Please help me understand flows in a newly installed pump station. Two booster pumps that came with NW factory tests have materially identical performance curves, yet in practice, they produce identical discharge head, but with 7% difference in flow. How theoretically or practically is that...
What kindof adhesion numbers indicate a satisfactory candidate for top-coating? We have a steel tank with a 40 y.o. lead paint on the exterior that was topcoated 18 years ago with a Macropoxy 920 primer and Corothane II Urethane. The more recent topcoat is showing localized spots of...
We are designing a 20" ID HDPE potable water pipeline. PPI's design bulletins have been useful, but seem to be somewhat incomplete in at least one area. When calculating the Poisson pullout effect force, nothing is mentioned of the restraint developed due to the soil-pipe friction along the...
Hello, all. I'm a water guy and our structural and foundation engineers aren't available...sorry if this is a rudimentary and painfully ignorant question.
I am designing a little pumpstation for pumping reuse water out of an old sewer pond. The client wants no, if possible, disturbance to the...
I have been called to help troubleshoot some unusually high pressures in a fire line. The fire line experiences intermittent pressures (anectdotally from the client) on the order of 260 psi, which is about 70 psi higher than the storage tank at the top of the system. There is a PRV between the...
I am specifying a large (for me...20" ID) transmission line through what will in the foreseeable future be the back yard of residential lots. My gut impression is that fused pipe, vs bell and spigot, will be less prone to leaks that could upset the future homeowners. Does anybody have...
We have a client with a 2700 gpm well that produces water with a strong "rotten egg" smell at the source and a "musty" smell in the distribution system. What technologies are availabel to treat the water? We've completed some rudimentary tests with chlorox and it would take about 5 ppm Cl2 to...
I need to specify meters, encoders and radios for a municipality that currently has no meters in it. I'm leaning towards positive displacement meters with absolute encoders and a spread-spectrum radio (one-way). Would anyone out there share with me your experience, good or bad, on AMR systems...
I am to specify new meters for a municipal client that currently does not have any meters in their system. They, like every client, have a limited budget, but want the best product they can get, and I am inexperienced when it comes to residential meters. They want a radio frequency AMR system...
