A long screwdriver plumbers pliers channel locks a properly sized wrench to fit the body of the drain key or really big channel locks vice grips.
Replace tub drain pipe video.
A rubber gasket underneath the tub seals the drain elbow to the tub.
If you have to hold your drain lever down for the tub to drain it is more than likely the tension spring on the back of the overflow plate.
Here are a few bathtub drain schematics and bathtub plumbing diagrams.
This is one of my early videos.
I am so sorry this takes me so long to explain.
Take the measurements of the drain pipe and drain hole.
I will do better in the future.
Items needed to remove and replace a modern screw in bath tub drain not all drains are like this.
Step 1 purchasing drain pipe.
Leaking tub drain repair old plumbing repaired pvc drain to stop leak.
An alternative method for replacing a tub drain is to use a flanged tailpiece and a 1 1 2 inch tubular trap with a trap adapter to convert back to the 1 1 2 inch drain pipe.
Fairly simple drain system.
To replace a bathtub drain pipe you will need cement drain pipe drain wrench hacksaw measuring tape paper and tub drain kit.
Note down the measurements and use them to purchase the pipe of proper length and diameter.
The new bathtub drain.
This type of trap includes slip joint washers that are easy to use and are similar to those used on kitchen and bathroom sink drains.
A bathtub drain wrench or sometimes called a drain key.
You can replace just this plate at your hardware store for a few dollars.