What maintenance on Leakless Water Pumps?

[29er]

Since I have to replace a head gasket and will have the water pump off anyway, is there any maintenance needed on the water pump? It has about 5,000 miles on it and has worked fine. It currently has no issues. Other than cleaning and installing a new gasket, there's nothing more to be done, right? How many miles have you guys gotten out of your leakless water pumps?

Thanks!
Mike