Im trying to remodel a bath and add a shower I can everything I think but my main concern is what brand of drain is best for concrete and how to set it in concrete also I need either a liner or something put down before tile what is best and how to install. IM NOT Completely STUPID SO I CAN Probably UNDERSTAND YOUR ANAWERS THANK YOU

Rather than us trying to walk you through everything, suggest you Google the installation process. You will find You tube videos. In essence you will use an Oatey or similar drain, a vinyl pan liner, slope the floor to the drain and then tile. Harder than you may think, that's why I suggest videos.

I have reservations about just how stupid or not stupid you may or may not be. YOU ARE WELCOME. Ha, okay enough of my lame humor. There are a couple guys here that may be able to help you along with your project. Hope they pop in with some advice. If not, do as ma0641 says and YouTube it. Or better yet, hire out the work. From what I hear on the streets, all this stuff is extremely simple, straight forward, and can be done by anybody that wants to do it. I just wonder why more people don't do it themselves?

PS. Has anybody come up with a sarcasm font yet?

Well, after you cut away the concrete floor, properly add an 1 1/2" pipe coming out of the gravel you need the pipe to give and the most popular drain I know of is Oatey which uses a rubber donut over your new pipe. Using a fiberglass shower pan will give you proper pitch to the drain. It is easier to do than trying to make your own base. This is a hard job, that takes some equipment, determination and is probably why most are willing to pay lots of cash to a contractor to get it done.

The other experts gave you the skinny on the drain. Don't put anything less then 2" under the slab. This may help. Good luck, Tom