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2. Sump pump - Wikipedia

   en.wikipedia.org/wiki/Sump_pump

   Power – Sump pump motive power will vary from 1/4 horsepower to multiple horsepower. Head pressure – The hydraulic head pressure of a sump pump describes the maximum height to which the pump will move water. For instance, a sump pump with a 15 feet (4.6 m) maximum head (also called a shutoff head) will raise water up 15 feet (4.6 m) before ...

3. Backflow prevention device - Wikipedia

   en.wikipedia.org/wiki/Backflow_prevention_device

   Backflow prevention device. The simplest, most reliable way to provide backflow prevention is to provide an air gap.An air gap is simply an open vertical space between any device that connects to a plumbing system (like a valve or faucet) and any place where contaminated water can collect or pool.

4. Pumping station - Wikipedia

   en.wikipedia.org/wiki/Pumping_station

   Features may include controls for fully automatic operation; a high-level alarm indication, in the event of pump failure; and possibly a guide-rail/auto-coupling/pedestal system, to permit easy removal of pumps for maintenance. Traditional site constructed systems have the valve vault components installed in a separate structure.

5. Ground-level power supply - Wikipedia

   en.wikipedia.org/wiki/Ground-level_power_supply

   A number of ground-level power supply systems were developed from the 1970s through the 1990s, [8] but were not reliable or safe enough for commercial use. [9]The first ground-level power supply system developed to modern safety standards was the Ansaldo Stream, [7] although a competing system, Alstom APS, was the first to be commercially implemented in 2003.

6. Uninterruptible power supply - Wikipedia

   en.wikipedia.org/wiki/Uninterruptible_power_supply

   A large data-center-scale UPS being installed by electricians. An uninterruptible power supply (UPS) or uninterruptible power source is a type of continual power system that provides automated backup electric power to a load when the input power source or mains power fails.

7. Stand-alone power system - Wikipedia

   en.wikipedia.org/wiki/Stand-alone_power_system

   Schematics of a hybrid system. A stand-alone power system (SAPS or SPS), also known as remote area power supply (RAPS), is an off-the-grid electricity system for locations that are not fitted with an electricity distribution system. Typical SAPS include one or more methods of electricity generation, energy storage, and regulation.