If slow drain you have a cracked windshield replace it don't settle for windshield repair. It is bogus. If your insurance company insists on windshield repair, refuse that type of service and demand a new one. You have that right and you also have the right to choose your own glass company.
There are two, one on each side of the toilet, closet bolts which hold the toilet to the floor. If there are caps over the bolts, remove or pop them open. Using a small crescent wrench unscrew the nuts from the bolts. Alternate side to side when unscrewing this will be much more important when reinstalling the water line repair bolts but alternate anyhow.
This so impressed me, that I thought, here is the man who might fix my sink problem, and I told him about my kitchen sink. The look on his face was priceless, as he said, "Ridiculous! Sinks don't leak if they're new." He even showed me what to do. He took out a big heavy-duty screwdriver with a big flat-head blade and showed me. "This is what's probably lose." He put the blade of the screwdriver in a notch the size of a giant screw head that was right in the center of the drain basket where the plug sat in.
The next step in this process is to determine what type of method is available for fixing the problem. You cannot just caulk a crack or fill it in with cement and hope for the best. Unfortunately, there is more work than this because you have to fix the problem from both the inside out and the outside in. This takes a professional in most cases to determine the best method for repair.
Investigate the plumber's reputation. Ask a neighbor before starting your search or check online for customer reviews. Call the Better Business Bureau or your city to ask about any complaints on file against this company. Finally, ask the plumbing company for references from customers. If they are reluctant to provide references water line repair call another plumber.
And the way to know what's sufficient? Well, until the work is done an the bill paid you won't know for certain, but this is the best that can be suggested and normally works very well.
Bottom line is that it is now very easy for even a desk jockey to fix his own pipes. Go by the closet home improvement store on your way home. Pick up some of these fittings and impress the wife with talents that she did not know you had. You may even get brave and do that small plumbing project that she has been begging for. Now you can use these fittings to cut into that water line to run that new outside faucet or hookup that water filter yourself. With the push type fitting plumbing has been made easy enough for anyone to be able to do it.