pvc conduit under a slab for low voltage wire

[Dumber than lumber]

We want to clean up the wiring for the solenoid for our irrigation (inground sprinkler) system. Right now the wire starts in the garage, then goes down the wall (inside 1/2" pvc), through the wall, into 1/2" pvc, and then into the dirt at the edge of a slab. Continues in the dirt (about 1.5 inches deep) for about 12 or 13 feet. Then in the dirt along the side of the house for another 7 or 8 feet, and finally into the valve box.
Has worked okay for 25 years or more.
But, I want to allow for the possible addition of multiple solenoids. (We are on a K-rain timer where we only have a single solenoid that switches sequentially to the next zone.)
We are going to have the 4 foot wide slab extended another 4 or 5 feet, so I want to get the conduit routed and in place now. Have already drilled the slabt to accept a piece of 3/4" pvc. Can't figure out how to get a 90* elbow in there though. Short of cutting a slot out of the existing slab, any suggestions?

located in Florida

Thanks for any constructive comments, etc.

 

[The Cobbler]

can't quite picture what you're trying to do, but can you put a straight pc of conduit in the hole , then heat it and make your own elbow below the concrete?

 

[ard]

A picture or drawing would be helpful...

If the hole in the existing slab is within 12-24" of the edge, just excavate under the slab, place the 90 sweep from underneath....

 

[Dumber than lumber]

Thanks guys.
The hole in the slab is actually 4 feet from the edge. Not sure a home-bent elbow is going to work too well.
I will see if I can get a picture, or a drawing.

 

[ard]

Thanks guys.
The hole in the slab is actually 4 feet from the edge. Not sure a home-bent elbow is going to work too well.
I will see if I can get a picture, or a drawing.

So how will you get from the underside of this hole, which is 4 feet from all edges, to ANYWHERE??

 

[Tmart86]

time for a bigger hole.