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Pump installation kits for Retrofit

Submersible pumps for installation in an existing collecting tank

Whether in a new building or during renovations – it is possible to use a collecting tank already available on site, for example a tank made of concrete. The Retrofit pump installation kits, each with two removable pumps, are the ideal solution that can be retrofitted for stationary use. Suitable for wastewater with or without sewage, equipped with various impellers, such as a multi-vane vortex impeller, channel-type impeller or macerator and available with different pump capacities ranging from 0.6 kW to 3.7 kW: Due to this large variety of models, there is a suitable version for every requirement profile. A resistant version that is resistant to hot water and brine is available on request.

Pump installation kit for wet installation in a collecting tank on site
Installation kit for Retrofit in a concrete chamber on site
Pump installation kit for wet installation in a collecting tank on site
Installation kit for Retrofit in a concrete chamber on site
Pump installation kit for Retrofit S Duo GTF 500 for wet installation in a collecting tank on site
Pump installation kit for Retrofit S Duo GTF 1000 for wet installation in a collecting tank on site

Possible applications

The Retrofit S pump installation kit is a versatile solution for various drainage requirements. It is used in particular for drainage in underground car parks, lift shafts and basements.


Easy maintenance

Maintenance or cleaning needs to be carried out on a part at a later date? No problem. All maintenance components of the pump installation kits are easily accessible. This significantly increases the lifespan of the product.

Twice the power

Two pumps are integrated into the Retrofit pump installation kits for fail-safe operation. A choice of pumps ranging from 0.6 kW to 3.7 kW is available depending on the amount of wastewater generated.

Brand quality from Germany

40 years ago, we established polymer as a building material in drainage systems. Thanks to our many years of experience and our excellent technical know-how, we offer genuine premium quality made in Germany with every KESSEL product.

Simple installation

Whether PE, PVC or a thread made of stainless steel – regardless of the material, all common pressure pipes can be easily connected to the Retrofit S. Particularly practical: The pump can be easily locked with a one-handed closure.

Retrofit pumping station up to 1.25 kW


Twin pump station

  PumpType of wastewaterImpeller typeControl unitAlarm sensor Item no.  
8744000 GTF 600 without sewage Multi-vane impeller Comfort optical probe 8744000
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8744002 without sewage Multi-vane impeller Comfort optical probe 8744002
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8744004 without sewage Multi-vane impeller Comfort optical probe 8744004
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8744006 without sewage Multi-vane impeller Comfort optical probe 8744006
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  PumpType of wastewaterImpeller typeControl unitAlarm sensor Item no.  
8744001 GTF 600 without sewage Multi-vane impeller Comfort Float switch 8744001
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8744003 GTF 1000 without sewage Multi-vane impeller Comfort Float switch 8744003
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8744005 GTF 1200 without sewage Multi-vane impeller Comfort Float switch 8744005
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8744007 GTF 1250 without sewage Multi-vane impeller Comfort Float switch 8744007
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Retrofit pumping station from 1.3 kW


Twin pump station

  PumpType of wastewaterImpeller typeControl unitAlarm sensor Item no.  
8744010 STZ 1300 for wastewater with and without sewage Macerator Comfort Level sensor 8744010
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8744012 STZ 2500 for wastewater with and without sewage Macerator Comfort Level sensor 8744012
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8744014 STZ 3700 for wastewater with and without sewage Macerator Comfort Level sensor 8744014
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  PumpType of wastewaterImpeller typeControl unitAlarm sensor Item no.  
8744020 GTF 1400 for wastewater with or without sewage (in installation situations without ATEX requirements) Multi-vane impeller Comfort Level sensor 8744020
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8744022 GTF 1600 for wastewater with or without sewage (in installation situations without ATEX requirements) Multi-vane impeller Comfort Level sensor 8744022
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8744024 GTF 2600 for wastewater with or without sewage (in installation situations without ATEX requirements) Multi-vane impeller Comfort Level sensor 8744024
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8744026 GTF 4000 for wastewater with or without sewage (in installation situations without ATEX requirements) Multi-vane impeller Comfort Level sensor 8744026
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  PumpType of wastewaterImpeller typeControl unitAlarm sensor Item no.  
8744030 GTK 1300 for wastewater with or without sewage (in installation situations without ATEX requirements) Single-vane impeller Comfort Level sensor 8744030
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8744032 GTK 2600 for wastewater with or without sewage (in installation situations without ATEX requirements) Single-vane impeller Comfort Level sensor 8744032
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8744034 GTK 3700 for wastewater with or without sewage (in installation situations without ATEX requirements) Single-vane impeller Comfort Level sensor 8744034
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