Help with hooking up to main.

[Michael O.]

Can someone please help me identify the main supply line coming in from the water meter.
The Left and middle are 3/4" and the one on the right is 1/2".
My guess is it's the left blue 3/4 pipe, since it T's off from there.
After identifying the main supply line I will hook up under the T and run to the water heater and rest of the house.

The picture attached is taken of the water lines beneath my water heater closet (in garage).

I'm redoing my home plumbing, ( because I've had 5 leaks in 6 years) using pex a to repipe and replace copper. My neighbor is a plumber and offered to help me, unfortunately he's been in the hospital since Tuesday, so hoping to get some help from other plumbers here. Thank you

 

[James Henry]

It probably is, the other 2 go under the slab and come up in another location.

 

[Sponsor]

 

[Michael O.]

It probably is, the other 2 go under the slab and come up in another location.

Yeah, that's what I'm thinking, the one on the Left is also the one that the water heater line hooks up to. The one on the right is a 1/2" so that's not it, and the one in the middle threw me off since I didn't expect two 3/4s to be there. Thank you for your response.