I just had a 4 ton Goodman installed and its working great but the outside unit is on a new slab and it always has a puddle of water slowly seeping from under the unit and off the slab. The drain pipe is working ok..pumping water out. I looked inside and notice a brass colored pipe had lots of condensation on it, could that be the source and arent they usually insulated? or is this just normal. Im in Florida. thanks.