developed leak while flushing coolant

[rlu_tech]

I am in the process of running water in my cooling system to flush it. After filliing up the system this afternoon, and driving about 25 miles, it started leaking coolant. I cant exactly see where the source is, but it seems to becoming from where the large hose from the degas bottle attaches to the water pump. Anyone ever encounter this? Hoping the pump isnt bad!!!!