A 100-125mm increasing twin wall adaptor is a fitting that connects a single-wall flue pipe or stove to a larger twin-wall flue system. Twin-wall flues are insulated and offer more flexibility in installation, as they can be run closer to combustible materials.
For use on solid fuel and gas/oil appliances. eg: woodstoves, gas coal effect fires, oil and gas boiler and any solid fuel appliances.
Outer skin is made from 304 grade stainless steel and is 0.4mm thick. Inner skin is made from 316 grade stainless steel and is 0.4mm thick. Insulation is compressed rockwool giving a density of 200kg/m3. All parts are fully welded.