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! Our costs for big & bulky deliveries, including day lead time products, are as follows. You don't have to use your energy provider's boiler cover! Best of luck clearing up your drain and keeping it that way! The smaller models feature dual piping allowing for a more flexible installation. Awesome service quick to.