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2. This Is Why Your Lawn Looks So Much Worse Than Your ... - AOL

   www.aol.com/why-lawn-looks-much-worse-134900300.html

   What to do: Take a cue from your lawn and mow when the grass looks like it needs it, not on a weekly schedule. For example, for cool season grasses, you may need to mow twice a week in the spring ...

3. Reduced pressure zone device - Wikipedia

   en.wikipedia.org/wiki/Reduced_pressure_zone_device

   A reduced pressure zone device (RPZD, RPZ, or RPZ valve) is a type of backflow prevention device used to protect water supplies from contamination. RPZDs may also be known as reduced pressure principle (RP), reduced pressure principle backflow prevention devices, [1] [2] reduced pressure zone assemblies (RPZA), [3] or reduced pressure principle ...

4. Air compressor - Wikipedia

   en.wikipedia.org/wiki/Air_compressor

   Air compressor supplies air into a nail gun.. An air compressor is a machine that takes ambient air from the surroundings and discharges it at a higher pressure. It is an application of a gas compressor and a pneumatic device that converts mechanical power (from an electric motor, diesel or gasoline engine, etc.) into potential energy stored in compressed air, which has many uses.

5. Pressure tank - Wikipedia

   en.wikipedia.org/wiki/Pressure_tank

   The diaphragm or bladder may itself exert a pressure on the water, but it is usually small and will be neglected in the following discussion. Case 1 is an empty tank at the charging pressure P c (gauge). The total volume of the tank is V t. Case 2 is a tank in use, with the air pressure at pressure P (gauge) and a water volume of V. Referring ...

6. Check valve - Wikipedia

   en.wikipedia.org/wiki/Check_valve

   Tilting-disc inconel check valve Check valve symbol on piping and instrumentation diagrams.The arrow shows the flow direction. Vertical lift check valve. A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.

7. Compressed air - Wikipedia

   en.wikipedia.org/wiki/Compressed_air

   Relative humidity is governed by the properties of water and is not affected by air pressure. [14] After compressed air cools, then the vaporized water turns to liquefied water. [15] [16] Cooling the air as it leaves the compressor will take most of the moisture out before it gets into the piping. Aftercooler, storage tanks, etc. can help the ...

8. Water hammer - Wikipedia

   en.wikipedia.org/wiki/Water_hammer

   Water towers (used in many drinking water systems) or surge tanks help maintain steady flow rates and trap large pressure fluctuations. Air vessels such as expansion tanks and some types of hydraulic accumulators work in much the same way as water towers, but are pressurized. They typically have an air cushion above the fluid level in the ...

9. Vacuum breaker - Wikipedia

   en.wikipedia.org/wiki/Vacuum_breaker

   Pressure type vacuum breakers are similar to atmospheric vacuum breakers but have a spring-loaded check valve to allow operation of under pressure for long periods of time. Spill-resistant vacuum breakers utilize a check valve and air vent inlet that allows air to enter before the internal check valve opens, thereby preventing water spillage ...