When a plumbing system is set lower than a municipal sewer line, sewage pumps are used to pump wastewater from a collection basin up to the main sewer. In septic tank systems sewage pumps often move fluid waste
to a leach field.
Sewage pumps are designed to pump fluids containing soft solids of up to 2” in diameter. They are submersible and often controlled by float switches that activate the pump when the liquid level in the basin rises.
Sewage pumps are rated in horsepower and most models are capable of moving several thousand gallons of fluid per hour.
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How To Size a Sewage Pump
The two main factors to bear in mind when sizing a sewage pump are the volume of sewage to be pumped, generally measured in gallons per minute (gpm), and the height and distance it must be moved (head).
Gpm is determined by a pump's horsepower (hp) and will vary according to the vertical distance between the sewage basin and discharge point. In a residential application, a ½ hp pump with a high head will have a lower gpm than one with a low head.
Gpm at 20 ft. of head = 200 (gpm) means that the sewage pump can move up to 200 gallons of water per minute if the vertical distance between the sewage basin and the septic tank is 20 feet. (Gallons per hour, or gph, is an alternative measure that can be calculated by multiplying the gpm by 60.)
A sewage pump with low horsepower and gpm may cost less but if it must run constantly to meet pumping demands it may not last as long as a more powerful pump that will not have to run as often. When selecting a sewage pump you should estimate the demands you will be putting on it as closely as possible. A pump that is properly sized will result in the longest possible life.
SPECIAL FEATURES
Thermal Overload Protection is a feature that helps to extend the life of a sewage pump by automatically shutting off when the pump’s internal temperature reaches a critical level.
Packaged Sewage Pump Systems include a sewage pump, basin and piping along with all of the other components necessary for home sewage disposal bundled into one package.
For detailed specs, manuals and reviews on the sump pumps, battery back-up systems, combination systems and water powered systems we stock and ship nationally, visit our product pages at www.pumpproducts.com or call us for details: 1-800-429-0800.
The two main factors to bear in mind when sizing a sewage pump are the volume of sewage to be pumped, generally measured in gallons per minute (gpm), and the height and distance it must be moved (head).
