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Pack 505 - (125mm, P/C/N/CNP/20-100-MR/RC) (20-125-P505)

National Flues proudly presents the premium Pack 505, an essential Rain Cap Installation Kit engineered for MI-FLEX flue liners and versatile multi-fuel installations. Ideal for chimneys requiring comprehensive sealing and protection, the Pack 505 is celebrated for its 100mm to 125mm MR flex adaptor, robust 316L stainless steel construction, and high-temperature performance of up to 600°C. This installation kit is a top choice for tradespeople and retail customers looking for reliable, compliant Read more...
Pack 505 - (125mm, P/C/N/CNP/20-100-MR/RC)
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The price you pay today £86.99
Give us a call if you find it cheaper and we'll normally price match.

 

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At a Glance

    Comprehensive kit including Top Plate, Top Clamp, Nose Cone, Increasing Adaptor (Ø 100mm to 125mm), Chimney Notice Plate and Rain Cap
    Specifically designed for MI-FLEX 316 and 904 flexible flue liners
    Suitable for a range of fuels: wood (under 20% moisture), oil, gas and smokeless coal
    Withstands high temperatures up to 600°C (T600 designation)
    Constructed from durable 316L stainless steel with a natural finish
    Fully compliant with Building Regulations Document J
    HETAS and CE approved for assured quality and safety
    Ideal for installations both with an existing chimney pot and when one is not present
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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.

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

Pack 505 is your all-inclusive Rain Cap Installation Kit, perfectly crafted for use with MI-FLEX 316 and 904 flexible flue liners. This essential pack is designed to comply with Building Regulations Document J, ensuring your installation remains completely enclosed inside a masonry chimney. The kit thrives under high temperatures up to 600°C (T600 designation) and is ideal for wood with less than 20% moisture, smokeless coal, as well as gas and oil appliances.

The installation kit includes:1 x Top Plate - Ø 125mm1 x Top Clamp - Ø 125mm1 x Nose Cone - Ø 125mm1 x Increasing Adaptor to Black Pipe or Single Wall Flue - Ø 100mm SW to Ø 125mm Flex1 x Chimney Notice Plate1 x Rain Cap - Ø 125mmEnsure your installation is straightforward and fully equipped for various scenarios, including those without an existing chimney pot. Remember, regular maintenance such as sweeping should be carried out at least once a year, preferably by a competent person as listed on HETAS. Keep your system efficient and safe by avoiding chemical cleaners and mild steel tools during maintenance.

SKU: 20-125-P505

Technical Specifications
SKU20-125-P505
ModelInstallation Pack No 505
Compatible Flue LinersMI-FLEX 316 and 904
Sizeu00d8 125mm for top plate, top clamp and nose cone; u00d8 100mm to 125mm increasing adaptor
Material316L Stainless Steel
ColourNatural / Stainless Steel
Temperature RatingUp to 600u00b0C (T600 designation)
FuelsWood (less than 20% moisture), Oil, Gas, Smokeless coal
CertificationsHETAS, CE
ComponentsTop Plate, Top Clamp, Nose Cone, Increasing Adaptor, Chimney Notice Plate, Rain Cap
Before starting installation, ensure that all components in the Pack 505 kit are present and undamaged. Begin by positioning the Top Plate securely on your chimney structure, followed by attaching the Top Clamp to hold the plate in place. Next, install the Nose Cone carefully, ensuring it aligns with the Top Plate. Fit the Increasing Adaptor between the black pipe or single wall flue and the flue liner, verifying a snug and secure connection between the Ø 100mm and Ø 125mm parts. Affix the Chimney Notice Plate where required to meet Building Regulations Document J, and then complete the installation with the Rain Cap, which is critical for protecting the installation from rain ingress. Always work in accordance with the latest UK building guidelines, and if in doubt, consult a HETAS-registered professional. Additionally, remember to maintain a routine chimney sweep at least once annually – more frequently for solid fuel appliances – using tools and cleaning methods recommended by the manufacturer. Avoid chemical cleaners and the use of mild steel tools, which can compromise the integrity of the stainless steel components.

Pack 505 includes a Top Plate (Ø 125mm), Top Clamp (Ø 125mm), Nose Cone (Ø 125mm), Increasing Adaptor (Ø 100mm to Ø 125mm), Chimney Notice Plate, and a Rain Cap (Ø 125mm).

Pack 505 is specifically designed to work with MI-FLEX 316 and 904 flexible flue liners, ensuring a comprehensive and secure installation.

Pack 505 supports installations for wood with less than 20% moisture, smokeless coal, gas, and oil appliances.

The kit is suitable for appliances with operating temperatures up to 600°C (T600 designation).

It is recommended to sweep and inspect your chimney system at least once annually. For solid fuel appliances, sweeping should occur at least twice yearly: once at the end of the heating season and once at the start of the next.

Yes, sweeping is crucial to ensure your system runs efficiently and safely. It should be carried out by a competent person, preferably from the HETAS register.

No, chemical cleaners and mild steel tools should not be used as they could damage the stainless steel chimney. Stick to recommended cleaning methods to preserve the integrity of your setup.
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