With pipe relining, we use the structure of your existing pipes as a mold for an epoxy lining, which is pressed into the old pipe with an inflatable insert until the pipe has cured the result is a new pipe inside the structure of the old pipe. Overflowing or blocked derby drain pipes. Our range of ideal thermstore cylinders combines excellent product quality and outstanding value we have 8 models in the range, all with a 2 year parts and labour. Sharon from glasgow on 5th may 2014. We're.