Sparky wrote:

Could you describe a drum trap to me please??

I've tried to use a sink snake but it would only go so far
with no results.

We don't have a trip lever but we do have an overflow in the
same location.

Geoff

http://plumbing.hardwarestore.com/le...nd-sewers.aspx

If there is an access panel behind the tub, look and see what
the trap is.

Jim