I'm about to help my father wire his shop in a few weeks. We will need to bend 1/2" , 3/4", and 1" thin wall conduit piping.

I've seen manual pipe benders like this on the market:



This style of pipe bender is ususally sold in 1/2", 3/4", 1"....ect sizes. My question is can i just buy the 1" size bender and use it for the 1/2" and 3/4" as well? Or do i have to buy a bender for each size?

 

you can buy just the 1inch shoe and bend the smaller stuff, you'll just end up with a larger radius, your take up for bends will also change on your 1/2 and 3/4 pipe.