Product Description

316 Stainless Steel Flue Liner Kit 3 – 5 Inch 125mm

Model: 316/316 Flue Liner Kit 3, 5 Inch

The 316 Stainless Steel Flue Liner Kit 3 contains the main parts needed to reline a suitable masonry chimney. It includes your chosen continuous liner length, an anti-downdraught pot hanger, a nose cone, an ID plate and an equal vitreous-to-liner adaptor.

The flexible liner has a 125mm (5-inch) internal diameter. Both skins use 316L-grade stainless steel. Therefore, this practical kit suits many standard domestic stove and heating installations.

The included anti-downdraught pot hanger supports the liner from a suitable terracotta chimney pot. Its design also helps reduce problems caused by wind blowing down the chimney.

This liner can form part of a suitable chimney system for compatible appliances that burn dry wood, gas, oil, cured dry peat or approved low-sulphur fuel. However, your installer must confirm the correct diameter, fuel and installation method before you order.

Important: We cut the flexible liner to the length you select. Therefore, you cannot return it after we cut or order it. Please check the required diameter and length carefully before completing your purchase.

What Is Included in Flue Liner Kit 3

• Your chosen continuous length of 125mm (5-inch) 316/316 flexible flue liner
• 1 x flue liner nose cone
• 1 x chimney identification plate
• 1 x terracotta anti-downdraught pot hanger cowl
• 1 x 125mm equal vitreous-enamel pipe-to-flue-liner adaptor

We supply the liner as one continuous length. For example, if you order ten metres, you will receive one ten-metre liner. You will not receive ten separate one-metre sections.

Key Features

• 125mm (5-inch) internal flue diameter
• 316L stainless-steel inner and outer skins
• Double-skinned flexible construction
• Designed for relining a suitable masonry chimney
• Smooth inner skin helps flue gases flow upwards
• Flexible outer skin helps with chimney installation
• Four-fold Quattro-lock seam
• Includes an anti-downdraught pot hanger cowl
• Helps reduce wind-driven downdraught
• Includes an equal vitreous-to-liner adaptor
• HETAS-listed flexible flue liner
• Classification: EN 1856-2 T450 N1 D V3 L50012 G

Why Choose Flue Liner Kit 3

Kit 3 offers a useful solution when an installation needs a pot hanger with added downdraught protection. It combines the main liner parts in one package, which makes product selection easier.

The anti-downdraught pot hanger sits on a suitable terracotta chimney pot. It supports the liner while also forming the chimney terminal. In addition, its fixed design helps reduce the effect of wind entering the chimney.

The included equal adaptor connects the flexible liner to compatible 125mm vitreous-enamel stove pipe. Meanwhile, the nose cone helps guide the liner through the chimney during installation.

What Is the Difference Between Kit 2 and Kit 3

Both kits include a flexible liner, nose cone, chimney ID plate, pot hanger and vitreous adaptor. However, the design of the pot hanger differs.

Kit 2 includes a standard terracotta pot hanger cowl. It suits installations where the chimney does not need added downdraught protection.

Kit 3 includes a terracotta anti-downdraught pot hanger. Therefore, it may offer a better choice for exposed properties or chimneys that suffer from wind-related downdraught.

An anti-downdraught cowl cannot solve every chimney problem. Ask a qualified installer or chimney specialist to find the cause of poor draught before choosing a terminal.

316 Flue Liner Construction

• Inner skin material: 316L-grade stainless steel
• Outer skin material: 316L-grade stainless steel
• Inner skin thickness: 0.12mm
• Outer skin thickness: 0.12mm
• Internal diameter: 125mm
• Imperial diameter: 5 inches
• Construction: double skinned
• Seam type: four-fold Quattro-lock seal
• Classification: EN 1856-2 T450 N1 D V3 L50012 G

The smoother inner skin helps combustion gases move through the liner. Meanwhile, the ribbed outer skin gives the liner enough flexibility to pass through a suitable masonry chimney.

The manufacturer creates the liner from a continuous strip of stainless steel. It then folds the seam across four layers to form a strong Quattro-lock joint.

Suitable Fuels and Appliances

Depending on the appliance and full chimney design, this 316L liner can suit compatible systems that use:

• Seasoned dry wood
• Approved low-sulphur fuel
• Cured dry peat
• Oil
• Gas
• Not Coal

Always check the appliance instructions before choosing the liner. You should also burn only clean, dry and approved fuel.

Is a 125mm Flue Liner Suitable for Your Stove?

A 125mm liner may suit an appliance that has approval for a 125mm flue. However, not every wood-burning or multifuel stove can use this diameter.

Do not choose the liner size from the stove outlet alone. Instead, check the appliance instructions and ask your installer to confirm the required diameter.

If the appliance does not have approval for a 125mm flue, the installation may need a 150mm liner. Your installer should check the appliance, fireplace opening and complete chimney design.

About the Anti-Downdraught Pot Hanger

The included anti-downdraught pot hanger fits onto a suitable terracotta chimney pot. It supports the flexible liner at the top of the chimney and provides a weather-resistant terminal.

The cowl has no powered parts. Instead, its fixed shape helps shield the chimney outlet from changing wind directions. It also includes a guard to help stop birds and larger debris from entering the flue.

Your installer must check the chimney pot before fitting the hanger. The pot must remain sound, secure and suitable for the fixing method. A damaged or loose pot may need repair or replacement.

Approval and Classification

• HETAS-listed flexible flue liner
• Classification: EN 1856-2 T450 N1 D V3 L50012 G
• Suitable for installation inside a compatible masonry chimney
• 125mm nominal internal diameter
• 316L stainless-steel inner and outer skins

The classification above covers the flexible liner. Other kit parts may have different ratings or fitting rules. Therefore, your installer must check the complete chimney system before starting work.

Before Installing the Flue Liner

• Confirm that the appliance can use a 125mm liner
• Measure the full chimney route carefully
• Allow enough liner for the top and bottom connections
• Check that the liner can pass through the chimney
• Sweep the chimney before installation
• Check the chimney for damage or blockages
• Make sure the terracotta chimney pot remains sound and secure
• Check that the anti-downdraught cowl suits the property
• Read the appliance and liner instructions
• Use a suitably qualified installer

Flue Liner Installation

The installer will normally feed the flexible liner down from the top of the chimney. The arrows printed on the liner must point upwards. These arrows show the correct direction for the flue gases.

First, attach the supplied nose cone to the leading end of the liner. Next, connect a suitable pulling rope to the nose cone. One person can then guide the liner from the top while another person gently pulls it through the chimney.

Never force the liner through a blockage. Also, do not crush, twist or sharply fold it because this may damage its inner seam.

Once the liner reaches the correct position, the installer can fit the pot hanger, ID plate and lower adaptor. A qualified installer should complete the full installation. Where required, use a HETAS-registered installer.

Manufacturer’s Warranty

The 316/316 flexible liner includes a manufacturer’s lifetime warranty, subject to the warranty terms, correct installation, suitable fuel use and regular maintenance.

You must register the liner with the manufacturer to receive the extended warranty. Failure to register may reduce the available warranty to one year.

Register your MI Flues liner warranty online

Keep your proof of purchase after registration. You may also need the installer’s details, installation date, appliance type, fuel, liner diameter and liner length.

Cleaning and Maintenance

Regular chimney sweeping removes soot and other deposits. It also allows the chimney sweep to check the liner and terminal for possible problems.

Sweep the chimney as often as the appliance and fuel require. A chimney that serves a solid-fuel appliance normally needs sweeping at least once each year. However, frequent use may require more regular cleaning.

Only burn clean, dry and approved fuel. Wet wood and unsuitable fuel can create more deposits, reduce performance and shorten the working life of the flue system.

Why Buy Your Flue Liner Kit from SNH Tradecentre?

SNH Tradecentre works closely with MI Flues. Therefore, our team can help you choose a suitable liner size, stainless-steel grade and kit type.

We understand that installers often work to a fixed schedule. For this reason, we work closely with MI Flues to process orders quickly. When stock and ordering times allow, we aim to cut, check and dispatch liner kits on the same working day.

Same-day dispatch depends on stock, order checks and our daily cut-off time. We must also cut each liner to the selected length. Therefore, please order early if you need fast delivery.

• Genuine MI Flues liner and compatible parts
• Liner cut as one continuous length
• Matching 125mm kit components
• Close working relationship with MI Flues
• Same-day dispatch available on qualifying orders
• Helpful advice before you order
• Established UK plumbing and heating merchant
• Trade counter in Birchington, Kent

Important Information Before Ordering

Please check the liner diameter and length before completing your order.

We cut the flexible liner to the length you select. Therefore, you cannot return it after we cut or order it. This does not affect your rights if the product arrives faulty or does not match your order.

Your installer must confirm that the liner, anti-downdraught pot hanger, adaptor and other parts suit the appliance and complete chimney design.