Based on ccor's comments, I looked up in previous threads about the Joukowski's equation and found that the pressure increase, DH = c (wave speed) * Dv (change in pipe flow velocity) / g
In my Pumping Station Design Book, I found that the wave speed for PVC pipes is typically 1000 - 2000 ft/s...
Here is some more information:
The elevation difference between the pump and the reservoir (really an 18,000 gal concrete tank) is about 300 ft.
The well pumps through the distribution system to the tank.
The line between the well and tank is 4".
Other lines in the distribution system...
I am working on making improvements to an existing water system and have a few questions. Background: 66 homes spread over 6 miles; distribution pipes are 4", 2", and 1.5"; Currently the well's 10 hp submersible pump runs continuously at about 90 gpm, causing the reservoir (located 2 miles...
Thanks for the tip. Here is some more information on the system.
The fitting that broke is a 1 1/4 x 1 x 1 1/4 tee. The piping connected to it is unlined black steel threaded pipe called Dyna Thread 40.
The dry system is a closed sprinkler system kept under pressure (33 psig) by way of an...
I am looking into a the cause of failure for a cast iron fitting that is part of a 12 year old dry pipe sprinkler system. The tee-fitting was located at a high point and appears to have broken during freezing weather due to trapped water.
The company who does the annual testing and makes...
