Frequently Asked Question (FAQ)

Q1: What is eFilter?
A1: eFilter is a point-of-entry outdoor water filter that removes sediment, rust, and larger impurities from your main water supply before it flows into your home, protecting your plumbing system and improving water quality throughout your house.

Q2: Why do I need eFilter?
A2: Municipal water may contain dirt, rust, and other impurities that can affect your skin, clothes, appliances, and plumbing system. eFilter helps improve water clarity and cleanliness for bathing, washing, and general use.

Q3: What types of outdoor water filters are available?
A3: We offer 3 types of eFilter systems to suit different needs:
 • 5-layer Sand Media – Durable and ideal for basic filtration.
 • Ciltron Cloth – Easy to maintain, good for visible sediment removal.
 • UF Membrane – Provides ultrafiltration for finer particles and bacteria removal.

Q4: Is maintenance easy?
A4: Yes! Our eFilter models come with a user-friendly backwash function that allows you to clean the filter without disassembly. Some models require periodic replacement or cleaning, depending on the media used.

Q5: Can eFilter protect my water appliances?
A5: Yes. eFilter acts as the first line of defense by removing sediment, rust, and impurities before water enters your home. This reduces buildup in water heaters, washing machines, and indoor filters — helping extend their lifespan and improve overall performance.

Q6: Where is eFilter installed?
A6: eFilter is installed outdoors, near your main water inlet. It is suitable for all types of properties, including landed homes and commercial buildings, as it filters water for the entire premises before it enters your plumbing system.

Q7: Can eFilter be installed in a condo?
A7: Yes! eFilter can be installed in condos, but you first need to check with the Management Office (MO) to get confirmation on whether they allow the installation of eFilter. As long as there is access to the main water inlet, installation is possible. Typically, installation will require coordination with the building management to ensure the filter is placed in an appropriate location to filter water for your unit.

Q8: Can I drink water directly after installing an outdoor water filter?
A8: No. eFilter is not designed for drinking water. It removes large particles like sediment and rust but does not eliminate bacteria, viruses, dissolved chemicals, or chlorine. For safe and clean drinking water, we recommend combining eFilter with eWater, our direct drinking water system.

Q1: What is a UF Membrane Outdoor Water Filter?

A1: A UF (Ultrafiltration) membrane outdoor water filter is a whole-house filtration system that acts like a high-precision sieve. Using hollow fibers with microscopic pores of 0.01 microns—10,000 times smaller than a human hair—it effectively removes dirt, bacteria, and parasites while allowing clean water to pass through. Made with durable, food-grade plastic and requiring no electricity, it’s perfect for homes looking for low-maintenance, reliable filtration.

Q2: Why do I need a UF Membrane Outdoor Water Filter if I already have an indoor water purifier?

A2: Indoor purifiers target point-of-use water for drinking and cooking, typically removing chlorine and fine contaminants. An outdoor filter like eFilter UF provides whole-house protection by filtering sediments, bacteria, and chlorine at the entry point—ensuring cleaner water flows to all taps and appliances.

Q3: What warranty coverage does the eFilter UF Membrane Outdoor Water Filter offer?

A3:

• SUS304 Casing: 10 years (Manufacturing defects only)

• H-Valve: 1 year

• Membrane cartridge: 1 year

• Auto flushing timer: 3 months

Q1: What type of membrane does eFilter UF Membrane use, and how does it filter water?

A1: eFilter UF membrane uses a PAN (Polyacrylonitrile) ultrafiltration membrane with an inside-out design. Water enters the core of the membrane and exits outward, allowing efficient removal of sediments, bacteria, and impurities while maintaining strong water flow. PAN membranes are valued for their chemical resistance, strength, and long-lasting performance.

Q2: What contaminants does eFilter UF Membrane remove?

A2: The filter removes:

• Sediments (sand, dirt, rust)

• Bacteria & microorganisms

• Chlorine and chemical residues

• Some heavy metals (e.g., lead, arsenic)*

*Effectiveness may vary based on water source and quality.

Q3: UF Membrane is fine at 0.01 micron, can I drink the filtered water directly?

A3: While the UF membrane effectively removes sediments, bacteria, and microorganisms, it does not remove chlorine, dissolved chemicals, viruses, or heavy metals. This means the water may still contain harmful substances that make it unsafe for direct consumption.

Q4: Are the supplied water pipes made of stainless steel (SUS304)?

A4: Yes. The eFilter UF Membrane comes with two SUS304 stainless steel pipes: a longer inlet pipe and a shorter outlet pipe. The connection pipes for the water meter are made of durable POLY material.

Q1: Does Esteel provide installation service for the eFilter UF Membrane Outdoor Water Filter?

A1: Yes, Esteel offers installation services for the eFilter UF Membrane Filter in selected areas. Please contact us to check availability in your location or to arrange installation support.

Q2: Can the eFilter UF Membrane Outdoor Water Filter be installed vertically or horizontally?

A2: Yes, it can be installed in either orientation. Just make sure the unit is properly supported to prevent hose strain and leakage.

Q3: Does the UF Membrane Outdoor Water Filter reduce water pressure?

A3: There may be a slight pressure drop (around 10–20%) due to the filtration process, but it typically does not affect outdoor usage or household water supply noticeably.

Q4: My water pressure is low. Can I still install the UF Membrane Outdoor Water Filter?

A4: Yes, the UF Membrane Filter can function with low to moderate water pressure. However, very low pressure may result in slower filtration or reduced flow rate. For optimal performance, a minimum inlet pressure of 1 bar (approx. 14.5 psi) is recommended. If needed, you may consider installing a booster pump or a water tank to improve pressure.

Q1: Does the UF Membrane Outdoor Water Filter require maintenance?

A1: Yes. Regular maintenance ensures optimal performance and longevity.

• Flushing: The system includes an auto flushing timer. Set it to flush once every 3 days for 1 minute.

• Backwashing: Do this manually by turning the H-valve to backwash mode. Perform monthly or as needed until water runs clear.

Note: Settings may vary based on your water quality and usage. For a detailed tutorial, visit our YouTube channel.

Q2: Do I need to replace the UF membrane cartridge?

A2: Yes. While the membrane is durable, it’s a consumable part. With proper maintenance, it typically lasts 3–5 years, depending on water quality and usage. Replace it earlier if you notice reduced water flow or filtration performance.

Q3: How often should I change the battery in the flushing timer?

A3: The timer uses 4x AAA alkaline batteries, which last approximately 6–12 months under normal usage.

Q1: Why is my water still yellow after using the UF Membrane filter?

A1: Yellowish water after filtration can be caused by several factors:

• Incorrect valve mode: Make sure the H-valve is set to Filter Mode, not Bypass or Backwash.
• Flushing issue: Check that the auto flushing timer is working and has working batteries.
• Tap position: Ensure the tap connected to the auto flushing timer is fully open to allow flushing.
• Rusty or aging pipes: Old plumbing or supply lines may release iron particles that cause yellow discoloration.
• High dissolved metals: While the UF membrane removes particles, it cannot fully remove dissolved iron, manganese, or chemical discoloration.
• Water source contamination: If your water source contains pollutants beyond UF capabilities, such as chemical runoff or industrial waste, further filtration (e.g., activated carbon or iron removal filter) may be needed.

Q2: The auto flushing timer stopped working. What should I do?

A2: First, check if the 4x AAA batteries need replacing. If the timer display is blank or the unit is unresponsive, replace the batteries. Also, ensure the timer is set correctly and securely connected to the valve. If the issue persists, please contact Esteel customer service for assistance or a possible replacement (warranty: 3 months).

Q3: My water pressure seems lower than usual after installation. Is this normal?

A3: A slight drop (10–20%) in pressure is expected after filtration due to resistance in the membrane. However, if the pressure is too low:

• Check for clogged membrane (perform backwash).

• Inspect for incorrect valve mode or kinks in the hose.

• Low inlet pressure may require a booster pump or a water tank setup for optimal flow.

• If the membrane is over 3 years old, consider replacing it.

Q4: What is the size of the inlet/outlet connection?

A4: The eFilter UF Membrane Filter uses standard ¾-inch pipe fittings, which are compatible with most home plumbing systems.

Q5: Can I relocate the unit after installation?

A5: Yes, it can be relocated, but you may need a professional to reinstall the piping and ensure water-tight connections.

Q1: What is the eSolar Solar Hot Water System?
A1: The eSolar Solar Hot Water System uses solar energy to heat water, reducing your reliance on electric water heaters. The system includes solar panels, a storage tank, and a backup electric heater to ensure hot water is available even on cloudy days. It’s eco-friendly, energy-efficient, and cost-effective, helping you save on electricity bills in the long run.

Q2: How does a solar water heater work?
A2: eSolar uses the thermosiphon principle, where cold water flows into the solar collector, gets heated by sunlight, and rises into the insulated storage tank. Hot water is then delivered through your plumbing when needed. A 3kW electric booster acts as a backup during cloudy or rainy days.

Q3: What are the benefits of a solar water heater?
A3:

• Saves up to 80–90% on hot water electricity bills

• Eco-friendly and sustainable

• Provides hot water even during power outages

• Long-lasting and low maintenance

• Increases property value

Q4: How long do solar water heaters last?
A4: With proper maintenance, solar water heaters can last 15–20 years or more.

Q5: What maintenance is required?
A5: Regularly check for leaks, clean the solar collector surface, ensure insulation is intact, and inspect the anode rod annually. Professional servicing is recommended every 1–2 years.

Q6: Can solar water heaters be used with existing water heating systems?
A6: Yes, they can complement your current heating system. During extended cloudy periods, you can switch to electric heating via the built-in backup heater.

Q7: What is the warranty for eSolar?
A7: eSolar is backed by a two-tier warranty:

• 12-Month Comprehensive Warranty – Covers parts, labor, and freight for installations within a 30-kilometer radius of the ESTEEL dealership where the unit was purchased. Additional charges apply for locations beyond this radius.

• 9-Year Parts Guarantee – Applies specifically to the solar collector and tank, protecting against corrosion after the 12-month comprehensive warranty expires.

Q1: What capacities are available for eSolar?
A1: eSolar is available in 180L, 300L, and 450L capacities.

Q2: Which model/capacity should I choose?
A2:

a. The table above is based on a 6” rain shower head with 10-minute showers per person:

• Up to 4 people → eS180L (180L)

• 4–6 people → eS300L (300L)

• 6+ people or bathtub users → eS450L (450L)

b. These estimates are general. Factors such as weather, water pressure, usage frequency, and shower head size may affect performance.

c. For bathtubs, estimate 68L (15 gallons) per use, and choose a larger tank accordingly.

Q1: Where should the solar water system be installed?
A1:

• Facing direction: Install facing South for optimal sunlight in Malaysia. North, East, or West can also be used depending on roof orientation — avoid shaded areas.

• Height: Install at the highest point of the roof for best thermosiphon flow.

• Roof strength: Ensure your roof can support ~400kg. Roof truss reinforcement is recommended for older buildings.

Q2: What preparation is required before installation?
A2:

• Hot and cold water piping (use heat-resistant pipes like copper, PA, or PPR)

• 15 Amp single-phase plug point for booster

• Water pressure pump (for large rain showers)

• Ready access to water and power

Q3: What types of roof can support installation?
A3: eSolar can be installed on both pitched and flat roofs. For flat roof installations, an angled aluminum rack will be provided to ensure optimal tilt for sunlight absorption. Please note that the aluminum rack is not included in the basic installation and may incur additional charges.

Q4: Does Esteel provide installation?
A4: Yes, basic installation is included for selected areas. Included are:

• 3m hot/cold stainless steel piping

• 3kW backup heater + thermostat

• Pressure Temperature Relief (PT) Valve

Q5: What is not included in basic installation?
A5:

• Pipe insulation

• Aluminium rack (for flat roofs)

• Crane service

• Water pump

• Mixer taps

• Additional piping beyond 10ft

• Power point wiring for booster heater

Q1: When should I turn on the backup heater?
A1:

• During extended cloudy/rainy periods

• When hot water usage exceeds tank capacity

• In hazy seasons with reduced solar radiation

Q2: Will I get hot water on rainy days or at night?
A2: Yes, the tank is insulated with 50mm of high-density PU foam and fiberglass wool. It retains heat for up to 24–36 hours. Short rain periods won’t affect availability, but prolonged overcast days may require backup heater use.

Q3: Do I need a water pump?
A3: eSolar uses natural thermosiphon circulation and does not require a circulation pump. However, we recommend a pressure pump for cold water to enhance the shower experience, especially for large rain shower heads.

Q1: How much can I save with a solar water heater?
A1:
Electric Heater (4 units example):

• Purchase + Installation: RM2,000

• Monthly electricity cost: RM81.97

• Yearly electricity cost: RM983.64

eSolar Solar Water Heater:

• System cost: RM5,235

• Installation: RM0 (in selected areas)

• Yearly electricity cost: RM0 (if backup heater is rarely used)

Estimated Return on Investment (ROI):

• ROI = (RM5,235 – RM2,000) / RM983.64 ≈ 3.3 years

After the break-even point (around 3.3 years), you enjoy free hot water for the remaining lifespan of the system, typically 15–20 years, making it a cost-effective and eco-friendly solution.

Q1: What is the eWater Intelligent Hot Pure (Smart Touch)?
A1: It is an under-sink Reverse Osmosis (RO) water purifier that delivers hot and room-temperature purified water. Designed for modern kitchens, it features advanced filtration, smart safety functions, and user-friendly touch controls.

Q2: How does the eWater Intelligent Hot Pure work?
A2: It uses a multi-stage reverse osmosis (RO) filtration system and includes a built-in hot water tank, allowing instant access to safe, purified hot or ambient water at the touch of a button.

Q3: What are the benefits of using the eWater Intelligent Hot Pure?
A3: Instant access to hot and purified water

• High-quality RO filtration (0.0001 micron)

• Space-saving design under the sink

• Safety features like child lock and heat-proof tap

• Self-service cartridge replacement

Q4: What is the warranty for the eWater Intelligent Hot Pure?
A4: The system comes with a 3-year warranty.

Q1: What filtration system does the eWater Intelligent Hot Pure use?
A1: It uses a Reverse Osmosis (RO) filtration system that filters down to 0.0001 micron, effectively removing up to 99% of bacteria, viruses, chlorine, heavy metals, and other harmful substances.

Q2: How many cartridges are there in the eWater Intelligent Hot Pure?
A2: The system features a 5-stage filtration process integrated into a single cartridge. It includes PP foam, activated carbon fiber, RO membrane, post-activated carbon, and a PP pleated filter.

Q3: Will reverse osmosis (RO) produce wastewater?
A3: Yes, but it’s efficient. The system has a 2:1 filtered-to-wastewater ratio, better than the common 1:3 in standard RO systems.

Q4: What is the flow rate of the system?
A4: Ambient water: 2.0L/min | Hot water: 1.2L/min

Q5: Do I need to boil the water before drinking it?
A5: No, the RO filtration ensures the water is safe for direct consumption.

Q6: Is there a water tank inside the unit?
A6: Yes, the eWater Intelligent Hot Pure includes a 2-liter hot water tank made of stainless steel 304. Ambient water is dispensed directly after filtration, without a storage tank.

Q7: Can the hot water temperature be adjusted?
A7: Yes, you can preset the hot water temperature anywhere between 45°C and 95°C. However, because the system includes a built-in hot water tank, once the water is heated to a higher temperature, it cannot be lowered until the tank is emptied and reheated. This is a limitation of tank-based systems.

Q8: Can the ambient water temperature be adjusted?
A8: No, ambient water is at room temperature.

Q9: Can the smart touch tap be rotated?
A9: Yes, it can swivel 120° for ease of use.

Q10: How long can the cartridge last?
A10: It can filter up to 6,000L of water or last up to 1.5 years, whichever comes first.

Q11: What is the drill hole size required for the tap installation?
A11: A 25mm hole is required.

Q12: What type of piping does the eWater Intelligent Hot Pure use?
A12: The system uses PE (polyethylene) tubing for ambient water and silicone tubing for hot water. These materials are chosen for their safety, durability, and heat resistance.

Q1: Do Esteel provide installation for the eWater Intelligent Hot Pure?
A1: Yes, Esteel provides basic installation services for the eWater Intelligent Hot Pure in selected areas. However, electrical work is not included in the installation service.

Q2: What should I prepare before installation?
A2:

• A power outlet located under the kitchen sink

• A ready kitchen cabinet with access to an incoming water source and drainage

• A compatible drill hole (25mm) for the Smart Touch tap (optional, depending on installation type)

Q3: Can I install it if the power socket is above the kitchen sink?
A3: No, the power outlet must be located under the sink, as the system and all piping are installed below.

Q4: Can I use the system without electricity?
A4: No, electricity is required for both filtration and heating functions.

Q5: Can I use the system without water?
A5: No, continuous water supply is necessary to operate the system. Running it dry may damage the unit.

Q1: Does the eWater Intelligent Hot Pure require maintenance?
A1: The system requires minimal maintenance. The only regular task is replacing the filter cartridge. Each cartridge is designed to filter up to 6,000 liters of water or last 1.5 years, whichever comes first.

The system features a color indicator to show cartridge status:

• Yellow means the cartridge is expiring soon

• Red means the cartridge has expired

These indicators appear on both the Smart Touch tap and the main filter unit, ensuring you know exactly when to replace the cartridge.

Q2: Do you provide servicing?
A2: No on-site servicing is provided. The system is designed for self-service with easy cartridge replacement.

Q1: Is there a risk of children getting burned by the hot water?
A1: No, the system is designed with safety in mind. The Smart Touch tap includes a child lock feature and requires a double-press to dispense hot water. Additionally, the tap is heat-resistant to prevent accidental burns.

Q2: Will I have two taps on my sink if I install this system?
A2: Yes, you will typically have two taps — one Smart Touch tap for dispensing purified water (ambient and hot), and your existing tap for regular washing water.

Q3: Why is the temperature limited to 95°C?
A3: The temperature is limited to 95°C to prevent boiling water, which can cause the tap to sputter and increase the risk of scalding. By keeping the temperature at a safe and optimal level, we ensure a smoother and safer water dispensing experience while preserving the longevity of the unit.

Q4: Does the hot water in the tank keep boiling?
A4: No, the hot water in the tank does not continue to boil. The water is heated to the preset temperature (up to 95°C) and then maintained at that temperature. If unused, the water temperature may drop slightly, and the system will reheat it to the desired level. This ensures the water stays at a comfortable warmth without constantly boiling, preventing overheating and conserving energy.

Q5: Does the eWater Intelligent Hot Pure use a lot of electricity?
A5: No, the eWater Intelligent Hot Pure is designed to be energy-efficient. It only heats water when needed and maintains the temperature in a way that minimizes energy consumption. Compared to traditional water heaters, it uses significantly less electricity, making it a cost-effective solution for your hot water needs.