is the part of a ceiling lighting/fan fixture that contains the wiring. The fixture base secures to the ceiling box to provide electricity to the fixture. Home Improvement Glossary flapper valve The valve at the bottom of the toilet tank that controls the flow of water into the tank. An opaque latex paint finish that works great on interior walls and ceilings. Home Improvement Glossary flexible copper Flexible copper, which is often used for dishwashers, refrigerator icemakers, and other appliances that need a water supply. It's easy to bend, but if it becomes kinked, you must cut the piece off and replace it. Sections of flexible copper pipe are joined using either soldered or compression fittings. Home Improvement Glossary float A float is a board with a handle that smoothes thick compounds such as concrete. Home Improvement Glossary floatball The floatball is a ball that is inside the toilet tank that prevents the tank from overflowing. When the water level rises, the floatball rises which shuts off the water supply. Home Improvement Glossary flush lever The flush lever is the part on the outside of the toilet tank that you push to cause the toilet to flush. Home Improvement Glossary flush lever rod The flush lever rod connects the flush lever and controls the flapper valve or tankball. Home Improvement Glossary flush valve The flush valve is the controlling mechanism for the flush lever on a toilet tank. Home Improvement Glossary flux paste The soldering paste used to sweat copper