Sensus 143-1 1/4 Regulator

Is this the same as the 143-80-1-1-1/4?

Yes, they are identical.

Is this a 143-80-2?

Hi, 143-80-2 is not a completed part number. It should have more number after, for example 143-80-2-1, 143-80-2-1-1/4 etc. Thanks.