Yup, water pump check valve is leaking. However, you can buy an in-line check valve. It will be cheaper than replacing the pump.
Chuck - Sparta, TN
2012 Jay Flight 22FB, 2 x Honda EU2000i
2013 GMC Yukon XL Denali AWD
EDUCATION is what you get when you read the fine print.....
EXPERIENCE is what you get when you don't.