Pump Tips

There have been numerous questions asking the differences of impellers and casings when there is an “H” or “G” following the pump size. For example: 3×4-10 and 3×4-10H 3×4-8 and  3×4-8G 4×6-10, 4×6-10H and 4×6-10G 8×10-15 and 8×10-15G What do these letters indicate? The letters specifically by themselves don’t explain anything to you, except that