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Sump Adaptor (325mm sq. plate) - Ø 125 (28-5-SA)

The Sump Adaptor (325mm sq. plate) - Ø 125 from National Flues is a premium, high-performance chimney connection solution. Made from 316 Stainless Steel, this revolutionary adaptor ensures a secure, long-lasting connection between a clay pot and a chimney stack. Ideal for installations where a traditional chimney flue liner is not required, this adaptor significantly enhances the reliability of your chimney system. Whether you're upgrading an existing setup or installing a new one, our quality p Read more...
The price you pay today £46.99
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At a Glance

    Crafted from 316 Stainless Steel for ultimate durability
    1mm thick robust construction
    325mm square plate design for a stable fit
    Designed specifically for clay pot to chimney stack connections without a flue liner
    Ensures secure, smoke-tested installation for optimal performance
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.

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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]

The Sump Adaptor (325mm sq. plate) - Ø 125 is designed specifically for secure and efficient clay pot to chimney stack connections where a chimney flue liner isn't installed. Crafted from durable 1mm thick stainless steel grade 316, this adaptor ensures longevity and reliability.

Prior to installation, ensure your existing clay liner is smoke-tested for soundness. For a perfect fit, simply place the 325mm x 325mm stainless steel plate against the underside of the stack, mark and secure it with screws, fill in the gaps with Fire Cement and Fire Rope for a seal that's good as gold. The single wall pipe then fits snugly over the downwards facing spigot, finalising your connection with additional fireproof materials.

SKU: 28-5-SA

Technical Specifications
Material316 Stainless Steel
Plate Dimensions325mm x 325mm
Pipe SizeØ 125
Plate Thickness1mm
Stock AvailabilityIN STOCK (79)
Before installation, ensure that your existing clay liner is thoroughly smoke tested to confirm its integrity. Begin by positioning the 325mm x 325mm adaptor plate against the underside of your chimney stack and mark the drilling points. Secure the plate using appropriate screws; then, meticulously fill any gaps with Fire Cement and use Fire Rope to achieve a seamless, fireproof seal. Once the plate is in place, fit the single wall pipe over the downward facing spigot, applying additional fireproof materials to complete the connection. Follow all manufacturer safety guidelines and consider consulting National Flues support if you have any uncertainties during the process.

The Sump Adaptor is used to connect the bottom of a chimney stack that has an existing clay liner, ensuring a secure fit without the need for a chimney flue liner.

The Sump Adaptor is made from 1mm thick stainless steel Grade 316, offering excellent durability and resistance to corrosion.

Place the adaptor's plate against the underside of the stack, mark, drill, and screw it securely. Seal the connection with Fire Cement and Fire Rope, and then fit the single wall pipe over the spigot, finishing the seal with more fireproof materials.

Yes, it's essential to perform a smoke test to ensure the existing clay liner is in good condition before installation of the Sump Adaptor.

The adaptor is specifically designed for use with chimney stacks that have a sound clay liner installed and do not require a chimney flue liner.

The square plate measures 325mm x 325mm, providing a substantial base for secure installation.

Use Fire Cement and Fire Rope around the adaptor plate and the connection to the single wall pipe to create a tight, secure seal.

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