Quote:
Originally Posted by coney
I can't believe that a campground could possible have 140 psi coming out of what is a essentially a spigot. NO WAY. My whole town is under 60 psi and that is flowing through 8" mains.
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It doesn’t matter what size the main is. In fact, it is common for smaller mains to have a higher water pressure than larger mains because smaller mains with a pressure equal to that of larger mains cannot supply the same volume of water. The higher pressure of a small main can produce the same volume as a larger main with a lower pressure. Some electricians (Cavie) might even understand this theory because it is very similar to the way electricity works.
It is very common for a water company to increase the pressure in their system to compensate for demand that wasn’t expected when a system was designed years ago without thought for future development. In this case, the smaller, older mains will have a higher pressure than a newer system that is built with consideration for expansion. This is exactly why the pressure range is so big in the area I work in — hundreds to thousands of newer homes have been built and added onto some of these systems that were put into the ground in the 1940s and earlier — other, newer houses are on systems that were designed and built from the 1990s to today. The houses on the older systems are those with the highest water pressure.
Bruce
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