Price match promise! If you can find our twin wall flue system at a better price than you can see on our website then we will beat it! We are confident that on a like for like system we have the very best prices.  Our Dinak DW and KC Convessor twin wall insulated chimney flue pipe are a premium grade flue system which is HETAS approved and been tried and tested. Available and in stock for immediate dispatch. Easiest to install on the market and has a superior weld finish and manufacture to most other brands. Trade customers come back to us time and time again!