What is backwater?

All the outlet pipes from drainage fixtures in buildings (washing machines, showers, toilets etc.) are connected to the sewer, forming a linked pipe system. If the wastewater cannot flow freely through the sewer e.g. after heavy rainfall or due to blockages in the sewer pipes, it is pushed back into the connected outlet pipes and can flood all the areas of the house which are below the backwater level, including any fixtures and furnishings etc.

Backwater protection valves to prevent flooding of areas below the sewer line

Backwater is always possible

For economic reasons, mixed public sewage systems often cannot be dimensioned in such a way that they can deal with extremely heavy rain without any problems. For this reason, flooding of the sewer and backwater in all connected pipes must be expected during heavy rain.

In addition, backwater can occur for the following reasons:

  • Blockage, burst pipes or damage to the sewage system.
  • Pump failure, if the drainage system is connected to a pumping station.
  • High water levels in the recipient (stream or river), since rainwater cannot flow away easily from low ground.
  • Pipe blockage or diversion due to repair work.
  • Increased wastewater feed, for example when sewage systems are being rinsed, the fire brigade is in action or more pipes are connected to the sewage system than originally planned.

Installation possibilities

Exposed installation

Ideal for the renovation of old buildings which are in danger of backwater – the low-cost, clean and standard-conform solution for retrofitting backwater units. To avoid the complete wastewater pipes having to be rerouted in expensive construction work, Eurodrain recommends installing the central backwater protection unit in the existing exposed wastewater pipe. This guarantees free access to the backwater unit for maintenance work and pipe cleaning.

Installation in a concrete floor

The convenient, practical and attractive-looking version for new buildings creates additional accommodation space in the basement. High land prices often force clients who build a house on a small plot of land to use rooms in the basement to maximise the accommodation area. In addition, toilets, showers or utility rooms are often located in the basement.

The backwater protection unit is installed concealed in the floor. The easy-to-install set with a cover that can be tiled over as required can be used with a wide range of different interior styles and trends – whether the room in question is a music room, home office or sauna and spa.

Covers with a drain function for additional surface draining in an emergency (e.g. if the basement is flooded during heavy rain) provide even more safety. A special sealing set protects the basement from water pressure from below.

Eurodrain sells the Kessel Staufix backwater valve in South Africa

Underground installation

Up to now, products protecting against water penetration have mainly been installed inside buildings. In the meantime, however, new methods are available. For this, an inspection chamber is installed in front of the building where the backwater flap is installed.

If wastewater occurrence increases, the correct backwater protection unit can always be retrofitted e.g. when older residential areas are expanded or extensions are built on houses to cope with increased demand. This means clients and the local authorities are always on the safe side.

Equally, pumps and sewage lifting stations which so far have taken up a lot of space in the basement can now be installed in the chamber. Outside the building, they run quietly and reliably, and are easy to service.

KESSEL offers a number of backwater valves to solve this problem. These include

  • Premium backwater valves with mechanical or motor-driven backwater flap and pump for draining wastewater with sewage, even during backwater.
  • Classic backwater valves with mechanical backwater flaps for protection against backwater.
  • Backwater valves in chamber for underground installation. Frees up basement space by moving backwater protection to outside the house.

KESSEL backwater valves are available from EURODRAIN in South Africa. Contact EURODRAIN on info@eurodrain.com or call +27 11 701 2201 for expert advice on solving backwater problems using Staufix and Pumpfix backwater valves.

backwater backwater valves drainage Eurodrain flooding Kessel plumbing Pumpfix sewer pipe blockage sewer pipes Staufix
All EuroDrain Technology / KESSEL news
keyboard_arrow_upClever solutions for modern bathrooms
keyboard_arrow_downClever solutions for modern bathrooms

The new Ultraflat 54 and Ultraflat 79 floor drain is available from EDT Eurodrain KESSEL Technology. Lowest installation height on the market Even easier to install Even safer to use The minimum installation height makes the Ultraflat floor drain ideal for renovation work and new construction. Characterised by its very low-profile design, the bathroom drain […]

keyboard_arrow_upOil and fuel separators protect our groundwater
keyboard_arrow_downOil and fuel separators protect our groundwater

In order to protect our groundwater, it is important that oil and fuel separators are used where the rainwater or wastewater could be polluted with oils or hydrocarbons that are difficult to dissolve. It is essential to use oil/fuel separators at petrol stations, car washes, vehicle repair workshops and in fact any place where machines […]

keyboard_arrow_upKESSEL’s solutions for petrol stations
keyboard_arrow_downKESSEL’s solutions for petrol stations

Whenever light liquids such as oil and fuel are used, for example at petrol stations, garages and car washes, the groundwater is under hazardous threat.

keyboard_arrow_upPrevent damage with the Staufix backwater valve
keyboard_arrow_downPrevent damage with the Staufix backwater valve

Backwater occurs again and again. Many builders and home owners are at risk of backwater damage. Property and asset damage due to backwater and flooding has never been greater than it is today. In addition, municipalities and insurance companies do not accept any responsibility and are not liable in case of damage. Yet protection against […]

keyboard_arrow_upWhen to use a grease separator?
keyboard_arrow_downWhen to use a grease separator?

Grease separators should be installed in all locations where greases and oils from plant or animal origin are required to be removed from the wastewater stream. This applies to commercial and industrial applications, for example:

keyboard_arrow_upWhat is backwater?
keyboard_arrow_downWhat is backwater?

All the outlet pipes from drainage fixtures in buildings (washing machines, showers, toilets etc.) are connected to the sewer, forming a linked pipe system. If the wastewater cannot flow freely through the sewer e.g. after heavy rainfall or due to blockages in the sewer pipes, it is pushed back into the connected outlet pipes and […]

keyboard_arrow_upChoose EDT Eurodrain-KESSEL for hospital drainage solutions
keyboard_arrow_downChoose EDT Eurodrain-KESSEL for hospital drainage solutions

Safe and reliable draining from the basement to the roof. Powerful lifting stations take over the complete basement drainage in rooms below the backwater level, and pump wastewater from showers, toilets, washing machines or separators into the elevated public sewage system.

keyboard_arrow_upHybrid drainage systems for gravity sloped wastewater pipes
keyboard_arrow_downHybrid drainage systems for gravity sloped wastewater pipes

Current regulations recommend a lifting station for the drainage of buildings even if natural gravity drainage is available. A lifting station is, of course, a must if the collected wastewater is below public sewer level and needs to be lifted to sewer level, hence the name lifting station.

keyboard_arrow_upEcoguss® floor & parking deck drains
keyboard_arrow_downEcoguss® floor & parking deck drains

Ecoguss® is a new material that is becoming more and more accepted. Drains made from Ecoguss® combine all the advantages of polymer drains, such as low weight and no corrosion, with the advantages of cast iron drains, such as sound insulation and heat resistance, but without having to accept their specific disadvantages. For this reason, […]

keyboard_arrow_upEDT Eurodrain-KESSEL lifting stations
keyboard_arrow_downEDT Eurodrain-KESSEL lifting stations

The Aqualift F Basic lifting station is an economic solution for domestic wastewater disposal. It is designed to handle wastewater with and without sewage for free-standing installation in frost-free rooms.

keyboard_arrow_upKESSEL Ecoguss ® roof drains from Eurodrain
keyboard_arrow_downKESSEL Ecoguss ® roof drains from Eurodrain

Gravity drainage means the flat roof is drained via drains using an inclined pipe system. The pipes are partly filled with water. The maximum filling level may not be exceeded: h/d=0.7 for collecting and mains pipes and f=0.33 for downpipes.

keyboard_arrow_upKESSEL grease separator systems from EuroDrain Technology
keyboard_arrow_downKESSEL grease separator systems from EuroDrain Technology

KESSEL’s complete range of grease separator systems for free-standing installation in frost-protected rooms or for underground installation is available from EuroDrain Technology in South Africa.  

keyboard_arrow_upLighting up the shower
keyboard_arrow_downLighting up the shower

The Design Line of shower drainage products offer wall drains and shower channels that incorporate LED lighting – adding atmospheric ambience and unusual focal points to the bathroom.

keyboard_arrow_upShower drainage with style
keyboard_arrow_downShower drainage with style

Lifestyle, relaxation, water, individuality, these are all themes that are integrated into today’s modern bathroom design. Designer taps, sinks, showerheads and tiles all play a role in creating an eye-catching bathroom. To complete the package, KESSEL offers architecturally designed and German-engineered shower drains and channels in a wide range of styles and choices.

keyboard_arrow_upBackwater protection safety redefined
keyboard_arrow_downBackwater protection safety redefined

Backwater damage is a threat to millions of homeowners and builders, and never has the damage caused by flooding and backwater been as costly as today. Many builders and homeowners remain unaware of the fact that they can and must protect themselves from backwater. 

keyboard_arrow_upGrease separators for self-disposal
keyboard_arrow_downGrease separators for self-disposal

Separators for self-disposal, such as the KESSEL SE-Premium grease separator, available from Eurodrain in South Africa, work according to the principle of gravity. 

keyboard_arrow_upEDT EuroDrain-KESSEL wastewater treatment
keyboard_arrow_downEDT EuroDrain-KESSEL wastewater treatment

The InnoClean PLUS system is a decentralised wastewater treatment system which naturally treats domestic wastewater prior to release in drywells or local waters / streams. 

keyboard_arrow_upEDT EuroDrain offers KESSEL Ecoguss flat roof drains in SA
keyboard_arrow_downEDT EuroDrain offers KESSEL Ecoguss flat roof drains in SA

KESSEL has expanded its Ecoguss® drain range to include flat roof drains, over and above the parking deck, yard and roof drains that the range currently includes. The products are available from EuroDrain Technology in South Africa.