[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

If an oxygen molecule left Detroit travelling at 67 mph, and a CO2 molecule left New York City...

OK Ladies and Gentlemen, lets add a sidebar (I watched "The Practice" the 
other night) to the "gas saturation" issue.

It is said one possible reason for the high pearling rates after water 
changes is the higher concentration of dissolved gasses in the pressurized 
water lines. As usual, I am confused. My question is "How did these 
additional gasses get into the water?".

Most of the municipal water supplies I have seen here in Texas use an 
elevated tank commonly called a water tower. This provides a near constant 
pressure at the bottom of the tower before entering the distribution 
system. Variations in pressure at the end users are a function of friction 
and changes in the water flow. The more total flow, the lower the pressure 
at the end of the pipe.

The tank at the top of the water tower is at atmospheric pressure, 
resulting in the gasses reaching equilibrium levels. If the water is near 
or super-saturated when it comes out of the faucet, where does the 
additional gas concentration originate?

Douglas Guynn, in central west Texas, where there is more sand in the air 
than moisture.

"They that can give up essential liberty to obtain a little temporary 
safety deserve neither liberty nor safety." --Benjamin Franklin

"I would rather be exposed to the inconveniences attending too much liberty 
than to those attending too small a degree of it." -- Thomas Jefferson