👀 3 people are viewing this product
× National Flues
Free Delivery on Orders £100+
100% 5* reviewed on Trustpilot
Free stove flue design service
Delivery to mainland UK
Call for help on 01670 206999

Pack 704 - (175mm, P/C/PS/N/CNP/20-150-MR) (20-180-P704)

National Flues introduces Pack 704, an essential pot replacement kit designed for seamless, compliant flue liner installations. This MI-FLEX compatible kit, featuring a 150mm to 180mm MR flex adaptor, offers a complete solution perfect for chimney renovations and new installations alike.
The price you pay today £179.99
including free delivery Give us a call if you find it cheaper and we'll normally price match.

 

Payment Options

At a Glance

    Comprehensive kit including top plate, top clamp, nose cone, increasing adaptor, and chimney notice plate
    Compatible with MI-FLEX 316 and 904 flexible flue liners
    Designed for multi-fuel use (wood [<20% moisture], smokeless coal, gas, oil)
    Engineered from durable 316L stainless steel with a natural finish
    Fully compliant with Building Regulations Document J for masonry chimneys
Delivery Information +

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.

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.

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.

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]

Pack 704 is your comprehensive pot replacement kit specifically designed to work with MI-FLEX 316 and 904 flexible flue liners. Perfectly designed for multi-fuel usage, these accessories ensure a secure and compliant fitting within masonry chimneys. The pack includes a top plate, top clamp, nose cone, increasing adaptor, and a chimney notice plate, offering all you need for an effective flue liner installation.

Suitable for appliances up to 600°C, this kit supports wood with less than 20% moisture, smokeless coal, gas, and oil. The system demands a masonry chimney for safe installation, meeting all Building Regulations Document J requirements. Additional components like a chimney cowl or terminal may be necessary to provide weather and bird protection.

SKU: 20-180-P704

Technical Specifications
SKU20-180-P704
Product NamePack 704 - Pot Replacement Kit with 150mm to 180mm MR Flex Adaptor
Material316L Stainless Steel
Colour FinishNatural / Stainless Steel
Temperature RatingUp to 600u00b0C
Compatible FuelsWood (<20% moisture), Smokeless Coal, Gas, Oil
SystemMI-FLEX Accessories MF20
CertificationsHETAS / CE
Components IncludedTop Plate, Top Clamp, Nose Cone, Increasing Adaptor, Chimney Notice Plate
Pack 704 is engineered exclusively for use in masonry chimneys. Prior to installation, ensure your chimney is fully enclosed in accordance with Building Regulations Document J. Follow these steps: verify precise measurements, confirm all components are present, and adhere strictly to the provided installation guidelines for MI-FLEX systems. Additional components such as a chimney cowl or terminal may be required for optimal weatherproofing and bird protection. If in doubt, consult a professional chimney sweep or installer.

Pack 704 includes a 180mm top plate, 180mm top clamp, 180mm nose cone, an increasing adaptor (150mm SW to 180mm Flex), and a chimney notice plate.

Yes, it's suitable for wood with less than 20% moisture, smokeless coal, gas, and oil appliances, supporting temperatures up to 600°C.

No, Building Regulations Document J dictates that flexible flue liners must be fully enclosed within a masonry chimney. Non-masonry enclosures like timber or plasterboard are not acceptable.

The increasing adaptor helps transition from a 150mm single wall to a 180mm flexible liner, ensuring a secure and efficient connection.

While not included, a chimney cowl or terminal is recommended to offer weather and bird protection for your chimney.

It's recommended to sweep solid fuel chimneys twice a year: once at the end of the heating season and once before the next season begins. Annual inspections and maintenance of the appliance are also advised.

For solid fuel applications, you can find a list of HETAS registered chimney sweeps at www.hetas.co.uk.

Your recently viewed products:

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