My shower (fiberglass) drain is leaking and needs

There are a few different drain styles available. If you pop the drain cover off of the shower, does it look like a brass ring pressed up against a rubber boot? If this is the case, that brass ring will have to unscrew first. if this is not the case, There will be a large nut on the underside of your shower that holds the drain in place. Often times, a helper is very beneficial to hold the top part of the drain assembly in place while the other person unscrews the bottom portion. You may say a few choice words during the process, as sometimes an older drain becomes hard to unscrew. There is a special tool for removing the drain, and it is relatively inexpensive. If the pvc is glued into the drain, a section of pipe will have to be cut away to get the tool around the strainer nut. Plan on replacing the trap and strainer. If it is pvc, you will need a coupling, trap, plumbers putty to go around the strainer where it meets the base of the shower, a new strainer, and possibly a couple street 45's and a couple of 45's. Don't forget the glue, primer, and a short piece of pipe.