Topstak Limited

Multiflex 316L

App. Type: Double Skin Flexible Chimney Relining Systems
Certificate Ref: E-C052-2022
Std. Tested to: BS EN 1856-2:2009
Flue Sizes: 100, 120, 150, 175, *200, 250, 300 mm
Manufacturer Address: Unit 42, Vale Business Park, Cowbridge, Vale of Glamorgan, CF71 7PF
Manufacturer Email: [email protected]
Telephone Number: 01446 771567


HETAS has audited and verified that all applicable clauses in the test report have been passed in respect of the materials, design, and construction in accordance with the relevant BS EN type test standard for the appropriate technology, performance criteria of which is below;

Temperature Level T600
Pressure Level N1
Condensate Resistance D
Corrosion Resistance Vm
Flue Liner Material Specification L80080 & L80110
Sootfire Resistance (G:yes or O:no) and distance to combustible material (in mm) G800


The product certified has been assessed for its suitability for installation in domestic properties against the requirements of the Building Regulations and appropriate standards. The performance of the appliance has been verified as meeting the following technical performance attributes;

Combustible Clearances 800 mm
CE Mark Certificate > 0071-CPD-0024

*HETAS product approval is not valid for appliances fitted with an external air supply ducted directly to the appliance. The installer should reference HETAS technical note TN_0020 General Guidance for the Installation, Risk Assessment & Commissioning of Solid Fuel Appliances with a Dedicated External Air Supply for more information.

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