Submersible Pumps for Septic Tanks and Wastewater Treatment Systems

Biological wastewater treatment systems such as SBR (sequence batch reactor) and Fixed-bed (reactor) Wastewater Treatment are the norm for decentralised remote wastewater treatment. While modern biological wastewater treatment systems operate with a combination of sedimentation stages and oxygen-input to achieve the highest treatment levels, septic tanks operate only by means of staged sedimentation.

The treated wastewater within the final chamber, also referred to as effluent, is in a functioning treatment system or septic tank free from solids and discolouration with saturated raw sewage elements.
This relatively clear effluent can then be discharged towards the percolation area, where the natural infiltration within an underground gravel-bed as well as lower lying soil- & ground-layers further cleanse the effluent water before it reaches the groundwater reservoir.

Every private dwelling and commercial building not connected to the municipal sewerage network is obliged to adequately treat raw sewage and wastewater in a decentralised remote wastewater treatment system or septic tank.

Why is a submersible pump necessary within a septic tank or wastewater treatment system?

Unless the site landscaping conditions allow the final chamber to naturally overflow towards the percolation area or subsoil polishing-filter, a submersible wastewater pump is required to discharge the treated effluent. Reoccurring level-controlled discharge of the final chamber ensures the wastewater treatment system or septic tank can operate without any backlog or overflowing.

Pumps for septic tanks / treatment systems with Float Switch

Most submersible sump pumps installed in a septic tank or wastewater treatment system are equipped with a float switch, which allows the pump to switch ON/OFF fully automatically according to the level within the final effluent chamber.

Pumps for septic tanks / treatment systems without Float Switch

Some wastewater treatment systems could be equipped with a control panel, which switches the pump directly (not common in Ireland or Northern Ireland). In these cases, a pump without a float-switch is required.
Usually, an external device (float switch or similar) is connected to the panel, which then prompts the panel to switch the submersible pump level-controlled. The advantage of such a setup is that the panel could also monitor operational-hours and switching-cycles of the pump.


As the majority of wastewater treatment systems and septic tanks are located at private domestic facilities and small commercial locations, most submersible wastewater pumps used at these installations are in single-phase (230V/50Hz). Some commercial systems with greater volume demand may however be equipped with submersible pumps in three-phase (400V/50Hz).

GUIDE – Wastewater Treatment Systems

Biological wastewater treatment systems such as SBR (sequence batch reactor) and Fixed-bed (reactor) Wastewater Treatment are the norm for decentralised remote wastewater treatment. While modern... read more »
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Submersible Pumps for Septic Tanks and Wastewater Treatment Systems

Biological wastewater treatment systems such as SBR (sequence batch reactor) and Fixed-bed (reactor) Wastewater Treatment are the norm for decentralised remote wastewater treatment. While modern biological wastewater treatment systems operate with a combination of sedimentation stages and oxygen-input to achieve the highest treatment levels, septic tanks operate only by means of staged sedimentation.

The treated wastewater within the final chamber, also referred to as effluent, is in a functioning treatment system or septic tank free from solids and discolouration with saturated raw sewage elements.
This relatively clear effluent can then be discharged towards the percolation area, where the natural infiltration within an underground gravel-bed as well as lower lying soil- & ground-layers further cleanse the effluent water before it reaches the groundwater reservoir.

Every private dwelling and commercial building not connected to the municipal sewerage network is obliged to adequately treat raw sewage and wastewater in a decentralised remote wastewater treatment system or septic tank.

Why is a submersible pump necessary within a septic tank or wastewater treatment system?

Unless the site landscaping conditions allow the final chamber to naturally overflow towards the percolation area or subsoil polishing-filter, a submersible wastewater pump is required to discharge the treated effluent. Reoccurring level-controlled discharge of the final chamber ensures the wastewater treatment system or septic tank can operate without any backlog or overflowing.

Pumps for septic tanks / treatment systems with Float Switch

Most submersible sump pumps installed in a septic tank or wastewater treatment system are equipped with a float switch, which allows the pump to switch ON/OFF fully automatically according to the level within the final effluent chamber.

Pumps for septic tanks / treatment systems without Float Switch

Some wastewater treatment systems could be equipped with a control panel, which switches the pump directly (not common in Ireland or Northern Ireland). In these cases, a pump without a float-switch is required.
Usually, an external device (float switch or similar) is connected to the panel, which then prompts the panel to switch the submersible pump level-controlled. The advantage of such a setup is that the panel could also monitor operational-hours and switching-cycles of the pump.


As the majority of wastewater treatment systems and septic tanks are located at private domestic facilities and small commercial locations, most submersible wastewater pumps used at these installations are in single-phase (230V/50Hz). Some commercial systems with greater volume demand may however be equipped with submersible pumps in three-phase (400V/50Hz).

GUIDE – Wastewater Treatment Systems

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GEMAT 430 NS Submersible Effluent Pump GEMAT 430 NS
From €199.90 * €293.97 *
excl. VAT: €162.52 VAT: €37.38 *
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EBARA OPTIMA MA Pump EBARA OPTIMA MA
From €203.88 * €318.57 *
excl. VAT: €165.76 VAT: €38.12 *
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EBARA RIGHT 75 MA Pump EBARA RIGHT 75 MA
From €374.39 * €656.82 *
excl. VAT: €304.38 VAT: €70.01 *
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EBARA RIGHT 100 MA Pump EBARA RIGHT 100 MA
From €405.21 * €698.64 *
excl. VAT: €329.44 VAT: €75.77 *
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EBARA BEST ONE MA Pump EBARA BEST ONE MA
From €291.82 * €448.95 *
excl. VAT: €237.25 VAT: €54.57 *
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EBARA BEST 2 MA Pump EBARA BEST 2 MA
From €458.32 * €739.23 *
excl. VAT: €372.62 VAT: €85.70 *
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EBARA BEST 4 MA Pump EBARA BEST 4 MA
From €704.05 * €1,173.42 *
excl. VAT: €572.40 VAT: €131.65 *
EBARA OPTIMA M Pump EBARA OPTIMA M
From €195.88 * €301.35 *
excl. VAT: €159.25 VAT: €36.63 *
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GEMAT 430 NS Submersible Effluent Pump
GEMAT 430 NS
The GEMAT 430 NS is a stainless-steel submersible pump to discharge treated effluent from wastewater treatment systems and septic tanks to the percolation area.
From €199.90 * €293.97 *
excl. VAT: €162.52 VAT: €37.38 *
Hint!
EBARA OPTIMA MA Pump
EBARA OPTIMA MA
The Ebara Optima MA is a single-phase (230V) submersible pump with automatic float-switch and a pumping capacity of up to 150 litres per minute. The EBARA OPTIMA MA has replaced the previous pump model EBARA BEST ZERO MA.
From €203.88 * €318.57 *
excl. VAT: €165.76 VAT: €38.12 *
GEMAT 500 NS submersible pump | 230V-1Phase-50Hz
GEMAT 500 NS
The GEMAT 500 NS is a single-phase (230V) submersible pump in polycarbonate with automatic float-switch and a pumping capacity of up to 150 litres per minute. It is used for general drainage, sump chmabers and effluent discharge from...
From €123.86 * €233.70 *
excl. VAT: €100.70 VAT: €23.16 *
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EBARA BEST ONE MA Pump
EBARA BEST ONE MA
The Ebara Best One MA is a single-phase (230V) submersible pump with automatic float-switch and a pumping capacity of up to 170 litres per minute.
From €291.82 * €448.95 *
excl. VAT: €237.25 VAT: €54.57 *
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EBARA RIGHT 75 MA Pump
EBARA RIGHT 75 MA
The EBARA Right 75 MA is a single-phase (voltage: 230V) submersible pump with automatic float-switch for drainage & wastewater sump chambers with a solids passage of 35mm and a maximum volume capacity of 240 litres per minute.
From €374.39 * €656.82 *
excl. VAT: €304.38 VAT: €70.01 *
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EBARA RIGHT 100 MA Pump
EBARA RIGHT 100 MA
The EBARA Right 100 MA is a single-phase (voltage: 230V) submersible pump with automatic float-switch for drainage & wastewater sump chambers with a solids passage of 35mm and a maximum volume capacity of 300 litres per minute.
From €405.21 * €698.64 *
excl. VAT: €329.44 VAT: €75.77 *
Hint!
EBARA BEST 2 MA Pump
EBARA BEST 2 MA
The EBARA BEST 2 MA is a single-phase (voltage: 230V) submersible pump with automatic float-switch and a volume capacity of 260 litres per minute.
From €458.32 * €739.23 *
excl. VAT: €372.62 VAT: €85.70 *
EBARA BEST 3 MA Pump
EBARA BEST 3 MA
The EBARA BEST 3 MA is a single-phase (voltage: 230V) submersible pump with automatic float-switch and a volume capacity of 280 litres per minute.
From €573.43 * €955.71 *
excl. VAT: €466.20 VAT: €107.23 *
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EBARA BEST 4 MA Pump
EBARA BEST 4 MA
The EBARA BEST 4 MA is a single-phase (voltage: 230V) submersible pump with automatic float-switch for sump chambers with clear & drainage-water as well as soiled effluent wastewater. The maximum volume capacity is 330 litres per minute.
From €704.05 * €1,173.42 *
excl. VAT: €572.40 VAT: €131.65 *
EBARA OPTIMA M Pump
EBARA OPTIMA M
The Ebara Optima M is a single-phase (230V) submersible drainage & wastewater sump pump with a pumping capacity of up to 150 litres per minute. The EBARA OPTIMA M has replaced the previous pump model EBARA BEST ZERO M.
From €195.88 * €301.35 *
excl. VAT: €159.25 VAT: €36.63 *
EBARA BEST ONE M Pump
EBARA BEST ONE M
The Ebara Best One M is a single-phase (230V) submersible drainage & wastewater sump pump with a pumping capacity of up to 170 litres per minute.
From €278.23 * €428.04 *
excl. VAT: €226.20 VAT: €52.03 *
EBARA RIGHT 75 M Pump
EBARA RIGHT 75 M
The EBARA Right 75 M is a single-phase (voltage: 230V) submersible pump for drainage & wastewater sump chambers with a solids passage of 35mm and a maximum volume capacity of 240 litres per minute.
From €368.83 * €635.91 *
excl. VAT: €299.86 VAT: €68.97 *
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