Hello. It is necessary, for starters, to analyze and assess the extent of the malfunction. But this should be done by a specialist who has all the necessary tools for this. Perhaps he will say that it is still possible to fix and fix it. But it may also be the option that you will have to completely change the old plumbing for a new one. We had everything according to the second scenario. But it's for the best, but now we are calm and do not need to call workers every month. And we contacted here - https://pomplumbing.ca/commercial-plumbing/.