If the pipe is pretty well blocked, I would suggest you do what another poster recommends - get a plumber with a water jet "cutter". I've used this service before for blocked pipes. They normally have a camera attached to the cutter as well, so they can see what they're cutting etc. If the roots are not too thick, this is a very successful way of unblocking pipes.
Originally Posted by Williamstown
After it has been unblocked, you can then use the Rootox & Actizyme to keep it clear.
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