Excessive water leak

I recently had the hose changed on my 2005 Nissan Pathfinder that leads to the heat core because of water backing up into my passenger floor.
That seemed to fix the water in the car problem, but it still leaks excessively under the car when the heat is on. When I park there is a huge puddle underneath the passenger side. It is definately only water. Is this normal, or can this be another issue.
The heat works fine.
(Thank you for answering the original question on the water leak!)