![]() ![]() SPD pumps constantly scour the lines to prevent buildup because flow is maintained although pressure or head increased, effectively scouring the pipe.Necessary cookies are absolutely essential for the website to function properly. When deposition of solids occurs, tending to block the pipe, centrifugal pumps will move toward shut off, reducing flow and velocity and increasing the tendency to block the pipe. The performance characteristics of SPD pumps assist in maintaining a sewer network free from blockages. SPD grinder pumps are crucial to the success operation of a pressure sewer system. The predictable flows of the SPD pumps provide tolerance of widely varying system pressures. Visit the Product Catalog for the available tank capacities, tank materials and GPD ratings.Į/One's grinder pump lends itself to complex system designs because of its nearly vertical pump curve and the resulting nearly identical flow rate allows a wide variety of discharge heads. All grinder pump stations use the 1 hp Extreme Series pump. Pumps & Systems magazine featured an article about SPD pumps for pressure sewer systems that compares SPD and centrifugal pumps.Į/One offers grinder pump stations for residential (simplex stations) and light commercial (duplex through quadplex stations) applications. E/One's semi-positive displacement (SPD) grinder pump was developed for wastewater applications. It enables the engineer to minimize retention time, pump wear and deep scouring action at effective levels. What is the difference between E/One's grinder pump and centrifugal pumps? Why is an SPD pump important in a pressure sewer system?Ĭonstant, predictable pump output is the foundation for proper hydraulic design.E/One avoids using fixture counts because, in our experience, flow is typically overestimated and results in an oversized system. This estimates flow based on intended use of the site and the intended occupancy. E/One typically uses known/estimated flow from the Table H 201.1 (4) from 2021 UPC Appendix H. Commercial grinder pump station sizing considers many of the same factors as residential appliations, especially total daily flow. Sizing E/One grinder pump stations for non-residential and commercial applications is more complex. Contact your local distributor for help choosing what is best for your region and need. The most popular residential E/One grinder pump station is the DH071. A grinder pump station is located at each home and is sized to accommodate the home. The most common application for pressure sewer systems is single-family, residential applications. Regulatory guidelines (local, regional, or national) ![]() Expected total daily flow (not the number of water-using fixtures) Residential or non-residential/commercial application Station sizing takes many factors into consideration including: Visit the Design Center or contact E/One if you need further assistance.Į/One manufactures one grinder pump that is available with a number of different tank sizes. The following are basic guidelines for station sizing. Sizing and selecting an appropriate grinder pump station is important for ensuring long life of the pump. What should I do if the alarm on my grinder pump goes off or the grinder pump red light stays on?.Never silence the alarm and continue using water if your pump is not working you will cause a backup or overflow and possibly damage the pump. Discontinue water use to avoid causing a backup or overflow. ![]() If the alarm doesn't turn off, call for service.Īn alarm will occur if the pump has stopped working and wastewater in the tank rises above the pump's alarm level. We call this a "nuisance alarm." Frequent nuisance alarms during normal water usage (showers, washing machine, etc) may indicate that the pump is having trouble "keeping up" with pumping and needs service.Ī nuisance alarm may also occur after a power outage: wastewater may be above the pump’s alarm level and the pump needs a few minutes to pump down the tank to a normal level. After the pump "catches up," the alarm turns off by itself and does not turn on again. The alarm on your grinder pump station will sound when the wastewater in the tank reaches a certain level ("alarm level").Īn alarm may occur if a large amount of water goes into the tank and rises above the pump's alarm level, such as emptying a large whirlpool bathtub.
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