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2. How Much Does It Cost to Replace a Water Heater? - AOL

   www.aol.com/much-does-cost-replace-water...

   Gas water heaters cost between $600 and $2,700 to replace, for an average cost of about $1,650. Electric water heaters cost between $600 and $3,500 to replace, for an average cost of about $2,100 ...

3. Cathodic protection - Wikipedia

   en.wikipedia.org/wiki/Cathodic_protection

   Over time the galvanic anode continues to corrode, consuming the anode material until eventually it must be replaced. Galvanic or sacrificial anodes are made in various shapes and sizes using alloys of zinc, magnesium, and aluminum. ASTM International publishes standards on the composition and manufacturing of galvanic anodes. [10] [11] [12]

4. Storage water heater - Wikipedia

   en.wikipedia.org/wiki/Storage_water_heater

   Solar heat is clean and renewable. This is the most modern system. Increasingly, solar powered water heaters are being used. Their solar thermal collectors are installed outside dwellings, typically on the roof or walls or nearby, and the potable hot water storage tank is typically a pre-existing or new conventional water heater, or a water heater specifically designed for solar thermal.

5. 3M Announces Certification for CNG Tank - AOL

   www.aol.com/2013/02/12/3m-announces...

   3M Announces Certification for CNG Tank Tank is lighter and more cost effective for fleet vehicles ST. PAUL, Minn.--(BUSINESS WIRE)-- 3M (NYS: MMM) announces it has successfully completed the NGV2 ...

6. Galvanic anode - Wikipedia

   en.wikipedia.org/wiki/Galvanic_anode

   A long slender stand off anode (installed on legs to keep the anode away from the structure) has a UF value of 0.9, whereas the UF of a short, flush mounted anode is 0.8. [14] Anode capacity is an indication of how much material is consumed as current flows over time.

7. ADDING MULTIMEDIA 3M Announces Certification for CNG Tank - AOL

   www.aol.com/news/2013-02-12-adding-multimedia-3m...

   ADDING MULTIMEDIA 3M Announces Certification for CNG Tank Tank is lighter and more cost effective for fleet vehicles ST. PAUL, Minn.--(BUSINESS WIRE)-- 3M (NYS: MMM) announces it has successfully ...

8. Gasoline gallon equivalent - Wikipedia

   en.wikipedia.org/wiki/Gasoline_gallon_equivalent

   One GGE of CNG pressurized at 2,400 psi (17 MPa) is 0.77 cubic feet (22 litres; 5.8 US gallons). This volume of CNG at 2,400 psi has the same energy content as one US gallon of gasoline (based on lower heating values: 148,144 BTU/cu ft (1,533.25 kWh/m 3) of CNG and 114,000 BTU/US gal (8.8 kWh/L) of gasoline. [22]

9. Hot water storage tank - Wikipedia

   en.wikipedia.org/wiki/Hot_water_storage_tank

   A hot water storage tank (also called a hot water tank, thermal storage tank, hot water thermal storage unit, heat storage tank, hot water cylinder, and geyser) is a water tank used for storing hot water for space heating or domestic use. Water is a convenient heat storage medium because it has a high specific heat capacity. This means ...