Shower drain

[Stevehere]

My house was built in 2006.
I have a bathroom upstairs that has a shower enclosure. It is all plastic as one unit. There is a center drain hole.
I now have a small wet patch on the ceiling below which as it is directly under the shower drain must be from that.
I opened up the silver cover plate and what you see in the pictures I have attached is what is there.
My first thought as a hopeful easy fix is to caulk around the outside of the drain pipe, the small gap that is between the edge of the pan and the center pipe.
However that gap has been there all the time without any issues until now. If I caulk it, will I then have a build up of water as it has no where to go? Where does that water drain to now?
Thank you

 

[Terry]

The pipe looks to be too short there. If you can't seal it from the top, you may need to replace the drain or the pipe. You may be able to hook the pipe and slide it up higher.

 

[Sponsor]

 

[Stevehere]

The pipe looks to be too short there. If you can't seal it from the top, you may need to replace the drain or the pipe. You may be able to hook the pipe and slide it up higher.

Thank you for the reply Terry. There is no play in the pipe as it is attached to whatever it is on the drain cover. Knowing what that looked like would help.
My thought now is to caulk it but all the way up to the top of the center pipe so water has somewhere to go.

 

[Jadnashua]

WHen standing in the shower, does the pan flex at all? Put a glass of water on the pan and move around, maybe have someone down low looking at the glass to see if the water moves around. Many of those joints between the pipe and the drain are friction/compression fits rather than being cemented together. Can't tell for sure on yours, but if it's a friction fit, over time with movement, the pipe could slide out a little.

 

[Stevehere]

I did the glass of water test and nothing moved.
I have decided to use putty to fill in the outer edge and see what happens. At least I will know if it is that or the pipe.
Thanks