That's ludicrous...

 

Collie, can you please explain the appeal to you of draining the cooling system via the water pump bolt. As Best pointed out, the lower radiator hose is at a lower point in the system. Thanks.

 

Easier to get to, and easier to control the coolant flow. If you keep the coolant bottle cap on it comes out a bit, then not at all, then you unscrew, and bob's your uncle, here comes the coolant.

This is my first time with it, going to pick up a new bolt, the old is a bit haggard, and will report if it leaks at all.