YES.
Shower drain goes into a trap under shower. Continue piping from trap to drain line.
Water won't drain from shower. Either trap or shower drain line is clogged.
The shower drain and waste lines on up to the other fixtures located above need to be clear so that water will flow. Just downhill of the shower drain there is probably a blockage in the waste pipe. The blockage could cause slow draining. If it is completely blocked, the shower pan will not drain back out over time. You will need to run a plumbers snake down the line below the shower drain. If the toilet in the same room as the shower when flushed also shows water coming into the shower drain, it will be best to take up the toilet off the base and run a plumbers snake from that point. Warning for very slow draining lines or lines that do not drain, DO NOT use Drain cleaning chemicals. Good luck and you may wish to call rotorooter.
typically shower drains are 2"
A shower rough-in usually refers to the distance from the wall to the center of the shower drain , measured out away from both walls in a shower to the center of the drain. It also maybe referring to the height and the center line of the placement of the shower valve.
The center of the shower floor where the tile shower drain would normally be positioned ... drain base. After this step the sloped mortar bed should be ... pan liner or membrane in our instructions.
Possibly a caulked joint ( lead and oakum )
This can be a complicated job as the toilet drain ranges from 3" -4" and a variety of materials from Plastic to cast iron to galvanized. Then there is the venting to consider and NO a shower drain CANNOT be used for a toilet discharge as the shower drain is normally 2" diameter
If you have a drain available. You may need to chip some concrete around the drain to install the bottom half of the drain. With that in place, set the shower over it and the top piece screws into the drain to form a seal. You can build a 2x4 frame and raise the shower up enough to run a drain to a sump or a floor drain.
2"
2"
The main drain is plugged. Not completely, but enough that it is easier for the upstairs water to come out in the shower and floor drain instead of going out the drain.