Dyno-rod have been unblocking drains nationwide for nearly years dyno-rod cannot be matched by any other company in this regard we’ve seen it all, we’ve cleared it all! Helpful, quick and well priced, definitely recommended and will use again.“. Did you find this review helpful? Contact us today for a free, no obligation quote. We are fully insured heating and cooling professionals! These sealed systems heat water directly from the mains, meaning you don’t need a hot.