flapper: the rubber flap at the bottom of the toilet tank, which lifts when the handle is depressed, allowing water to flow into the tank. It closes when the handle is released, allowing the tank to refill for the next flush.

flashing: materials used to weatherproof areas of the roofing material that intersect with other materials. Flashing may be found at intersections with walls, vent pipes, chimneys, skylights, other roof areas, valleys, drains, etc. Flashing may be constructed of many different materials, such as metal, plastic, rubber, etc.

Typically copper tubing that carries freon between the interior evaporator coil and exterior condensing coil in a central AC unit.

fuse: a device that is designed to protect its electrical circuit from the damage that can be caused by a short circuit or overload situation. Fuses function similarly to breakers, but unlike breakers, a fuse must be replaced once overloaded/blown.

gable end: the triangular portion of the edge of the house and roof intersection below the two slopes of a gable roof house

GFCI: acronym for Ground Fault Circuit Interrupter.  A circuit breaker or receptacle that has the ability to shut off the power to its circuit if it senses a hazardous situation involving electricity improperly traveling to ground along its circuit. Click here to see where GFCI protected outlets are required

The slope of the earth relating to a structure. A positive grade will effectively drain water away from a structure and its foundation.

ground: in the home, an electricity conducting connection (intentional or accidental

grounding electrode conductor: the wire (conductor) that is used to join the metal portions of the electrical system (appliances, conduit, panels, etc.)  to the neutral conductor and grounding electrode conductor at the service equipment

grounding electrode system: all materials in a home that can carry current/are made of metal (underground water pipes, building frame, ground rods, etc.) shall be bonded together to form the grounding electrode system