Understanding rainwater harvesting

Water is our most precious resource. By harvesting our abundant rainfall, we are helping the environment by using this resource sustainably.

With environmental issues such as global warming, changes in weather patterns, and increasing consumption of water, we must be proactive about how to reduce, reuse, and retain water.

Where can rainwater be harvested from?

  • Rooftop

  • Podiums

  • Surface Run-off

Why use RWHS?

Save the earth and save on water bills at the same time

  • Save On
    Water Bills

  • Backup
    Water Supply

  • Reduce Chances
    Of Flash Floods

  • Protect
    The Environment

Why Rainwater Harvesting?

We can no longer assume that there is an endless supply of water even in a country with high average annual rainfall like Malaysia, especially when taking into account:

  • Global Warming

  • Changes in Weather Pattern

  • Increasing Water Consumption

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

Advantages 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 example:

  • Toilet Flushing & Urinals

  • Irrigation

  • Laundry

  • Vehicle Washing & General Cleaning

  • Livestock Breeding & Farming

  • Industrial & Commercial Application

When substituting municipal water with rainwater, the amount of municipal water usage can be decreased by up to 50%, and by this, water bills can be reduced greatly.

Moreover, a rainwater harvesting system is a good form of water supply during water disruption or interruption.

Catchment Areas

Rainwater can be harvested from:

  • Roof Areas

  • Podium

  • Surface Runoff

The catchment area is dependent on how you’d like to use the harvested rainwater and the requirements of your local council.

The quality of harvested rainwater is affected by the catchment area as well. Rainwater harvested from roof catchment areas will be of higher quality compared to surface run-off catchment, due to lower human activity.

Bacfree Rainwater Harvesting System

Why use a 4-Step Rainwater Harvesting System?

The BACFREE WISY 4-Step Rainwater Harvesting System ensures that your rainwater is clean enough to be stored.

  • Reduces the amount of particles that enters the rainwater tank
  • Prolongs the life of your pump and filtration equipment
  • Oxygenates the water to inhibit the growth of anaerobic bacteria
  • Creates a higher and better water quality for your system
  • Ensures a calm inflow and distribution of water without re-suspension of sediments
  • Prevents formation of a surface barrier layer and therefore ensuring optimum exchange of oxygen between air and water
  • Extracts clear rainwater from the cleanest water layer
  • Eliminates the need to clean debris from your tank
  • Minimizes system maintenance due to unique pre-filtration technique

How does it work?

STEP 1: PRE-TANK FILTRATION

During the first step of filtration process, up to 90% of rainwater is filtered and diverted into the rainwater tank.

The remaining 10% is used for the filter’s self-cleaning function.

WISY filters operate as a first flush device, directing leaves, dirt and debris to the drainage or an On-Site Detention tank (OSD), so large particles are reduced.

Due to the increasing oxygen saturation during the filtration process too, the amount of harmful bacteria in the rainwater tank is also greatly reduced.

  • Diversion & Filtration
  • 90% Efficiency
  • First Flush
  • Self-Cleaning
  • Oxygenation
  • Remove Particles Larger than 0.28mm

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 distributes oxygen-rich water throughout the tank.

  • Calm 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 the cleanest layer

STEP 4: MULTISIPHON OVERFLOW

By skimming floating particles on the surface of the water, the multi-siphon prevents the formation of a surface barrier layer and ensures an optimum exchange of oxygen between air and water.

  • Skimming Effect
  • Ensures Oxygen Exchange
  • Backflow Prevention
  • Vermin Guard
  • Odour Seal

Here’s a little video for you to know more about our rainwater harvesting system here at Bacfree, check it out!

Unique Filtration Technique

A vertical filter mesh – How does that work?

The WISY filter collector has an almost vertical stainless steel filter mesh and maintains the cross-sectional diameter of the rainwater downpipe.

But how is it possible to collect up to 90% of rainwater using such a design?

The unique filtration technique of our rainwater harvesting system revolves around the natural forces applied to water – Adhesion, Cohesion & Gravity.

Adhesion

Water is attracted to other substances. Adhesion is the stickiness that water molecules have for other substances. As seen in the picture, water sticks onto the plant although gravity is pulling it down.

Cohesion

Water is attracted to water. Cohesion is the stickiness that water molecules have for each other. Only due to cohesion, water forms waterdrops.

Gravity

Gravity is the force by which a planet or other body draws objects towards its centre. The same applies for everything on earth, water included.

Did you know?

In 2012, the Malaysian Uniform Building By-Laws 1984 requires all newly-built detached buildings as well as bungalows and
semi-detached bungalows with a roof area of 100sqm and above to be equipped with rainwater harvesting systems to
capture rainwater for reuse.

Bacfree supplies, designs and installs rainwater harvesting
systems that meet all regulatory requirements!

Call us now for a free consultation

Rainwater harvesting system is an innovative and
suitable alternative approach of water supply for:

  • Commercial Buildings

  • Hotels

  • Shopping Malls

  • Public Buildings

  • High Rise

  • Landed Properties

With your own rainwater harvesting system,
rainwater can be used for:

  • Toilet Flushing

  • Laundry Washing

  • General Cleaning

  • Vehicle Washing

  • Farm Irrigation And Usage

  • Fire-fighting Water Reservoirs

  • Industrial And Commercial Applications, such as:

    Cooling tower
    Machine cleaning
    Industrial process
    Irrigation and humidification

Project reference

  • SP Setia Head Office

  • Pertubuhan
    Akitek Malaysia (PAM)

  • Bandar Rimbayu IJM Land

  • Danga Bay Johor Bahru

  • Eco Sanctuary

  • Four Seasons Hotel

  • Garden Residence

  • IKEA Tebrau Johor

  • KDU Glenmarie
    University & College

  • Lai Meng School, Bukit Jalil

  • Light Collection 1
    Light Waterfront Penang

  • LRT Station Alam Megah

  • Nadayu 28 Residence Sunway

  • Nadi Bangsar Service Residence

  • Nusajaya Techpark

  • Penang Second Bridge
    Batu Kawan

  • Setia Eco Hill

  • Sheraton Hotel Petaling Jaya

  • Sime Darby Medical Centre Subang Jaya

  • Spice Arena Stadium Penang

  • Sunway Nexis, Kota Damansara

  • The Capers Residence, Sentul

  • Toyota Manufacturing Plant

  • Tropicana Aman Selangor

Commercial Buildings

Offices

  • SP Setia HQ, Setia Alam
  • Standard Chartered Building, Teknologi Park Malaysia
  • Starpac Point, KL
  • PAM Centre, KL
  • Brunei Embassy, Cyberjaya
  • Centrus CBD31B, Cyberjaya
  • Nadayu 28 Shoplot, Sunway
  • Menara Mudajaya, Mutiara Damansara
  • Sime Darby Brunsfield Oasis, Ara Damansara

Shopping Malls

  • Melawati Mall, KL
  • South Gate, KL
  • Quill City Mall, KL

Supermarkets

  • Giant Setapak, KL
  • AEON Shah Alam
  • AEON Big Ipoh, Perak
  • AEON Klebang, Ipoh
  • Mydin Taman Pelangi Indah, Johor
  • Mydin Taman Rinting, Johor

Convention Centres

  • SP Setia Penang International Convention Centre, Penang

Hotels / Resorts

  • Four Seasons Place, KL
  • Stripes Hotel, KL
  • Sheraton, PJ
  • Cititel, Ipoh

F&B

  • McDonald’s, Putrajaya
  • Starbucks Bandar Seri Alam, Masai, Johor Bahru

Medical Buildings

  • Ramsay Sime Darby Medical Centre, Subang Jaya
  • KPJ Sri Manjung Specialist Centre, Perak

Educational Buildings

  • Lai Meng Primary School, KL
  • St Joseph Institution International School, PJ
  • Epsom College, Bandar Enstek
  • Raffle’s American School, Nusajaya
  • Reading University, Johor

Religious Buildings

  • Masjid Baitul Aman, KL
  • Masjid Agama, KL
  • Masjid Jamek Alam Shah, KL
  • Masjid Terminal Bersepadu Selatan, KL

Transport Buildings

  • Eco Majestic Toll Plaza, Semenyih
  • Petronas Petrol Station, Sg Besi Highway
  • MRT Ampang Extension Line
  • Sultan Abdul Halim Mu’adzam Shah Bridge, Penang
  • Alor Pongsu Plus Toll Plaza, Perak
  • LRT Extension Line
  • Petronas, Batu Pahat

Industrial Buildings

  • Panasonic Warehouse, Shah Alam
  • Autoways Factory, Bukit Jelutong
  • CS Yap Metalparts Industries Factory, Bandar Parklands
  • Vitagen Factory, Klang
  • UEM Nusajaya Technical Park, Johor
  • ASCENDAS Nusajaya Technical Park, Johor

High Rise Residential

  • Amprojek Paragon Residence, Johor
  • Austin Heights Manhattan, Johor
  • Berinda Molek Pine, Johor
  • Country Garden Danga Bay, Johor
  • Emerald Bay Puteri Harbour, Johor
  • Exsim The Leafz, KL
  • Eco World Eco Sky, KL
  • Feringghi Residence Condo Villa, Penang
  • IJM Light Collection 1, Penang
  • IJM Light Collection 2, Penang
  • IJM Light Linear, Penang
  • IJM Light Point, Penang
  • IJM Riana South, Buit Manda’rina
  • Gamuda Jade Hills Jadite Suites, Kajang
  • Gamuda The Robertson, KL
  • Kiara Seleksi, The Signature Desa Sri Hartamas
  • Liberty Park 3 Elements, Sri Kembangan
  • Mah Sing I-Parc @ Tanjung Pelepas, Johor
  • Mah Sing South Ville City
  • MKH Saville @ The Park, Bangsar
  • Nadayu 28 Sales Gallery, Sunway
  • Nadayu 28 Condominium, Sunway
  • Nadayu 62, Melawati
  • Pinnacle, Sri Petaling
  • Sime Darby The Glades, Putra Heights
  • Solid Promenade Damai 88, KL
  • SP Setia Sky 88, Johor
  • Sunway Damansara Nexis
  • Sunway Lacosta, Sunway
  • Titijaya 3 Elements, Sri Kembangan
  • UEM Land & Sunrise MK20
  • UEM Land & Sunrise MK22
  • UEM Imperial Harbour, Johor
  • YTL The Capers, Sentul
  • YTL Midfields, KL
  • Desa Park City Perdana Park Breezeway Condo, Kepong

Landed Residential

  • BBN Nilai Springs Villa Alpha, Nilai
  • BBN Nilai Springs Villa Beta, Nilai
  • BBN Nilai Springs Heights Signature Bungalow, Nilai
  • BBN Cluster Homes, Nilai
  • Bertam Alliance Casabella, Kota Damansara
  • BRDB Senja Residence, Sri Kembangan
  • DRB-HICOM Glenmarie Cove, Klang
  • Eco World Eco Majestic, Semenyih
  • Eco World Eco Sancturay, Canal City
  • Gamuda Jade Hills the Hills, Kajang
  • Hong Bee Land Anggun 3, Rawang
  • Hamtom Realty Suria Saujana, Kajang
  • IJM Bandar Rimbayu, Canal City
  • IJM Sh’ng Villa, Cheras
  • I&P Seri Beringin, Damansara Heights
  • Lum Chang Twin Palms Kemensah, Sungai Long
  • Mah Sing Garden Residence, Cyberjaya
  • Mah Sing Hijauan Residence, Cheras
  • Mah Sing Kinrara Residences Phase 1, Bandar Kinrara
  • Mah Sing Kinrara Residences Phase 2, Bandar Kinrara
  • Mah Sing M Residence, Rawang
  • Mah Sing 1 Lagenda, Cheras
  • Mitraland 16 Quartz Melawati
  • Paramount Sejati Residence, Cyberjaya
  • Putrajaya Perdana Desiran Bayu, Putrajaya
  • Reka Asset Ventures Lake Heights, Seremban
  • SDB Laman & Bayu, Puchong
  • Sierramas 41, Sungai Buloh
  • Sime Darby USJ Heights
  • Sime Darby USH Heights
  • Sime Darby Denai Alam
  • Sime Darby The Glades, Putra Heights
  • SP Setia Eco Glade, Cyberjaya
  • SP Setia Eco Hill, Semenyih
  • SP Setia Bandar Setia Alam
  • Tropicana Aman, Kota Kemuning (Phase 3)
  • UEM Land East Ledang, Nusajaya
  • UM Land Seri Austin Residence, Johor
  • WCT Laman Greenville, Klang
  • YTL The Dale, Sungai Besi
  • YTL The Reed, Sungai Besi

WISY 4-Step System
makes rainwater as clear as tap water

Bacfree’s WISY 4-Step System turns rainwater into clean, clear water that is safe to use in any home.
Rainwater is collected, filtered, and stored, ready for anytime you need it.

How does the WISY 4-Step System work?

Pre-tank filtration

  • Removes leaves, dirt and debris
  • Filters and stores up to 90% of rainwater
  • Remaining 10% used to clean the filter
  • Oxygenates water to reduce organic contaminants

Smoothed inflow and distribution

  • Calms water flow to protect the tank
  • Oxygenates water to ensure even distribution
    of oxygen to whole tank

Floating suction filter

  • Extracts water from the cleanest layer

Multisiphon overflow

  • Prevents scum on the water
  • Prevents backflow
  • Guards against vermin
  • Prevents odours

The WISY 4-Step System uses an elegantly simple design. It uses the laws of physics to create a highly
efficient system that needs very little maintenance, unlike other systems that often become clogged.

Low maintenance + high effectiveness = worry-free usage

The unique vertical filters in WISY systems greatly reduce filter clogging, thus ensuring long service life with very
low maintenance.

This is unlike other types of filters which quickly become clogged and require frequent cleaning.
The Vortex Filter sets water into a vortex movement to easily and safely filter fast flowing water.

  • High Efficiency

    Collects up to 90%
    of water

  • Low Maintenance

    Minimal clogging – most solids
    are easily flushed away

  • Hygienic Materials

    SUS304 stainless steel
    construction

  • Oxygen Enrichment

    Filtering process
    oxygenates water, which
    enhances its quality

  • Adjustable Outlet Angle

    Rainwater inlet and outlet
    can be freely rotated

  • Consistent Cross-sectional Area

    Cross-sectional diameter of down
    pipe remains unchanged,
    eliminating risk of clogging

ECO-VAAZ

Harvest your rain in style!

With the dual-function Bacfree decorative rain harvesting system integrated with planter pot, start saving water, time and money for a healthier, prettier garden today!

Features of ECO-VAAZ

Specifications

  • Material: Fibre-Reinforced Plastic (FRP)
  • Dimensions:
    • Size (mm): 540⌀(T) x 440⌀(B) x 1,200(H)
    • Inlet (mm): 50 – 80
    • Overflow (mm): 50 – 80
    • Outlet (mm): 20-25
    • Drain (mm): 25
  • Capacity:
    • Litres: 227
    • Gallons: 50
  • Thickness (mm): 3-4
  • Net Weight (kg): 20
  • Country of Origin: Malaysia
  • Certification: SPAN Certificate

FS First Flush Filter Collector

  • Materials
    • Body, Cover, & Mesh: SUS304 Stainless Steel
  • Dimensions
    • Size (mm): ⌀100 x 352 (H)
    • Inlet (mm): ⌀100
    • Outlet (mm): ⌀50
    • Drain (mm): ⌀100
  • Capacity
    • Flow Rate (L/s): 6.0
    • Velocity (M/s): 0.7
    • Efficiency (%): ≥80
    • Filtration size: 0.28mm
  • Country of Origin: Germany
  • Features:
    • Stainless steel construction – corrosion resistant
    • Dual function – filter & first flush
    • 0.28mm vertical provides effective separation of collected rainwater from sediment, leaves, moss & insects
    • Fine filtration prevents mosquito breeding
    • Maintains full cross section of downpipe – obstruction of rainwater flow
    • Low maintenance – once every 4-6 months
    • Fully mechanical – no energy consumption
    • Can be easily connected to round or other types of rainwater downpipe
    • Includes customized DN50 outlet connection adapter

FS First Flush Filter Collector

  • Materials
    • Body, Cover, & Mesh: SUS304 stainless steel
  • Dimensions
    • Size (mm): ⌀100 x 335 (H)
    • Inlet (mm): ⌀100
    • Outlet (mm): ⌀50
    • Drain (mm): ⌀100
  • Capacity
    • Flow Rate (L/s): 6.0
    • Velocity (M/s): 0.7
    • Efficiency (%): ≥80
    • Filtration size: 0.44mm
  • Country of Origin: Germany
  • Features:
    • Stainless steel construction – corrosion resistant
    • Dual function – filter & first flush
    • 0.44mm vertical filtration provides effective separation of collected rainwater from sediment, leaves, moss & insects
    • Fine filtration prevents mosquito breeding
    • Maintains full cross section of downpipe – no obstruction of rainwater flow
    • Low maintenance – once every 4-6 months
    • Fully mechanical – no energy consumption
    • Can be easily connected to round or other types of rainwater downpipe
    • Include customized DN50 outlet connection adapter

FSP First Flush Filter Collector

  • Body, Cover: Polyethylene (PE)
  • Mesh: SUS304 stainless steel
  • Size: ⌀100 x 335 (H)
  • Flow Rate (L/s): 6.0
  • Filtration Size: 0.28mm
  • Country of Origin: Germany
  • Features:
    • Polyethylene (PE) construction – matches downpipe colour
    • Dual function – filter & first flush
    • 0.28mm vertical filtration provides effective separation of collected rainwater from sediment, leaves, moss & insects
    • Fine filtration prevents mosquito breeding
    • Maintains full cross section of downpipe – no obstruction of rainwater flow
    • Low maintenance – once every 4 – 6 months
    • Fully mechanical – no energy consumption
    • Can be easily connected to round or other types of rainwater downpipe
    • Includes customized DN50 outlet connection adapter

Floating Suction Filters

  • Consists of a polyethylene ball and stainless steel strainer
  • Nozzle connections available in 1”, 1 ¼”, 1 ½” and 2” sizes
  • Filter mesh size: either 0.3mm or 1.2mm

Accessories

You can install optional accessories to enhance your Bacfree Rainwater Harvesting System’s functions.

RainAid® Valve – automatic top-up valve

Automatically switches water supply from rainwater to
main water supply when water level is low.

Features at a glance:

  • Easy to install
  • Wokring pressure: 55 – 1000 kPa (4 – 150 psi)
  • Maximum water temperature 60°C

Slimline And Sleek Tanks

Bacfree’s customisable tanks are designed to fit in any
premise. Its tough UV-stabilised material prevents fungus
and moss growth as well.

Features at a glance:

  • External bracing – for added strength and
    impact resistance
  • Available in many colours

Need a custom water tank built for your project?

Customise your tank now

Vortex WFF300 Pre-Tank Filter

  • Body: Polypropylene (PP)
  • Cover: Plastic / Steel
  • Mesh: SUS304 stainless steel
  • Size (mm): ⌀912 x 1,030 (H)
  • Flow rate (L/s): 185.0 (max.)
  • Filtration size: 0.38
  • Country of origin: Germany
  • Features:
    • Polypropylene (PP) construction – corrosion resistant
    • 0.38mm vertical filtration provides effective separation of collected rainwater from sediment, leaves, moss & insects
    • Fine filtration prevents mosquito breeding
    • Maintains full cross section of downpipe – no obstruction of rainwater flow
    • Inlet & outlet can be freely rotated – easier installation based on site condition
    • Oxygen enrichment – filtering process produces oxygen rich water which enhances water quality & inhibits growth of anaerobic organisms
    • Low maintenance – once every 4 – 6 months
    • Fully mechanical – no power consumption

Vortex WFF300 (short) Pre-Tank Filter

  • Body: Polypropylene (PP)
  • Cover: Plastic / Steel
  • Mesh: SUS304 stainless steel
  • Size (mm): ⌀912 x 939 (H)
  • Flow rate (L/s): 185.0 (max.)
  • Filtration size: 0.38
  • Country of origin: Germany
  • Features:
    • Polypropylene (PP) construction – corrosion resistant
    • Short version – easier installation based on site condition
    • 0.38mm vertical filtration provides effective separation of collected rainwater from sediment, leaves, moss & insects
    • Fine filtration prevents mosquito breeding
    • Maintains full cross section of downpipe – no obstruction of rainwater flow
    • Inlet & outlet can be freely rotated – easier installation based on site condition
    • Oxygen enrichment – filtering process produces oxygen rich water which enhances water quality & inhibits growth of anaerobic organisms
    • Low maintenance – once every 4 – 6 months
    • Fully mechanical – no power consumption

Vortex WFF150 Fine Filter

  • Body, Cover: Polypropylene (PP)
  • Mesh: 0.28mm SUS304 stainless steel
  • Size: ⌀315 x 780(H)
  • Flow rate (L/s): 15.7 (max.)
  • Filtration size: 0.28
  • Country of origin: Germany
  • Features:
    • Polypropylene (PP) construction – corrosion resistant
    • 0.28mm vertical filtration provides effective separation of collected rainwater from sediment, leaves, moss & insects
    • Fine filtration prevents mosquito breeding
    • Maintains full cross section of downpipe – no obstruction of rainwater flow
    • Inlet & outlet can be freely rotated – easier installation based on site condition
    • Oxygen enrichment – filtering process produces oxygen rich water which enhances water quality & inhibits growth of anaerobic organisms
    • Low maintenance – once every 4 – 6 months
    • Fully mechanical – no power consumption

Vortex WFF100 Fine Filter

  • Body, Cover: Polypropylene (PP)
  • Mesh: 0.28mm SUS304 stainless steel
  • Size: ⌀315 x 433(H)
  • Flow rate (L/s): 5.1 (max.)
  • Filtration size: 0.28
  • Country of origin: Germany
  • Features:
    • Polypropylene (PP) construction – corrosion resistant
    • 0.28mm vertical filtration provides effective separation of collected rainwater from sediment, leaves, moss & insects
    • Fine filtration prevents mosquito breeding
    • Maintains full cross section of downpipe – no obstruction of rainwater flow
    • Inlet & outlet can be freely rotated – easier installation based on site condition
    • Oxygen enrichment – filtering process produces oxygen rich water which enhances water quality & inhibits growth of anaerobic organisms
    • Low maintenance – once every 4 – 6 months
    • Fully mechanical – no power consumption

First Flush Diverter 1,000L

  • Material: Fibre-reinforced Polymer (FRP)
  • Size (mm): 1,100 (W) x 750 (L) x 1,100 (H)
  • Capacity: 1,000L
  • Country of Origin: Malaysia
  • Features:
    • Divert initial rainfall to drain by constant flow valve
    • Improve rainwater quality
    • Reduce tank maintenance

First Flush Diverter 500L

  • Material: Fibre-reinforced Polymer (FRP)
  • Size (mm): 1,100 (W) x 700 (L) x 650 (H)
  • Capacity: 500L
  • Country of Origin: Malaysia
  • Features:
    • Divert initial rainfall to drain by constant flow valve
    • Improve rainwater quality
    • Reduce tank maintenance

First Flush Diverter (Customized)

  • Material: Polyvinyl Chloride (PVC)
  • Country of Origin: Malaysia
  • Features:
    • Divert initial rainfall to drain by constant flow valve
    • Improve rainwater quality
    • Reduce tank maintenance

Smoothing Inlet 200mm or 100mm

  • Material: SUS304 Stainless Steel
  • Size: ⌀306 x 180(H) or ⌀130 x 180(H)
  • Country of Origin: Germany
  • Features:
    • Stainless steel construction – corrosion resistant
    • Installed on rainwater tank inlet pipe
    • Reduce velocity of incoming filtered rainwater
    • Fine debris sedimentation – avoid stirring of sediments
    • Aeration of rainwater tank – oxygenate rainwater by directing water upward & outward
    • Cleaner water – Creates layer of biofilm which removes additional metals & harmful bacteria

Rainwater Floating Suction Filter 2” or 1” (Fine)

  • Material
    • Mesh: SUS 304 Stainless Steel
    • Ball Float: Polyethylene (PE)
    • Hose: Food-grade
  • Inlet (mm): ⌀50
  • Filtration size (mm): 0.3
  • Country of Origin: Germany
  • Features:
    • Stainless steel & PE construction – corrosion resistant
    • Connected to the outlet of rainwater tank
    • Variable suction point based on water level due to ball float
    • Draws water from the cleanest point – 100mm from surface
    • Acts as secondary filtration with 0.3mm mesh
    • Optimum efficiency due to large surface area – ensures free, unhindered water inflow
    • Protect pumps & seals
    • Integral non-return check valve

Multisiphon Overflow 200mm or 100mm

  • Material
    • Body: ABS Plastic
    • Ball Float: Polyethylene (PE)
  • Dimensions:
    • Size (mm): 230 (W) x 1.067 (L) x 762 (H)
    • Inlet (mm): ⌀200
  • Country of Origin: Germany
  • Features:
    • Connected to rainwater tank overflow
    • Includes vermin trap – prevent rats & rodents from entering rainwater tank
    • Skims water surface – siphon debris, oil, grease & detergent
    • Function as non-return check valve – avoid backflow from drain
    • Odour tap – act as water seal against drain odours

Accessories

You can install optional accessories to enhance your Bacfree Rainwater Harvesting System’s function.

Big Boy Valve – for heavy duty systems

The Big Boy can fill a 30,000 litre tank in just 20 minutes! You can adjust the minimum and maximum water levels yourself, making it very suitable for a wide range of applications.

Features at a glance:

  • No water hammer – soft closing to protect fittings
  • Adjustable water levels – saves electricity and prolongs pump life
  • Patented self-cleaning mechanism – minimises blockages
  • Longtail – no tank fittings for thin walled tanks

Applications

  • Pump fed large storage tanks and/or reservoirs
  • Mains/gravity fed large storage tanks and/or reservoirs
  • As a backup water supply control valve, in the event of demand exceeding rainfall

First Flush Diverter Tank

Features at a glance:

  • Diverts initial rainfall to be drained through the constant flow valve
  • Improves rainwater quality
  • Reduces tank maintenance

Rainwater Tank

BFE Slimline 900

  • Material: High quality linear polyethylene (PE)
  • Dimensions:
    • Size (mm): 700 (W) x 1,200 (L) x 1,120 (H)
    • Inlet: 50mm
    • Overflow: 50mm
    • Outlet: 25mm
    • Drain: 25mm
    • Manhole: 250mm
  • Capacity: 900 (Nominal)
  • Thickness: 8mm
  • Weight: 39kg
  • Country of origin: Malaysia
  • Colours:
    • White marble (white & black fleck)
    • Sandstone (mottled)
  • Features:
    • Linear polyethylene construction with compounded ICORENE 9068 (Density: 0.938) – longer lifespan
    • UV stabilised with black fleck colour design – avoids moss and fungus
    • Features external bracing – added strength & impact resistance
    • Slim width – ideal for fitting under eaves
    • Coloured tanks design – blend in aesthetically with premise

BFE Slimline 500

  • Material: High quality linear polyethylene (PE)
  • Dimensions:
    • Size (mm): 650 (W) x 1,150 (L) x 1,025 (H)
    • Inlet: 50mm
    • Overflow: 50mm
    • Outlet: 25mm
    • Drain: 25mm
    • Manhole: 250mm
  • Capacity: 500 (Nominal)
  • Thickness: 8mm
  • Weight: 34kg
  • Country of origin: Malaysia
  • Colours:
    • White marble (white & black fleck)
    • Sandstone (mottled)
  • Features:
    • Linear polyethylene construction with compounded ICORENE 9068 (Density: 0.938) – longer lifespan
    • UV stabilised with black fleck colour design – avoids moss and fungus
    • Features external bracing – added strength & impact resistance
    • Slim width – ideal for fitting under eaves
    • Coloured tanks design – blend in aesthetically with premise

BFE SLEEK

  • Material: Fibre-reinforced Polymer (FRP)
  • Dimensions:
    • Size (mm): 590 (W) x 840 (L) x 835 (H)
    • Inlet: 50mm
    • Overflow: 50mm
    • Outlet: 25mm
    • Drain: 25mm
  • Capacity: 414 (Nominal)
  • Thickness: 4-5mm
  • Weight: 20kg
  • Country of origin: Malaysia
  • Colours: White (Other colours customizable)
  • Features:
    • Comes with top tank cover
    • Slim width – ideal for fitting under eaves
    • Louvers design – blend in aesthetically with premise

BFE SLAX

  • Material: Fibre-reinforced Polymer (FRP)
  • Dimensions:
    • Size (mm): 350 (W) x 1,200 (L) x 900 (H)
    • Inlet: 50mm
    • Overflow: 50mm
    • Outlet: 25mm
    • Drain: 25mm
  • Capacity: 350 (Nominal)
  • Thickness: 4-5mm
  • Weight: 20kg
  • Country of origin: Malaysia
  • Colours: White (Other colours customizable)
  • Features:
    • Comes with top tank cover
    • Slim width – ideal for fitting under eaves

Custom Tanks

Bacfree’s customisable tanks are designed to fit in any premise.
Its tough UV-stabilised material prevents fungus and moss
growth as well.

Features at a glance:

  • External bracing – for added strength and
    impact resistance
  • Available in various capacities

Need a custom water tank built for your project?

Customise your tank now

What is WISY?

Rainwater Harvesting Systems – German Engineering at its finest

WISY AG Germany has its company headquarters in HitzKirchen, a small town surrounded by meadows and forest within the boundaries of the Vagelsberg nature recreation area in Hesse, Germany.

The company was founded in 1989 by Norbert Winkler (WISY – WINKLER SYSTEMS), who laid the foundation for the emergence of rainwater harvesting by inventing and patenting the filter collector with the unique filtration technique.

Ever since, the company has undergone tremendous growth and transformation continuously and has strengthened the position as the leading manufacturer of high quality rainwater harvesting products and accessories in the world with partners in over 40 countries.

The unique filtration concept of the filter collector with a vertical filter mesh ensures efficient cleaning and collection of rainwater. Due to its unique design and construction, it operates easily and cannot be blocked at any time.

Beside the filter collector system, WISY AG provides nowadays also a large range of system components for rainwater harvesting systems of varying size and areas of applications.

Quality, Durability & Reliability – for these attributes the German company is well appreciated by their customers all over the world:

Throughout his lifetime, Narbert Winkler had a deep passion and interest in environmental protection.

Driven by this passion, WISY became not only a manufacturer of innovative rainwater harvesting products but also one of the pioneer and industry leaders of the rainwater harvesting industry in Germany and Europe.

Over the years, WISY AG has contributed tremendously towards the formulation of the German and European Guidelines for the promotion and implementation of rainwater harvesting systems which has provided an impetus for the rapid adoption of rainwater harvesting systems as an integral part of housing design across Germany and Europe.

Moreover the company is a founding member of the German Rainwater Association.

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