS registered sweep.

What our experts say!

"The Pack 703 installation kit is a must-have for professionals and DIY enthusiasts alike. It's a reliable, high-quality solution for creating a full chimney system without removing the existing chimney pot. As always, National Flues delivers these top-notch products nationwide, offering unbeatable prices for both retail and trade customers."

Pack 703 is designed for installing a full chimney system using MI-FLEX flexible flue liners while retaining the existing chimney pot.

National Flues is a trusted supplier of fireplaces and flues, catering to both retail and trade customers across the UK. Known for their unbeatable prices and reliable delivery service, National Flues offers secure online payments and dedicated customer support.

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