APPLICATION

Our Filtration Technique is Unique

The WISY 4-STEP Rainwater Harvesting System ensures that your rainwater will not only become clean but also stay so during the storage period. By relying on an almost vertical filter mesh, the WISY filter is self-cleaning and automatically removes dirt and debris, resulting in a minimal system maintenance.

WISY 4-STEP Rainwater System

Only Four Easy Steps To Keep Your Rainwater:

  • STEP 1: Pre-Tank Filtration
  • STEP 2: Smoothed Inflow & Distribution
  • STEP 3: Floating Suction Filter
  • STEP 4: Multisiphon Overflow

WHY RAINWATER HARVESTING & RECYCLING?

We can no longer assume that there is an endless supply of water even in countries with high average annual rainfalls, especially when taking into account:

GLOBAL WARMING

  • Shrinking of mountain glaciers threatens drinking water supply for millions of people
  • Loss of mountain snowpack and earlier spring snowmelt spurred by higher temperatures reduce availability of drinking water
  • Sea-level rise can lead to saltwater intrusion into groundwater drinking

CHANGE IN WEATHER PATTERNS

  • Municipal sewer systems may overflow during extreme rain fall events, gushing untreated sewage into drinking water supplies
  • Damages to water supply systems during flooding
  • Wet places tend to get wetter and dry places drier in a warming world

INCREASING WATER CONSUMPTION

  • Municipal sewer systems may overflow during extreme rain fall events, gushing untreated sewage into drinking water supplies
  • With 220 – 250 litres of water per person daily, Malaysia has one of the highest water consumption in South East Asia.
  • Only 30 % of consummated water in Malaysia is used for actual consumption

Therefore, we have to find new ways of how to reduce, reuse and retain water. This is where rainwater harvesting and recycling comes into the picture.

ADVANTAGE OF RAINWATER


Rainwater harvesting systems allow us to achieve a sustainable future with a better environment. Collected and filtered rainwater can be safely used for e.g.:

Toilet Flushing & Urinals

Irrigation

Laundry Washing

Vehicle Washing & General Cleaning

Livestock Breeding & Farming

Industrial & Commercial Applications

When substituting municipal water with rainwater for non-potable usage the amount of municipal water used can decrease up to 50 % and by this, the water bill is reduced greatly with the usage of rainwater.

Moreover, a rainwater harvesting system is a good form of water supply during water rationing or interruption of water supply. By harvesting rainwater, chances of flash flood are reduced as rainwater run-off and thus the system can be formed as part of the rainwater management scheme.

CATCHMENT AREAS


Rainwater can be harvested from:

Roof Areas

Podium

Surface Run-Off

The catchment area is very dependable on the usage of harvested rainwater and also the requirements of the local council. The quality of harvested rainwater is affected by the catchment area as well. Rainwater harvested from roof catchment will be of higher quality compared to surface run-off, due to lower human activity.



RAINWATER HARVESTING WITH WISY PRODUCTS - MADE IN GERMANY


WISY is the pioneer and one of the leading suppliers of rainwater harvesting systems. The beauty of our system is that it emphasizes minimal and optional maintenance, minimal or no power consumption and efficient rainwater collection and management by using the WISY 4-Step Rainwater Harvesting System.

INCREASING WATER CONSUMPTION


Rainwater can be harvested from:

  • Freshwater withdrawals have tripled over the last 50 years and the demand for freshwater is increasing by 64 billion cubic meters a year (1 cubic meter = 1,000 litres)
  • Water consumption is increasing, primarily due to:
    • worldwide population growth
    • urbanization of countries around the globe
    • increase in the quality of life

AREAS OF APPLICATION

Toilet Flushing & Urinals

Thanks to the absence of calcium and magnesium in rainwater, your toilet cistern will no longer be harmed by the problem colloquially termed "limescale". The seal in the cistern remains intact - limescale deposits can damage the seal causing a continuous trickle of water into the toilet pan. Last but not least, by using rainwater, you are refusing to be one of those people who flush perfectly good drinking water down the toilet.

REFERENCES FOR TOILET FLUSHING & URINALS

Maracanã-Stadium | Brazil

Ikea | Swiss

Eiffel Palace | Hungary

Irrigation

Rainwater is extremely soft and does not leave any limescale deposits in irrigation or supply lines. Independent of the watering technology like sprinkling, drop or underground irrigation. Nozzles do not get blocked by limescale and decalcification equipment is not needed.

What is more, rainwater does not contain any chemical or hormone residues of the kind found in inadequately treated wastewater or in water polluted by agriculture. Increasing levels of both these pollutants are now being detected in groundwater

When it comes to growing plants, rainwater offers an intelligent alternative to other water resources. It can be harvested in large quantities from the roof areas connected to the rainwater harvesting system.

REFERENCES FOR IRRIGATION

Maracanã-Stadium | Brazil

St. Paul Saints Baseball Field | USA

Football World Cup Stadium | South Korea

Laundry Washing

Rainwater is inherently soft and free of calcium and magnesium, properties that make it ideal for laundry processes: there is no need to add any water or fabric conditioner - your washing comes out soft and easy to iron. Calcium deposits which make textile fibres feel stiff and rough are a thing of the past. And the washing machine is better protected as well - using rainwater completely eliminates those mineral deposits which lead to higher power consumption and may damage the washing machine.

Using rainwater to do the laundry is hygienically safe provided that the rainwater harvesting system has been professionally planned in accordance with DIN 1989. Some people who suffer from allergies even prefer rainwater because their skin reacts to the chlorine that is often added to mains water as a disinfectant.

REFERENCES FOR LAUNDRY WASHING

Kramer Family Home | Germany

Vehicle Washing & General Cleaning

Due to its softness as well as the absence of calcium and magnesium, rainwater is ideal for the washing process of cars, buses and other vehicles like trains. It is widely used in vehicle washing plants in order to save on municipal water usage and to benefit from the highlighted advantages of rainwater.

Furthermore, you can use rainwater for cleaning and wiping surfaces. You can cut down your use of cleaning agents and your cleaned surfaces will be sparkling and "streak-free" when they are dry.

REFERENCES FOR VEHICLE WASHING & GENERAL CLEANING

Hohenzollerische Railway | Germany

Kramer Family Home | Germany

Bus Washing Plant | Germany

Livestock Breeding & Farming

Animals need high-quality drinking water. Livestock farmers also need water to clean barns, stables and machinery. Or it maintains the shock-absorption surfaces in equestrian arenas. When it comes to keeping livestock, rainwater offers an intelligent alternative to other water resources. It can be harvested in large quantities from the roof areas connected to the rainwater harvesting system.

It is extremely soft and does not leave any limescale deposits in the supply lines. Nozzles do not get blocked by limescale, and decalcification equipment is not needed. What is more, rainwater does not contain any chemical or hormone residues of the kind found in inadequately treated wastewater or in water polluted by agriculture. Increasing levels of both these pollutants are now being detected in groundwater.

REFERENCES FOR LIVESTOCK BREEDING & FARMING

Taipei City Zoo | Taiwan

Poultry & Cattle Ranch | USA

Farm “Aussiedlerhof Tolle” | Germany

Industrial & Commercial Applications

Freely available rainwater with its low mineral content can be used to real advantage in production and processing operations. It is not only available at no cost, but also offers technical benefits: Rainwater is low in dissolved minerals and therefore inherently soft - it leaves very low levels, if any, of mineral deposits or residues in the process equipment in which it is used. In many cases, there is no need to install any water softening equipment at all.

For these reasons, an increasing number of companies are installing systems for harvesting rainwater to use in their processes. Wherever large roof areas are available and there is a need for large quantities of soft process water, the possibility of harvesting rainwater should be considered.

Rainwater can be used as soft process water for applications that do not require drinking water quality. For example:

Cooling Water

Cleaning

Drilling Fluid

Irrigation & Humidification

Fire-Fighting Water Reservoirs

REFERENCES FOR INDUSTRIAL & COMMERCIAL APPLICATIONS

Lammsbräu Brewery | Germany

Shopping Mall Riomar | Brazil

Bad Hersfeld Clinic | Germany

WISY 4-STEP HARVESTING SYSTEM

The WISY 4-step rainwater harvesting system ensures that your rainwater is clean enough to store.

By using the 4-step system you will:
  • reduce the amount of particulates that enters the rainwater tank & as a result prolong the life of your pump filtration equipment
  • oxygenate the water to inhibit growth of anaerobic bacteria
  • create a higher & better water quality for your system
  • ensure a calmed inflow & distribution of the water without re-suspending sediments
  • prevent formation of a surface barrier layer and therefore ensure optimum exchange of oxygen between air and water
  • extract clear rainwater from the cleanest water layer
  • eliminate the need to clean debris from your tank
  • minimize system maintenance due to unique pre-filtration technique

HOW DOES IT WORK?

STEP 1 : PRE-TANK FILTRATION

During the first step of the filtration process up to 90 % of rainwater is filtered and diverted to the rainwater tank. The remaining 10 % are used to ensure the self-cleaning effect of the filter. WISY filters operate as a first flush device, directing leaves, dirt and debris to drainage or On-Site Detention tank (OSD). Therefore, large particulates are removed. Due to the oxygenation of the water during the filtration process, the amount of harmful bacteria in the rainwater tank is greatly reduced.

Diversion & Filtration 95 % Efficiency First Flush Self-Cleaning Oxygenation


STEP 2 : SMOOTHED INFLOW & DISTRIBUTION

While filtration removes most of the sediments, a small quantity will settle at the bottom of the tank. This biofilm layer is beneficial for the tank since it removes additional bacteria and metals from the water. The smoothing inlet is designed to direct incoming water upwards. This prevents rainwater from stirring up the healthy biofilm layer and also ensures the distribution of oxygen-rich water throughout the tank.

Calmed Inflow Maintain Healthy Biofilm Layer Even Oxygen Distribution


STEP 3 : FLOATING SUCTION FILTER

The floating suction filter ensures the intake of the cleanest water from just below the water surface.

Extract water from cleanest layer


STEP 4: MULTISIPHON OVERFLOW

By skimming floating particulates on the surface of the water the multisiphon prevents the formation of a surface barrier layer & ensures an optimum exchange of oxygen between air and water.

Skimming-Effect Ensure Oxygen Exchange Backflow Prevention Vermin guard

UNIQUE FILTRATION TECHNIQUE

We have been designing and manufacturing low-maintenance filters with stainless-steel mesh since 1989. These filters are in use all over the world - both in production processes and modern rainwater harvesting systems.

Note: All three videos show the operation when water enters the filter simultaneously from different angles. This example displays a WFF150 Vortex Fine Filter.

HOW DOES IT WORK?

When water falls through a vertical tube, it tends to cling to the inner surface of the tube. This behavior is caused by adhesion forces which can be exploited to alter the direction of water flow. Solids do not behave in this way, they just fall straight down. Furthermore, they are captured by the fine stainless-steel mesh of the filter. Only clean water can pass into the storage tank or back to the production process.


ALWAYS SAFE

The cross-sectional area of the connected tubing does not change at any point inside the filter housing so that larger debris particles can pass straight through. Even a tennis ball washed off the roof cannot block the rainwater pipe.

Wisy Filtration Principle

Leaves and particles cannot clog the filter