Posted by Terry Love on April 25, 1998 at 13:26:30:
In Reply to: locating a cleanout posted by J P on April 24, 1998 at 02:33:05:

J.P.,
Most cleanouts are "not" under slabs. When adding more plumbing to an existing system, a wye fitting is cut into the line and installed with the correct couplings. Pipes under slabs can be found by using detection devices or sometimes by witching with wires cut from a coat hanger.
Terry