Why ER outdoor water filter?

ER Series Outdoor Filters remove

Removes Turbidity and Suspended Solids
Rust, sediments, silt and others as small as 5 microns

Removes Organic Chemicals
Herbicides, pesticides, fertilizers, industrial discharge, human and domestic waste

Removes Unwanted Taste, Smell and Colour
Tannin, chlorine and by-products

ER Series Outdoor Filters are built to last

Powerful Centralized Filtration
Provides clean water at every tap

Robust System
Durable, all-weather construction

Proven Performance
Over 15,000 units sold

Patented Cel-Valve Control System
Reliable and simple operation

British Technology in Water Filters Since 1982
Reliability and quality guaranteed with a rich history and continuous innovation throughout the years

Food Grade Stainless Steel 304 Casing for Your Water Filter
Not just any steel, but premium quality stainless steel which is certified food grade to ensure the best for your health and wellbeing

Water as nature intended

Developed primarily for household and light industrial applications to address water impurity problems at the point-of-entry of municipal treated water supply, thus, delivering clean clear water to every water outlet in your home and building.

How does the ER-series outdoor water filter work?

Multi-Medium Quartz Filtration
Multi-medium filters consist of coal based activated carbon, anthracite and/or fine quartz for fine filtration of sediment, colour, excessive chlorine and suspended solids down to as small as 5 microns.

From the filters inside to the casing outside, the ER series outdoor water filters are made with quality and durability.

  • SUS 304 Stainless Steel Casing
    For excellent corrosion resistance and durability
  • Stainless Steel CEL Valve
    British patented technology that provides simple, robust, user-friendly yet durable means to recondition the water filter.
  • Activated Carbon
    Remove foul taste, colour, odour, chlorine, by-products, organic matters
  • Anthracite
    Remove flocculation, rust, fine sediment
  • Fine Quartz Sand
    Filter fine sediment as small as 5 microns
  • Medium & Coarse Quartz Sand & Crystal
    Filtration support bed, ensure effective backwash
  • Special Stone
    For under drain protection
  • Backwash System
    The filters are easy to maintain with a DIY backwash system that cleans the filter without the need for cartridge replacement or maintenance cost.
    Depending on usage and water condition, just backwash once a week.

Take a look at this video to see how the filters work!

How to choose a water filter for my home

Bacfree ER Series outdoor water filters are your best choice if you’re looking to get clean, filtered water at your home from every tap, for your household pets, personal hygiene and baths, food and beverages, kitchen uses, or outdoor uses.

To choose the right outdoor water filter for your home, the question to ask is, how many people are in your household?

4 people & below


The ER19M, part of Bacfree’s ER-series outdoor water filters, is suitable for single-storey intermediate houses, to be used by 4-5 people in the premise.

ER19M has a maximum flow rate of 2.0m3/hour, and a filter vessel volume of 35 litres.

5 to 7 people


The ER19S/SM, part of Bacfree’s ER-series outdoor water filters, is suitable for double-storey intermediate houses and Semi-Ds, to be used by 5-7 people in the premise.

ER19S/SM has a maximum flow rate of 2.5m3/hr, and a filter vessel volume of 45 litres.

7 people & above


The ER28S/M, part of Bacfree’s ER-series outdoor water filters, is suitable for bungalows, to be used by 7 people or more in the premise.

ER28S/M has a maximum flow rate of 3.5m3/hr, and a filter vessel volume of 91 litres.

Optional: Introducing the ER Auto Outdoor Water Filter


Enjoy a complete peace of mind while the on-board AI takes care of filtration, backwash and recondition processes automatically. Just set the schedule and let it run by itself.

Fully automatic stainless steel multi medium filters with Advanced Automatic Valve Controller Module (AAVAC) and PLC, integrated circuit, Bacfree’s proprietary CEL stainless steel 316 valve system and Bacfree AMACEL electric actuators to control filtration, backwash/recondition processes using automated control valves, based on time, water usage or manual initiation.

However, If you prefer a smart water dispenser that can dispense hot water in different temperatures and volumes,
you can check out the Watero Smart Water Dispenser, a standalone water dispenser that requires no installation – just refill water and drink!

Watero has a compact design, and is suitable for small homes, small offices, and small families!

However, If you prefer a kitchen water filter that is fitted onto your sink to be dispensed through your tap water, you can also take a look at the BS series water filter with premium purification elements.

Just fit it onto your sink and connect it to your kitchen tap to get quality drinkable filtered pipe water without boiling.

If you are looking for premium selections of water filters for your optimal health, you might want to check out water filters with an advanced ionized system, capable of supplying you with water at different pH levels for different health purposes.

The BA-series HealthSpring Water Filters provide an all-in-one solution with filtration, hot water supply, pH level adjustment, and reverse cleaning design.

ModelMax Flow RateConnection SizeDimensionsFilter Vessel VolumeInstallation Required Space
ER19M2.0m3/hr3/4″ DN2071/2 Dia x 66.5Ht inch
(19 Dia x 168.9Ht cm)
35 Litres18” x 18” x 67.5”
(46.7cm x 45.7cm x 171.5cm)
ER19S/SM2.5m3/hr3/4″ DN2081/2 Dia x 70.5Ht inch
(21.6 Dia x 179Ht cm)
45 Litres20” x 20” x 71.5”
(50.8cm x 50.8cm x 181.6cm)
ER28S/M3.5m3/hr1″ DN2512 Dia x 71.5Ht inch
(30.5 Dia x 181.6Ht cm)
91 Litres24” x 24” x 72.5”
(61cm x 61cm x 184.2cm)

Warranty details

  • 10 Years

    Stainless Steel Housing

  • 5 Years

    Filtration Media

  • 5 Years

    Water Turbidity And Colour

ER-Series outdoor water filters come with comprehensive warranty packages for your peace of mind.

The stainless-steel housing of the water comes with a warranty of 10 years.

The filtration media, which is due to be changed after 5 years, has 5 years warranty itself for the first 5 years.

And finally, the water quality is also guaranteed with 5 years warranty of water turbidity and colour.

ER-series outdoor water filter reviews

Total Reviews: 6

Norhazlina Abd Hamid (Facebook)

January 2019

Good Servicing, fast delivery and value for money.

Choon Hock (Facebook)

December 2018

Easy to use. Highly recommended.

Chan Yeen Yee (Facebook)

December 2018

good filter product for clean and healthy water. good services from company.

Ken T. (Lazada)

October 2018

Genuine direct from the company!

Attiyaa Z. (Lazada)

June 2017

Happy with the purchase. Instruction manual is confusing but succeeded in assembling it anyway. Long term investment for healthy drinking water.

Sathya M. (Lazada)

June 2017

Happy with the product.

Water filter maintenance: How to clean and maintain my outdoor water filter

The filters for ER-Series are easy to maintain with a DIY backwash system that cleans the filter without the need for cartridge replacement or maintenance cost.

Depending on usage and water condition, just backwash once a week.

The valves on the water filter are labelled 1, 2, and 3 so that you can refer to them easily.

To do a backwash,

Step 1: Close Valve 2
Step 2: Close Valve 1
Step 3: Open Valve 3
Step 4: Flush out the accumulated sediments and rust until it is clear
Step 5: Close Valve 3
Step 6: Open Valve 1
Step 7: Open Valve 2


We prepared a video for you so that you can understand better, check it out!

As for the filtration media, the carbon layers should be replaced every 5 years.

And the Anthracite, Quartz Sand and Special Stone layers should be replaced every 10 years.

Carbon Layer

  • Lifespan – 5 years
  • Media to change – Granulated activated carbon
  • Media performance – Removes:
    • Foul taste
    • Chlorine
    • Colour
    • Organic Chemicals

Full Media

  • Lifespan – 10 years
  • Media to change
    • Granulated activated carbon
    • Anthracite
    • Fine Quartz
    • Medium Quartz
    • Coarse Quartz
    • Special Stone
  • Media performance – Removes:
    • Sediment
    • Colour
    • Chlorine
    • Suspended solids up to 5 microns

To schedule an appointment to change your filter, call us now

Water filter comparisons and prices in Malaysia

Which water filter do you need? What are the differences between the different types of water filters?
How much does a water filter cost?
Here’s a comparison guide of the different types of water filters in Malaysia for you.

Water Filter

ER-Series Outdoor Water Filter

BS-Series Indoor Tap Water Filter

Watero Smart Water Dispenser

HealthSpring Advanced Water Ionizer System

Placement TypeOutdoor water filter at water meterIndoor water filter for water tapPortable water filter and water dispenserIndoor water filter and ionizer for water tap
Filter Type6 layers multi-medium quartz filtration with carbon, anthracite, fine quartz sand, coarse quartz sand, quartz crystal, and special stoneCeramic & carbon filtration with silver ion & mineral stones4 layers polypropylene, carbon (x2), RO membrane filter
+ 1 layer UV disinfection
Hollow fiber filter membrane with unique ions
Water Dispenser TemperatureRoom temperatureRoom temperature5 temperature controlRoom temperature and hot water (selected models)
Water pHStandard pHAlkaline water up to pH 8.5 (selected models)Standard pHWidest pH range of 2.7 to 10.5
MaintenanceBackwash every week, replace carbon filter every 5 yearsClean filter element every week, replace filter element every 12 monthsReplace filter cartridge every 9 months (Cartridge 1 & 2) and every 18 months (Cartridge 3 & 4)Replace hollow fiber filter every 12,000L of water flow
Special Features
  • Backwash & rinsing system
  • No cartridge replacement & maintenance Cost
  • No pressure loss
  • Sink top mounting, portable, or under sink mounting
  • No electricity supply needed
  • Zero installation
  • Water quality monitor
  • Child safety lock
  • Mummy button
  • Instant hot water
  • Filter lifespan indicator
  • Compact design
  • Widest pH range of 2.7 to 10.5
  • High negative ORP powerful antioxidant
  • Advanced platinum technology
  • Rich in calcium, magnesium & ionized minerals
  • Self-cleaning technology
  • Microcluster easier for body to absorb
  • Energy saving
Made inEnglandEngland, SwitzerlandOEM ChinaJapan
PriceCheck Price NowCheck Price NowCheck Price NowCheck Price Now

Frequently asked questions about ER-Series outdoor water filter

Q: What is CEL Valve Control Technology?

It is an integrated flow control system providing a simple yet durable means to control filtration and filter reconditioning processes compared to conventional valve systems.

Q: Why choose Stainless Steel over Fibreglass?

Food grade stainless steel is safe, durable, ultraviolet proof and won’t degrade under extreme weather compared to fibreglass filter casing.

Q: Why use Activated Carbon to partially remove chlorine?

Excessive chlorine level can cause pipe corrosion, risks of cancer, unpleasant odour and taste.

Bacfree’s proprietary granular activated carbon layering technology is capable of reducing up to 80% of excessive chlorine and chemicals in the water supply.

Q: What is Turbidity / NTU?

Turbidity is a measure of water clarity.

The amount of materials suspended in water decrease the passage of light through the water.

Suspended materials include soil, particles (clay, silt and sand), algae, plankton, microbes and others.

Q: Why are ER-Series Outdoor Water Filters so big and bulky?

The ER-Series Outdoor Water Filter is specially designed with a specific height and width so that the flow of water has sufficient contact time with the filtration media layers to get the best absorption and filtration of the water.

Q: Why is the ER-Series water filtration process more complicated compared to other brands?

The ER-Series water filter uses a patented CEL-Valve for the best reliability and durability for industrial usage, hence the process may be different from other products from other brands.

What’s the biggest difference between Bacfree’s ER-Series Outdoor Water Filter and that of other brands?

The ER-Series water filter uses food grade 304 high grade stainless steel – whereas most of the other brands in the market use fiberglass filtration tanks.

Q: What’s so special about the 6-layer multi-media filtration?

The ER-Series’ outdoor water filter media consists of activated carbon, anthracite, quartz sand, and quartz stone, able to filter the water down to 0.5microns.

Q: How often do I need to do maintenance of the water filter?

The activated carbon layer is recommended to be changed every 5 years, whereas the anthracite, quartz sand, and quartz stone can be changed every 10 years. It is also advised to do a backwash of the water filter system once a week to keep the water quality at top condition.

Q: What are some of the parts that may undergo wear and tear?

While the stainless-steel casing for the outdoor water filter is designed to last a lifetime, the rubber gasket of the filter should be changed after 5 years to prevent leakages.

This is because the rubber is exposed under the sun all the time.

Q: How do I select the right outdoor water filter for my home?

Selecting the right outdoor water filter depends on the size of your home and the number of people using the water in your home.

The ER19M, part of Bacfree’s ER-series outdoor water filters, is suitable for single-storey intermediate houses, to be used by 4-5 people in the premise.

The ER19S/SM, part of Bacfree’s ER-series outdoor water filters, is suitable for double-storey intermediate houses and Semi-Ds, to be used by 5-7 people in the premise.

The ER28S/M, part of Bacfree’s ER-series outdoor water filters, is suitable for bungalows, to be used by 7 people or more in the premise.

Q: Is the water from the ER-Series outdoor water filter drinkable?

The ER-Series outdoor filter filters up to 5 microns, and cannot fully remove sediments, heavy metals, chlorine and bacteria.

Thus, we’d recommend you to have a point-of-use water filter like an indoor tap filter to further filter the water down to 0.2 microns for direct-drinking water.

Q: Will the water pressure be affected?

The water pressure will not be affected.

Q: How long does it take to do a backwash for the outdoor filter?

The backwash usually takes about 5 minutes. It is recommended that during the process, you monitor the water until it is clear.

Q: Can I choose a bigger outdoor filter than the recommended size for my home?

Yes, you can opt to upgrade – but not downgrade.

If the water consumption in a household is high, you should not go for a smaller filter size because it will get dirty very fast and the water pressure may get affected if the household consumption rate is high.

Best water filter near me

You can simply buy ER-series outdoor water filter or any other Bacfree water filters online through our Bacfree eShop or your favourite marketplaces (Lazada, Shopee ), and your favourite water filter will be delivered to your doorstep – no hassle!

Alternatively, you can visit your nearest Bacfree showroom in any of our Malaysian branches to take a look at your favourite water filters and bring them home!

Click here to find the Bacfree showroom nearest to you!