A backwater chamber in front of the building offers significant advantages. It enables all drainage points that are at risk of backwater to be safeguarded outside the building at a single central and maintenance-friendly point.
Modular backwater chambers consist of a technical module and a chamber module. These are available in different heights and therefore allow an exact adaptation to the individual circumstances.
Modular backwater chambers are available for different installation depths up to 3,348 mm, with upper sections made of grey iron or stainless steel and for different load classes.
The modular design allows subsequent installation of backwater valves (Staufix SWA, Staufix FKA) and the Pumpfix F backwater pumping station. The polymer construction is permanently leak-proof, root-resistant, and impact-resistant, and the system eliminates noise nuisance from pumps while causing no loss of living space inside the building.
Features & benefits
- Modular design consisting of a technical module and a chamber module
- Available for installation depths up to 3,348 mm
- Frost-free installation up to 3,000 mm depth
- Upper sections available in grey iron or stainless steel
- Multiple load class variants available
- Backwater valves (Staufix SWA, Staufix FKA) and Pumpfix F can be retrofitted subsequently
- Central safeguarding of all drainage points at risk of backwater at a single external point
- Covers roof, courtyard, and building drainage at one location
- Eliminates noise nuisance from pumps inside the building
- No loss of living space inside the building
- Permanent leak-proof polymer construction
- Root-resistant material
- Impact-resistant (unbreakable) polymer material
- Precise adaptation to individual site circumstances through modular height options
Applications
- Central external backwater protection for buildings
- Safeguarding drainage points at risk of backwater outside the building
- Roof and courtyard water drainage
- Underground installation at varying depths
- Installation below floor slab level
- Retrofit installations in existing structures
Technical specifications
| Maximum installation depth | 3,348 mm |
|---|---|
| Frost-free installation depth | up to 3,000 mm |
| Upper section materials | Grey iron or stainless steel |
| Load classes | Multiple load classes available |
| Construction | Technical module + chamber module (modular) |
| Body material | Polymer (root-resistant, impact-resistant, permanently leak-proof) |
| Available pipe diameters | DN 100, DN 125, DN 150 |
Article overview
KESSEL Controlfix backwater technical module
With closed through-channel
With closed through-channel
| Picture | Inlet nominal size (DN) | Outlet nominal size (DN) | Number of inlets | Number of outlets | Item no. | Show |
|---|---|---|---|---|---|---|
![]() | 100 | 100 | 1 | 1 | 851001 | Show 851001 |
![]() | 125 | 125 | 1 | 1 | 851251 | Show 851251 |
![]() | 150 | 150 | 1 | 1 | 851501 | Show 851501 |
With two 90° inlets in flow direction
With two 90° inlets in flow direction
| Picture | Inlet nominal size (DN) | Outlet nominal size (DN) | Number of inlets | Number of outlets | Item no. | Show |
|---|---|---|---|---|---|---|
![]() | 100 | 100 | 3 | 1 | 851003 | Show 851003 |
![]() | 125 | 125 | 3 | 1 | 851253 | Show 851253 |
![]() | 150 | 150 | 3 | 1 | 851502 | Show 851502 |





