![]() The Union Pacific Bailey Yard in North Platte, NE, utilized a prefabricated sewage system to meet a tight schedule of 12 hours to remove the old system and install the new system. Outside Installations When space requires basins to be located outside of the building, self-priming pumps and controls can be located above the wet-well in a weatherproof enclosure, or submersible pumps can be used with a weatherproof control enclosure. ![]() If the flow required is increased, then the pumps should be replaced with larger size pumps. This would include checking for infiltration into the piping or the basin. If the high water alarm activates on a regular basis, the design professional should take a closer look at the system. The second pump should be started on a high level, along with an alarm to prevent flooding. ![]() This is adjusted by the distance between the off and on levels set in the wet-well. As mentioned earlier, the number of starts per hour on a motor should be limited to six. When the alarm signals a mechanical seal failure, the pump should be serviced as soon as possible to prevent water from entering the motor through the secondary seal.įor larger pumps and motors, bearing temperature sensors should be utilized to catch bearing failures before the pump or motor experiences major failure. Many manufacturers of submersible pumps use a hardened face on the primary seals and standard faces on the secondary seals. ![]() With a double mechanical seal on submersible pumps as standard, if the first seal fails, the motor continues to be unaffected. For submersible motors, providing a seal failure alarm can mean the difference between a simple mechanical seal change or an entire motor rewind. In reality, they are one of the most important components of a sewage and sump system. Site installation of the system was also simplified, allowing the contractor to mount the skid, attach piping and bring a single power feed to the control panel.įigure 4 Motor Controls Controls for pump systems are often minimized in their importance. With two self-priming pumps and controls mounted on a common skid, the entire system was able to be factory-tested for performance and integration. The WWII Memorial is located at the reflection pool between the Washington and Lincoln Memorials. The National World War II Memorial in Washington, DC, utilized a packaged sewage system in the handling of the sewage for the public restrooms. Even for sump duty, a non-clog solids-handling impeller is recommended, as debris can make its way into these pits. Submersible pump systems are good for deep wet-wells. A typical duplex self-priming pump system for sewage or sump duty is easy to unclog if large debris gets stuck inside the pump. Basement/Inside Applications Basins inside of building basements can be supplied with a simple steel cover that allows for mounting of pipes, vents, controls and access plates.
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