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2. Reduced pressure zone device - Wikipedia

   en.wikipedia.org/wiki/Reduced_pressure_zone_device

   The eight named backflow assemblies all have two resilient seated isolation/shut off valves with properly located test ports. These assemblies have the distinct advantage of being in-line serviceable and can be tested & repaired without having to remove an installed assembly.

3. Condensate pump - Wikipedia

   en.wikipedia.org/wiki/Condensate_pump

   This stage may switch off the HVAC equipment (preventing the production of further condensate), trigger an alarm, or both. Some systems may include two pumps to empty the tank. In this case, the two pumps often alternate operation, and a two-stage switch serves to energize the on-duty pump at the first stage and then energize the remaining pump ...

4. Float switch - Wikipedia

   en.wikipedia.org/wiki/Float_switch

   That is, the switch's "turn on" point may be much higher than the "shut off" point. This minimizes the on-off cycling of the associated pump. [2] Some float switches contain a two-stage switch. As liquid rises to the trigger point of the first stage, the associated pump is activated.

5. Gate valve - Wikipedia

   en.wikipedia.org/wiki/Gate_valve

   Gate valves are used to shut off the flow of liquids rather than for flow regulation, which is frequently done with a globe valve. When fully open, the typical gate valve has no obstruction in the flow path, resulting in very low flow resistance. [1] The size of the open flow path generally varies in a nonlinear manner as the gate is moved.

6. His Wife Dared Him to Dress Up as Buddy the Elf and Frolic ...

   www.aol.com/wife-dared-him-dress-buddy-093000127...

   Ryan Beeler and his wife, Melissa, flew from their home in Oklahoma to New York City to celebrate his 40th birthday. Before they went, the couple decided to watch Elf to get into the holiday ...

7. This Is The Healthiest Source Of Protein, According To A New ...

   www.aol.com/healthiest-source-protein-according...

   A new report from the United States Department of Agriculture (USDA) suggests that beans and legumes are healthier proteins than lean meat: here's why.

8. Why Elephants Have Big Ears: The Secret to Staying Cool

   www.aol.com/why-elephants-big-ears-secret...

   Elephants have massive ears to help regulate their body temperature. They have huge blood vessels in their ears. The blood vessels are large and quite visible on the backs of the elephant’s ears.

9. Sail switch - Wikipedia

   en.wikipedia.org/wiki/Sail_switch

   A sail switch, vane switch or flow switch is a mechanical switch that is actuated on or off in response to the flow or non-flow of a fluid such as air or water. [1] A sail switch typically operates through the use of a paddle or a diaphragm which gets displaced due to the force of fluid or air moving past it.