Keep Having To add Anti Freeze

[Rocca's Lex]

I recently just had my water pump replaced due to my car running hot when I drove in speeds over 70 miles and above. Now I am noticing that I continue to have to add Antifreeze when I take long trips and after a while the car still is running hot when I drive long distances in rates of speed over 70. Why does my car continue to need Antifreeze added? All the leaks were addressed when the Water Pump was changed. 

[rolando]

look for coolant under passenger and rear passenger wet carpet. Possible leaking heater core .