Rigid tools sell a remover that fits into the thread and you can then unscrew it. Your local plumbing suppliers should have one.
All advice is given with-out seeing the job, and hence all advice MUST be taken as advice with limited knowledge on the exact situation. NO responsibility can or will be taken. And yes, I am a licensed Plumber and Drainer with my own business in Brisbane Australia.
Try visiting ….
http://www.internut.com.au … http://www.prostate-healthcare.com … http://www.ebookmegastore.com