Twin wall stainless steel flexible flue liner and accessories

Fireflexmaster is a high performance twin-walled flexible flue liner designed and approved for use with all fuels including gas, oil and approved solid fuels.

  • Triple Lock Joint System

    links inner and outer liner walls to provide strength and stability

  • Lifetime warranty

    will see any faulty liners replaced during the appliance’s lifetime – subject to terms and conditions

Technical details

Fuel typeGas, oil and approved solid fuels
Diameter range:100mm, 125mm, 150mm, 175mm, 200mm
Inner liner and outer casing material0.11mm grade 316L stainless steel
Inner liner and outer casing material0.11mm grade 904L stainless steel
Joint methodTriple lock joint system
DesignationsBS EN 1856-2 T600 N1 D VmL50022 G
BS EN 1856-2 T600 N1 W VmL50022 G
BS EN 1856-2 T600 N1 D VmL70022 G
BS EN 1856-2 T600 N1 W VmL70022 G
CE approvedYes
Maximum operating temperature600°C negative pressure

How do I register for Lifetime Warranty?

All Fireflexmaster liners will now have a standard LIFETIME WARRANTY. Warranty registrations are now automatic, you don’t need to complete any complicated forms. Your invoice confirms you purchased the liner from Docherty Group and a copy is required when requesting warranty service.

If you have misplaced your invoice, you can easily print a copy from your web shop account by accessing “My Account” and locating the order under “My orders”.

Did Fireflexmaster’s warranty coverage change recently?

Yes, Fireflexmaster’s warranty terms changed in 2017. The coverage types are as follows:

Flexible flue liners purchased before 31 December 2016 are covered by the following warranty:

  • 10 years conditional warranty for Fireflexmaster 316 liner
  • 20 years conditional warranty for Fireflexmaster 904liner

Flexible flue liners purchased after 1 January 2017 received an automatic Lifetime Warranty. No warranty registration is required.

How to claim Warranty Service

Contact your local Docherty branch quoting your original order number or invoice number

Request a quote