A 90 PLASTIC ELECTRICAL CONDUIT ELBOW IS REQUIRED TO PROTECT THE TUBING WHERE IT EXITS THE SLAB. INSERT THE TUBING INTO THE ELBOW BEFORE TYING IT TO THE REBAR

IF LEFT UNPROTECTED THE TUBING OFTEN GETS DAMAGED AT THE SLAB
REQUIRING THE SLAB TO BE BROKEN UP TO PUT A SPLICE IN  IT

IF THE TUBING GETS DAMAGED AT THE TOP OF THE ELBOW, YOU CAN
SIMPLY CUT THE ELBOW BACK TO INSTALL A SPLICE