WHAT IS A SELF PRIMING PUMP?
A self priming pump is like any other centrifugal pump, but it is designed with an external casing that “floods” the inner pump or volute. The casing is filled with liquid [usually the same as the liquid to be pumped] and the pump is ready to go. When the impeller rotates in the casing, a low pressure area is formed at the eye of the impeller. Because the pressure is lower than atmosphere, water is pushed up the suction pipe by atmospheric pressure, forcing all the air in the suction line into the pump. The self priming pump mixes the air with the recirculating water in the casing. The air separates from the liquid and is discharged from the casing. When all the air in the suction line has been displaced, the pump is dynamic and delivers flow like any other centrifugal pump.

Pump Maintenance Videos:
Watch instructional videos here showing how simple the maintenance activities are for Gorman-Rupp surface mounted self-priming pumps:
INTRODUCTION AND SAFETY
BACK COVER AND WEAR PLATE REMOVAL
SUCTION CHECK VALVE REMOVAL
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Self-Priming Pumps:
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The Gorman-Rupp Super T Series self-priming centrifugal wastewater/sewage pump has been the world benchmark for this technology since 1963 (>50 years). They have been designed for economical, trouble-free operation, with superior solids handling capability and a large inspection cover to access pump internals for service or blockage removal.
Advantages include:
- Self-Priming pump has the ability to mount high and dry above the wet well (not in it)
- Low cost of ownership
- Greatly reduced OH&S issues – no more working over water/heights/cranes/heavy swinging weights
- Surface-mounted pumps with easy access for monitoring or service
- Advanced safety features including pressure relief valve to protect operators
- Improved maintenance features to greatly reduce maintenance time and costs, with removable rotating assembly
- A variety of materials of construction to handle abrasive and/or corrosive fluids
The Gorman-Rupp Super T Series sewage and wastewater pumps with Eradicator™ Solids Management System are a series of self-priming centrifugal pumps designed specifically for handling municipal and industrial wastewater containing stringy, difficult to pump, solids in suspension (such as wet wipes, rags and feathers).
They have been designed for economical, trouble-free operation, with design features that deliver superior solids handling capability and a large inspection cover to access pump internals for service or blockage removal. Gorman-Rupp Super T Series wastewater and sewage pumps have been used for pumping of WAS and RAS and for digester recirculation with great success in wastewater treatment plants around the country, as well as food process plants, paper mills and other heavy industries. The Eradicator™ system advances the solids handling capabilities of this range.
Advantages include:
- Ability to mount high and dry above the wet well [not in it]
- Low cost of ownership
- Greatly reduced OH&S issues
- Easy access for monitoring or service
- Advanced safety features to protect operators
- Improved maintenance features to greatly reduce maintenance time and costs, with removable rotating assembly
- A variety of materials of construction to handle abrasive and/or corrosive fluids
The Gorman-Rupp Ultra V Series solids handling sewage and wastewater pumps with Eradicator™ Solids Management System are a series of self-priming centrifugal pumps designed specifically for handling municipal and industrial wastewater containing stringy, difficult to pump, solids in suspension (such as “wet wipes” , rags and feathers).
They have been designed for economical, trouble-free operation, with design features that deliver superior solids handling capability and a large inspection cover to access pump internals for service or blockage removal. Gorman-Rupp Ultra V Series wastewater and sewage pumps have been used for pumping of WAS and RAS and for digester recirculation with great success in wastewater treatment plants around the country, as well as food process plants, paper mills and other heavy industries. The Eradicator™ system advances the solids handling capabilities of this range.
Advantages include:
- Ability to mount high and dry above the wet well [not in it]
- Low cost of ownership
- Greatly reduced OH&S issues
- Easy access for monitoring or service
- Advanced safety features to protect operators
- Improved maintenance features to greatly reduce maintenance time and costs, with removable rotating assembly
- A variety of materials of construction to handle abrasive and/or corrosive fluids
Ask Our Team
The Gorman-Rupp Super U Series self priming dewatering and grey water pumps combines the best features of quality trash pumps in Australia with increased fuel efficiency and higher heads to pump through smaller and/or longer discharge piping systems or overcome the losses in filter systems.
These centrifugal pumps have been designed for economical, heavy duty (24/7) trouble-free operation.
Advantages include:
- Ability to mount high and dry above the water (not in it)(to 7.6m)
- Low cost of ownership
- Greatly reduced OH&S issues
- Easy access for monitoring or service
- Advanced safety features to protect operators
- Improved maintenance features to greatly reduce maintenance time and costs, with removable rotating assembly
- A variety of materials of construction to handle abrasive and/or corrosive fluids
- Any engine brand required by the customer
- Choice of skid or trailer mounted configuration
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The Gorman-Rupp 10 Series grey water pump range of self priming centrifugal pumps and effluent pumps have been delivering excellent service to industry since 1946. With large inspection cover to access pump internals for service or blockage removal and a very thick vaned solids handling impeller, the 10 Series grey water pump are the choice for many such as abattoir, concrete batch plant or chemical plant.
10 Series Grey water pump advantages:
- Ability to mount high and dry above the wet well [not in it]
- Capital cost savings over wet well/ dry well constructions
- Low cost of ownership
- Greatly reduced OH&S issues
- Easy access for monitoring or service
- Improved maintenance features to greatly reduce maintenance time and costs
- A variety of materials of construction to handle abrasive and/or corrosive fluids
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Hydro Innovations is proud to be the sole distributor of EDUR pumps in Australia.
EDUR is a leading German pump manufacturing company, specialising in high-quality industrial centrifugal pumps. EDUR produces pumps for industries such as the food process industry and the municipal industry. Their pumps are customised to suit a range of applications including hot and cold water pumping, wastewater, LPG pumping, dissolved air flotation and refrigerant pumping.