: If that isn't the problem, you probably have a leak in the lead pan or whatever waterproof membrane (built-up asphalt in older installations) was used. In that case you have no choice but to rip up the old pan and put in a new one, before the floor members are irreversibly rotted...
: : I have an existing floor drain in a built in shower.
: : With an existing mud floor.The drain is leaking out the bottom into the celler.

: : Is there a way to replace the drain with a mud floor without replaceing the mud floor. Do they have a kit
: : or somthing to do this ?

You have to replace the floor. However you could order a manmade one piece floor. You probably have a cast iron p trap that needs to be replaced anyway.The previous speaker is right about replacing the safety pan. Lonnytheplumber