Angle Stop – An angle stop is a shutoff valve located between the supply line and the faucet or toilet, perpendicular to the outlet, by the fixture. It should be turned off during a plumbing emergency.
Ballcock – A ballcock is a device controlling the flow of water from the supply line to the toilet. Located in the tank water, the apparatus is controlled by a float. The float drops once the water is flushed, opening the ballcock and releasing water into the tank. After the tank is refilled, the float comes back up to shut off the ballcock.
Flow Control Valve – Device designed to reduce water flow to a plumbing fixture. Often used to improve efficiency and reduce operating costs. Also a check valve that prevents flow reversal when heater is turned off.
Increaser – Plumbing drainage fitting that enlarges the diameter of a straight-line run by virtue of its larger size on one end and smaller on the other. If it is used for the reverse, to make the diameter of a straight-line run smaller, it is called a reducer.
Outdoor Coil -The portion of a heat pump or central air conditioning system that is located outside of the home itself and functions as a heat transfer point for collecting heat from and dispelling heat to the outside air.
Shutoff Valve – The term shutoff valve generally means the angle stop under a fixture; however, it may be used for a branch line valve or the large valve typically found next to the water meter. These are turned off in plumbing emergencies.
Split System – A central air conditioner that consists of two or more major components, including a compressor-containing unit and condenser. This is the most common type of system installed within a home.
Trap – A trap is a curved piece of drainage pipe that keeps noxious gases from escaping up through the drain; every fixture has one. “P” traps are installed in all fixtures with drains except in toilets. Instead, toilets have “S” traps installed.