I don't think two 45's with a nipple makes a 90. In geometry, yes, but this is fluid dynamics. All I know about fluid dynamics is, in collage, I couldn't pass the prerequisite to even enroll in it.
Yes the do have adapters for grooved fittings to npt. Thanks for the idea. I'll have to look for friction loss chart for them.
Something else I could do is turn the pump on it's side so I don't need a 90 degree fitting at all. In other words, mount the pump on a wall instead of the ground. The electric motor will function the same. I don't think it matters what the orientation is for the centrifugal pump to work, but I am not sure. The plug for the priming hole will be out of position, but a few simple fittings will make that work again. The drain plug will not function, but the pump gets taken out and drained and put away in the garage for the winter. So I son't need to work while it is mounted.
The only question is, will the centrifugal pump work, when it is out of position. I will have to test that.
Cody