Effluent Pump: An effluent pump is typically used in septic tank applications. Effluent is the gray wastewater that remains after the solids settle out. You can use the Effluent Pump Sizing Form to find the right effluent pump for your application.
[ Return to Top ]What is the difference between a sewage pump and a grinder pump?
A sewage pump passes wastewater with solids through the discharge line without cutting or grinding them. A grinder pump cuts the solids and then passes the resulting slurry through the discharge pipe. Grinder pumps are typically used in commercial applications, where local code mandates that one be used, or in high-head or long-distance applications.
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Should I add a high-level alarm to my system?
A high-level alarm is used to alert the homeowner if the liquid inside the tank of a pump system reaches a level that is higher than it would be if the pump were operating normally or if the liquid inflow were greater than the maximum pumping capacity of the pump. Liberty’s alarms can either be purchased separately or as part of a pre-assembled package. They can be used in sump, sewage, or effluent applications. To see additional information on our alarms, please click here.
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Can I use an automatic or mechanical vent device with a Liberty system?
An automatic or mechanical vent device can not be used since this type of vent typically allows air to pass only one way. Pump systems require venting in both directions. The system must be vented directly to the atmosphere in accordance with national and local plumbing codes (Please note that sump pumps do not require vents). Using these types of vents may cause improper drainage of the fixture or affect pump cycling.
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What size sewage basin do I need?
The size of the basin that you need depends on the number of fixtures that will be draining into it. Please refer to our sewage pump sizing form for help in determining the most appropriate size for your application. Please note that local codes may dictate minimum basin size.
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What type of battery do you recommend for use in the Model 441 (battery back-up sump pump)?
We recommend using a deep-cycle marine type battery (27M) for best performance. However, a standard 12V automobile battery may also be used. In either case, please be sure the battery is fully charged before installing it in the battery case.
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If I need to replace the oil in my pump, what type should I use?
Liberty submersible pumps are hermetically sealed and permanently lubricated. Typically, they should never require the addition or replacement of oil. However, in the case of a significant repair where oil has been lost, the pump oil should be replaced with ISO30 turbine oil (which can be purchased through most motor repair shops). As an alternative, synthetic 5W30 motor oil may be used. The amount of oil in the unit should be just enough to cover the motor windings, however, there should be enough room left in the pump casing to allow for expansion when the oil heats up.
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How can I purchase replacement parts?
Liberty products and replacement parts are sold through plumbing distributors. To find a distributor in your local area, please refer to our distributor-locator. Replacement parts can also be ordered directly from the factory by calling 1-800-543-2550 or through the
Parts Area of the website.
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What is a pump performance curve?
A pump performance curve is a tool used to show the gallons per minute that a given pump model is capable of pumping over a range of total dynamic head measurements. A performance curve is used to determine the correct pump size for a specific application.
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What does "shut-off head" mean?
Shut-off head refers to the highest point the pump will lift fluid. At this point the pump will pump 0 gallons per minute. It’s often used as a reference point to compare different pump models.
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What is TDH (Total Dynamic Head)?
TDH is a combination of two components – Static Head and Friction Head – and is expressed in feet. Static head is the actual vertical distance measured from the minimum water level in the basin to the highest point in the discharge piping. Friction head is the additional head created in the discharge system due to resistance to flow within its components. Liberty has charts available to calculate TDH. Please contact Liberty’s customer service department for proper pump sizing.
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What is the price of the system I'm interested in?
Please contact your local distributor for pricing. To find a distributor in your local area, please refer to our distributor-locator.
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