You can use the existing floor drain lines most likely you will have to cut the drain line or add to it to line up with the hole in the shower. tubs have drains on one end while most showers have it in the middle.
You can buy a 30" by five foot base from Mustee. Nice product, comes in left or right hand drain.
It's best to have a separate waste and vent line for a shower drain. Introducing a shower drain to a tub drain without a separate line can lead to drainage issues and potentially cause backups or slow draining in the system. It's important for each fixture to have its own dedicated waste and vent line to ensure proper drainage and venting.
hair and soap scum which is grease
Plumber's snake are used to dislodge all clogs, even those in the tub and shower.
To convert a tub to a shower in your bathroom, you will need to remove the tub, install a shower pan, add waterproofing materials, and install new shower fixtures. It is recommended to hire a professional plumber or contractor for this project to ensure it is done correctly and safely.
By increasing the tub waste line to 2" instead of the normal 11/2" and by reworking the vent line so it is above the flood level of the fixture and installing a P trap under the shower pan
1-1/2 inch drain for above grade and 2 inch drain for below grade. Most UPC-based codes (IAPMO) require 2 inch above and below grade.
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Some of the best square shower drain hair catchers on the market include the OXO Good Grips Silicone Drain Protector, the TubShroom Ultra Tub Drain Protector, and the SlipX Solutions Stop-A-Clog Drain Protector. These products are designed to effectively catch hair and prevent clogs in your shower drain.
To add a handheld shower head to a bathtub, you can install a diverter valve on the existing tub spout. This valve allows you to switch between the regular tub spout and the handheld shower head. Simply attach the handheld shower head to the diverter valve, and you'll be able to enjoy the convenience of a handheld shower in your bathtub.
If the tub has a shower as well, the pipe from the faucet to the shower head could be leaking. You might also check the tube that comes OUT and fills the tub. It could be leaking back at the valve when you turn on the water.
48" for a shower and 15" above the tub for a tub.