Product Description

316 Stainless Steel Flue Liner Kit 1 – 5 Inch 125mm

Model: 316/316 Liner Kit 1, 5 Inch

Install a complete flexible chimney-lining system with the 316 Stainless Steel Flue Liner Kit 1 in 125mm. The kit combines a selected continuous length of 316/316 flexible liner with the key components required for a typical chimney installation.

Both liner skins use corrosion-resistant 316L-grade stainless steel. In addition, its flexible, double-skinned construction makes it suitable for relining an existing masonry chimney.

The liner suits compatible appliances burning cured dry wood, gas, oil and approved low-sulphur solid fuel. However, always check the appliance instructions and current Building Regulations before selecting the liner grade and diameter.

What Is Included in Flue Liner Kit 1?

• Selected continuous length of 125mm 316/316 flexible flue liner
• 1 x liner nose cone
• 1 x top clamp
• 1 x top plate
• 1 x chimney identification plate
• 1 x Screw-FIX Rain Cap
• 1 x equal vitreous-enamel pipe-to-flexible-liner adaptor

The kit contains components for a typical installation that uses a top plate, top clamp and Screw-FIX Rain Cap. However, chimney designs vary. Therefore, ask your installer to confirm that Kit 1 contains the correct components for your property.

316 Flue Liner Kit 1 Key Features

• 125mm internal flue diameter
• Also known as a 5-inch flue liner kit
• 316L stainless-steel inner skin
• 316L stainless-steel outer skin
• Double-skinned flexible construction
• Designed for relining suitable masonry chimneys
• Includes key installation and termination components
• Suitable for compatible wood-burning appliances
• Suitable for approved gas and oil installations
• Suitable for approved low-sulphur solid fuel
• Smooth inner surface supports an efficient flue-gas path
• HETAS-listed flexible flue liner
• Manufacturer’s lifetime warranty on the liner, subject to conditions
• Choice of made-to-measure liner lengths

125mm 316 Flue Liner Specification

• Product type: flexible chimney liner installation kit
• Kit type: Kit 1
• Nominal internal diameter: 125mm
• Imperial size: 5 inches
• Inner skin material: 316L-grade stainless steel
• Outer skin material: 316L-grade stainless steel
• Inner skin thickness: 0.12mm
• Outer skin thickness: 0.12mm
• Construction: double skinned
• Seam design: four-plane folded seal
• Application: relining an existing masonry chimney
• Pressure class: N1
• Temperature class: T450
• Declared classification: EN 1856-2 T450 N1 D V3 L50012 G
• Model: 316/316 Liner Kit 1, 5 Inch

Suitable Fuels

• Cured dry logs
• Approved low-sulphur solid fuel
• Gas
• Oil

Always use a fuel permitted by the appliance manufacturer. In addition, avoid wet or unseasoned wood because it can create more soot, tar and corrosive condensate.

If you plan to burn smokeless mineral fuel regularly, consider upgrading to a 904/904 stainless-steel flue liner kit. The higher-grade steel provides greater resistance to corrosive combustion deposits.

Is a 125mm Flue Liner Suitable for My Stove?

A 125mm liner may suit an appliance that has been tested and approved for a 125mm flue. However, many wood-burning appliances and installations require a 150mm liner.

Therefore, always check the appliance instructions, current Building Regulations and HETAS guidance. Never reduce the flue below the size permitted by the appliance manufacturer.

A competent installer should also confirm that the 125mm liner will pass through the complete masonry chimney before you order it.

How Does Kit 1 Terminate the Chimney?

The top plate sits over the chimney opening and helps close the top of the chimney around the liner. Next, the top clamp supports the liner at the correct height.

The inset rain cap then connects to the liner and helps reduce direct rain entry. Meanwhile, the included identification plate records important information about the completed chimney system.

At the bottom, the equal adaptor connects a compatible vitreous-enamel stove pipe to the flexible chimney liner. Always check the connection sizes before installation.

316L Flue Liner Construction

The smooth inner skin uses 0.12mm 316L-grade stainless steel. Meanwhile, the convoluted outer skin also uses 0.12mm 316L stainless steel.

The manufacturer forms the liner from a single strip of stainless steel. It bends the strip through 180 degrees and folds the seam across four planes. As a result, this construction produces a strong yet flexible chimney liner.

Before Installation

• Confirm that 125mm is the correct diameter for the appliance
• Confirm that 316L suits the intended fuel
• Measure the complete chimney route before ordering
• Allow enough liner for the top and bottom connections
• Check that the liner can pass through the chimney
• Consider testing the route with a short 125mm liner section
• Have the chimney swept and inspected
• Check the chimney stack and masonry condition
• Confirm that the Kit 1 terminal arrangement suits the chimney
• Check that every included component has the correct connection size
• Check the direction arrows printed on the liner

Flue Liner Installation Guidance

A suitably competent installer should fit the liner from the top of the chimney. The directional arrows printed on the liner must point upwards in the direction of the flue gases.

1. First, sweep and inspect the existing masonry chimney.
2. Next, confirm that the liner will pass through the complete chimney route.
3. Secure a suitable rope to the included nose cone.
4. Attach the nose cone securely to the bottom end of the liner.
5. Check that the arrows point away from the nose cone and towards the chimney top.
6. Carefully feed the liner down from the top of the chimney.
7. At the same time, a second person should guide the rope from below.
8. Avoid sharp pulling, crushing or twisting the liner.
9. Remove the nose cone when the liner reaches the correct position.
10. Fit the top plate and support the liner with the top clamp.
11. Fit the inset rain cap and complete the lower adaptor connection.
12. Finally, complete the chimney identification plate.

Always follow the manufacturer’s instructions and current Building Regulations. Where appropriate, use a HETAS-registered installer. Gas appliances must be installed by a suitably qualified Gas Safe registered engineer.

Manufacturer’s Lifetime Warranty

The 316/316 flexible flue liner carries a manufacturer’s lifetime warranty, subject to registration and the manufacturer’s terms and conditions.

The warranty applies to the flue liner. Individual kit components may have different warranty terms. Correct installation, approved components, suitable fuel and regular maintenance may also affect the warranty.

To register the warranty, email darren@snhuk.co.uk with the following information:

• Customer’s name and installation address
• Name and address of the HETAS-registered installer
• Installation date
• Appliance make and model
• Fuel type
• Liner grade and diameter
• Installed liner length

You can also complete the MI Flues lifetime warranty registration form.

Cleaning and Maintenance

Arrange regular chimney sweeping and inspection after installation. Chimneys serving solid-fuel appliances should be swept as often as the appliance, fuel and frequency of use require.

However, the chimney should normally be swept at least once each year. Some installations may require more frequent cleaning. Always follow the appliance manufacturer’s instructions and the advice of a qualified chimney professional.

Why Buy from SNH Tradecentre?

SNH Tradecentre is an independent plumbing and heating merchant based in Birchington, Kent. We supply flue products to homeowners, stove installers and trade customers across the UK.

In addition, we work closely with MI Flues to provide product support and process flue-liner orders quickly. This close relationship helps us dispatch many available orders on the same working day when they arrive before the relevant cut-off time.

• Experienced UK plumbing and heating merchant
• Close working relationship with MI Flues
• Fast processing of made-to-measure liner orders
• Same-day dispatch available on many orders, subject to stock and cut-off times
• Complete installation kit
• Help selecting compatible flue components
• Warranty registration support
• Support for homeowners and professional installers
• Secure online ordering

If you need help selecting the correct kit, call SNH Tradecentre on 01843 842727.

Important Information Before Ordering