[philgil]

Thanks for the reply kactuskid!

Let me say that when I opened the ceiling right below the shower, I can see water leak coming out of the shower drain but my simulation does not show a leak.

I do not know how the shower pan is built. If there is a leak somewhere in the pan, does it have another layer underneath so that water is directed towards the drain (or outside the drain).

When I opened the ceiling, I can see the water pipe for the shower valve and ther is no leak.

I can do another simulation using hot water to see if it will show a leak.

Thanks again!