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2. Here's How Often You Should Drain Your Water Heater ... - AOL

   www.aol.com/heres-often-drain-water-heater...

   Step 5: Once the tank is empty, turn the cold-water supply on to flush the tank with clean water until it runs clear from the drain valve. Step 6: Remove the hose and close your drain valve before ...

3. Slip ratio (gas–liquid flow) - Wikipedia

   en.wikipedia.org/wiki/Slip_ratio_(gas–liquid_flow)

   There are a number of correlations for slip ratio. For homogeneous flow, S = 1 (i.e. there is no slip). The Chisholm correlation [2] [3] is: = The Chisholm correlation is based on application of the simple annular flow model and equates the frictional pressure drops in the liquid and the gas phase.

4. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   They include a detached (movable) slip nut and slip-joint washer; the washer is made of rubber or nylon. [18] An advantage of this type of fitting is that the pipe it is connecting to does not need to be cut to a precise length; the slip joint can attach within a range of the end of the inserting pipe.

5. Tankless water heating - Wikipedia

   en.wikipedia.org/wiki/Tankless_water_heating

   A hybrid water heater is a water heating system that integrates technology traits from both the tank-type water heaters and the tankless water heaters. [5] It maintains water pressure and consistent supply of hot water across multiple hot water applications, and like its tankless cousins, it is efficient and can supply a continuous flow of hot ...

6. Water heating - Wikipedia

   en.wikipedia.org/wiki/Water_heating

   In comparison, a typical 230 L (60 US gal) tank electric water heater has a 4.5 kW (15,000 BTU/h) heating element, which at 100% efficient results in a heating time of about 2.34 hours. At $0.16/kWh the electricity would cost $1.68.

7. Slip factor - Wikipedia

   en.wikipedia.org/wiki/Slip_factor

   Mathematically, the Slip factor denoted by 'σ' is defined as the ratio of the actual & ideal values of the whirl velocity components at the exit of the impeller. The ideal values can be calculated using an analytical approach while the actual values should be observed experimentally.