embodiments are provided for an automatic fluid shut off device having a float disposed in a fluid catch basin attached to a first end of a rod movable in a direction of rising fluid in the catch basin ; a second rod end extending to a fluid supply base and terminating adjacent to a restrained latch arm end , the latch arm end configured to be pivotably displaceable upon a force by the second rod end in response to a rising fluid in the catch basin ; the latch arm pivotably connected to a shut - off valve ; and the shut off valve retained in an open position while the latch arm is restrained , and under a rotational force to close the shut - off valve upon a release of the latch arm in response to the force by the second rod end . the latch arm can be restrained by a latch arm retention notch extending downward and inward .