Mi Flues MI-FLEX FastFix-Screw Adaptor to SW - Ø125

The MI-FLEX FastFix-Screw Adaptor to Single Wall – Ø125mm is a specialist chimney fitting designed to create a secure transition between a 125mm rigid single wall connecting flue and MI-FLEX flexible flue liner of the same nominal diameter. Manufactured from 0.6mm thick 316 stainless steel, it provides a durable connection for compatible chimney relining installations.

Part of the MI-FLEX FastFix-Screw accessory range, this adaptor is designed for use with both MI-FLEX 316 and 904 flexible flue liners. Suitable for appliances operating at temperatures up to 600°C (T600), it is particularly suited to wood burning and multi-fuel chimney installations.

Features & Benefits

FastFix-Screw Connection

Part of the FastFix-Screw family of screw-on installation fittings, designed specifically to simplify connections to compatible MI-FLEX 316 and 904 flexible flue liners.

Single Wall to Flexible Liner Transition

Provides the transitional joint between a rigid single wall connecting flue system and MI-FLEX flexible flue liner, with both components using the same nominal diameter.

316 Stainless Steel Construction

Manufactured from 0.6mm thick 316 stainless steel, providing excellent durability and corrosion resistance within demanding chimney environments.

Suitable for T600 Applications

Designed for suitable appliances operating at temperatures up to 600°C, providing dependable performance in high-temperature chimney applications.

Compatible with Ø125mm MI-FLEX

Specifically designed for 125mm diameter single wall flue and MI-FLEX flexible liner systems, providing a purpose-made transition between the two components.

Designed for Compliant Chimney Relining

Allows the transition from connecting flue to flexible liner to take place within the existing masonry chimney, helping create a neat and correctly configured installation.

Product Overview

The MI-FLEX FastFix-Screw Adaptor to SW – Ø125mm is a bottom fixing used where a rigid single wall connecting flue needs to transition into a 125mm MI-FLEX flexible flue liner.

The adaptor is manufactured from 0.6mm 316 stainless steel and is designed to work with both MI-FLEX 316 and 904 liner systems. Its FastFix-Screw design provides a practical method of connecting the flexible liner to the adaptor as part of a complete chimney relining system.

Under Building Regulations Document J, flexible flue liner must be completely enclosed within an existing masonry chimney. The connection between the single wall flue and flexible liner should therefore be made within the confines of the masonry chimney, with no flexible liner left exposed.

Appropriate provision must also be made to securely connect the adaptor to both the rigid connecting flue below and flexible liner above, creating a suitable gas-tight joint.

Technical Specifications

• Product Type: FastFix-Screw Adaptor to Single Wall
• Nominal Diameter: Ø125mm
• Material: 316 Stainless Steel
• Material Thickness: 0.6mm
• Flexible Liner Compatibility: MI-FLEX 316 & MI-FLEX 904
• Connection: Single Wall Flue to Flexible Flue Liner
• Temperature Designation: T600
• Maximum Appliance Temperature: 600°C
• Application: Bottom Fixing / Transitional Joint
• Installation Location: Within Existing Masonry Chimney

Installation Information

• Designed to connect a Ø125mm rigid single wall flue to Ø125mm MI-FLEX flexible liner.
• Compatible with MI-FLEX 316 and 904 flexible flue liners.
• The connection to the flexible liner must be made within the confines of the existing masonry chimney.
• Flexible flue liner should not remain exposed outside the masonry chimney.
• The adaptor must be securely connected to both the single wall flue below and flexible liner above.
• A suitable gas-tight seal must be created at the connections.
• Appropriate fire cement, ceramic rope, ceramic tape or high-temperature sealant may be required according to the system manufacturer's installation instructions.
• Installation must comply with Building Regulations Document J and relevant manufacturer guidance.

Maintenance Information

The complete chimney installation should be designed to provide suitable access for inspection, sweeping and ongoing maintenance.

Cleaning and inspection should be carried out by a competent person at least once a year alongside appliance maintenance. Chimneys serving solid fuel appliances may require more frequent sweeping, including cleaning at the end of the heating season to remove accumulated deposits and inspection before the following heating season to check for deposits, blockages or nesting material.

When cleaning stainless steel chimney systems, chemical chimney cleaners and mild steel sweeping tools should not be used, as these may damage the stainless steel components.

Key Features

• T600 designation
• Ø125mm nominal diameter
• Designed as a bottom fixing
• FastFix-Screw connection system
• Robust 0.6mm material thickness
• Suitable for appliances up to 600°C
• Manufactured from 316 stainless steel
• Connects rigid single wall flue to flexible liner
• Compatible with MI-FLEX 316 flexible flue liner
• Compatible with MI-FLEX 904 flexible flue liner
• Connection positioned within the masonry chimney
• Designed to help create a secure, gas-tight transition
• Suitable for professional chimney relining installations
• Suitable for wood burning and multi-fuel chimney applications
• Designed with ongoing sweeping and maintenance requirements in mind

The MI-FLEX FastFix-Screw Adaptor to Single Wall – Ø125mm provides a durable and purpose-designed transition between rigid connecting flue and MI-FLEX flexible liner, combining 316 stainless steel construction with a practical screw-on connection for secure and professional 125mm chimney relining installations.

Delivery

Gosforth Fire Station offer free delivery on all order overs £100.00 to mainland UK. Unfortunately at this time we are unable to offer free delivery to the following locations. Northern Ireland (not stoves), The Channel Islands, The Isle of Man, The Isle of Wight, and all other Offshore Islands. If you are ordering from one of these locations please proceed with the order and once received a member of the team will be in touch to advise the delivery cost should you wish to go ahead.

Part of the reason why we can keep our prices so low is that we don’t hold huge amounts of stock. Due to this, most orders are ordered in from our suppliers on request. We therefore aim to dispatch orders from our showroom 5-10 days after the order is placed. We are working hard to bring this lead time down

Once the order is placed you will receive an order confirmation with an estimated delivery date.>

Once we are in the position to offer a firm delivery date a member of the team will be in touch to book a convenient delivery day with you.

Large Item delivery Information

Large items such as stoves, fires and outdoor lifestyle products will be delivered by a national pallet delivery service.

These items usually arrive on a large 7.5 tonne truck with a tail lift. If you think access for the delivery vehicle may be an issue please let us know at the time of ordering and we will work with you to find a solution.

The driver is contracted to deliver the item by pallet truck and will therefore be unable to move the item across uneven ground, grass, gravel and narrow openings.

Due to the weight and insurances drivers will not be able to assist with carrying any of the items into your property. It is the responsibility of the customer to prepare a suitable area for the goods to be left before they are taken inside. All goods must be checked while the driver is on site. They are obliged to wait with you for up to 15 minutes while you carry out these checks.

If the driver refuses to wait please mark the goods as “damaged”. On the rare occasion that the goods are damaged please mark the delivery note as “damaged” and refuse the delivery. Please take photos of the damage and contact a member of the team as soon as possible to report the damage. Damages must be reported within 24 hours of the delivery taking place.

Failed Deliveries

If for any reason you are not in when the delivery arrives on the pre-arranged delivery day a re-delivery charge will be payable.

Unfortunately if an order is cancelled after it has been dispatched, even If it has not yet reached you, the cost of the return delivery to us will be taken from the refund amount.

Smaller item delivery/strong>

Smaller items such as barbecue / fireside accessories will usually be delivered by DPD. They will contact you directly by email and text message to advise of the delivery day and time.

For larger items on the national pallet service deliveries take place Monday-Friday 9am-5pm.

Smaller items delivered by courier can be delivered Monday - Sunday.

Collections

Collections are Tuesday – Saturday 10am-4pm from our Gosforth Showroom and must be pre-arranged.

Returns

Our returns policy is simple and aims to make things as smooth as possible should you wish to return an item. You have the right to cancel any order from the time of placing the order up to 14 days after delivery. Cancellations must be submitted in writing either by post or email to online@gosforthfirestation.co.uk, quoting your order number which appears on the invoice/receipt.

Under the Consumer Contracts Regulations 2014, you have the right to receive a refund within 14 working days of cancellation. We normally pay refunds within 7 working days of cancellation or when goods have been returned safely (whichever is the latter). You are advised to retain the packaging. You will find it difficult to return the item without appropriate packaging.

The goods must not have been fitted, installed or used in any way and must be unmarked and free from blemishes of any kind.  You must return them in a saleable condition. All spare parts and painted appliances are non-returnable and non-refundable due to being a bespoke order. The cost of returning the item to us is your responsibility.

Gosforth Fire Station reserves the right to charge a restocking fee for all goods brought into stock and subsequently cancelled by the customer. This charge will be based on our cost to return the items to the supplier.

Gosforth Fire Station reserve the right to cancel an order if a product is unavailable or any pricing errors occur.

PayPal Pay in 3

What is PayPal Pay in 3?

PayPal Pay in 3 is an interest-free loan that lets you split your basket into 3 payments, with the first due at time of purchase and subsequent payments due every month on the same date. It’s a great way to spread the cost of larger items or to cover emergencies, and is a helpful tool to manage your budget more effectively. Please note that Pay in 3 is a form of credit, so carefully consider whether you can afford the repayments and be aware of the possible impact of missing payments, including making other borrowing more difficult or more expensive.

We’re offering PayPal Pay in 3 to a growing number of our UK customers.

PayPal Pay in 3 is not available for certain merchants and goods. We may also decide not to offer PayPal Pay in 3 as a payment option in certain circumstances, such as where our checks suggest an increased risk of fraud or where data we hold suggests you may not be eligible. The checks we run are with an external credit reference agency. This search will only be visible to you and will not affect your credit score.

Will I be able to use PayPal Pay in 3?

If you choose PayPal Pay in 3 as your payment method when you check out with PayPal, you’ll be taken through the application process. You’ll get a decision instantly, but not everyone is approved based on the checks we carry out.

How long will my PayPal Pay in 3 plan last?

Your plan will last 2 months in total. The first payment will be due at the time of purchase, followed by 2 further payments due each month after that.

What information do I need to apply for PayPal Pay in 3?

To apply for PayPal Pay in 3, you’ll need to provide your:

• Title
• Phone number
• Address
• Date of birth
• Payment details

How is my application for PayPal Pay in 3 assessed?

Our decision making process is automated. We assess your financial position using a combination of the information you provided within your application, and information about your usage and history with PayPal to decide whether PayPal Pay in 3 is suitable for you at this time. We may also run a “soft” credit check with an external credit reference agency when you apply if we need more information to make our decision. This search will only be visible to you and will not affect your credit score.

Are there any fees associated with PayPal Pay in 3?

There are no fees for choosing to pay with PayPal Pay in 3.

Can I opt out from seeing PayPal in 3 at checkout?

We know some customers may prefer not to see the Pay in 3 funding option within the PayPal checkout. If this includes you, you can contact us and ask us to change your account settings so that Pay in 3 is not shown. If you wanted to change this at a later date, you can contact us and we can change your settings to show Pay in 3 again.

We know that customers may choose to take this action for a variety of reasons. However, if you need further financial help and support, please check the FAQ below titled “Where else can I go for financial help and support?