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- Water Purification Systems
- 2 Year Warranty
At Sulax, with our expertise in water purification systems, we have answered the most frequently asked questions from our customers in this FAQ section. Here, you will find all the information you need about using, maintaining, and replacing filters in our devices, as well as about water quality, so you can access clean and healthy water with confidence.
For home water purifiers, the most commonly used tank capacities are 6 liters, 8 liters, and 12 liters. These tanks store the purified water produced by the device. The answer to “how long does it take for the tank to fill?” depends on the membrane capacity and the mains water pressure.
Standard home water purifiers typically use membrane filters with a 75 GPD (gallons per day) capacity. These membranes can purify about 283.5 liters per day, which equals approximately 11.81 liters per hour. That means about 200 milliliters (0.2 liters) of water are purified per minute. Based on this, tank fill times can be calculated as follows:
6 liters = 6000 milliliters
6000 ml / 200 ml = 30 minutes
Result: A 6-liter tank fills in approximately 30 minutes.
8 liters = 8000 milliliters
8000 ml / 200 ml = 40 minutes
Result: An 8-liter tank takes about 40 minutes to fill completely.
12 liters = 12,000 milliliters
12,000 ml / 200 ml = 60 minutes
Result: A 12-liter tank fills in about 1 hour.
A reverse osmosis home water purifier typically uses about 2 to 3 liters of mains water to produce 1 liter of purified water. That means:
To operate efficiently, the air pressure inside the water tank must be at the correct level. Knowing how to set this helps prevent problems like “why doesn’t the tank dispense water properly?”
You can check and adjust the pressure through the air valve located at the bottom of the tank. When empty (with no water inside), the ideal pressure is between 6–8 psi.
Yes, water purifiers can operate without a tank. Today, tankless water purifiers are produced as alternatives to traditional tank models. These devices purify water instantly and deliver it directly to the faucet instead of storing it. However, this requires a high-performance membrane, high water pressure, and an advanced pump system.
Water tanks typically have a metal exterior for durability and a food-safe plastic interior lining to ensure hygienic storage. Some tanks are fully plastic, often used in portable or compact models. Metal-clad tanks are more common in home devices due to their longer lifespan and robustness.
A tankless water purifier is a system that doesn’t store water in a tank but purifies it on demand. Incoming mains water is filtered instantly and delivered to the faucet. Compared to tanked models, tankless purifiers save space and are more compact, but require high and steady water pressure to operate efficiently.
A package purification system first removes large impurities with pre-filters. Next, an activated carbon filter eliminates chlorine and odors. Then, a reverse osmosis membrane filters water at the molecular level, removing harmful substances. Finally, a mineral filter balances taste. The purified water is stored in the tank, ready for use when the faucet is turned on, providing clean and pleasant-tasting water.
The most common cause of bad odors is dirty or expired filters. First, always replace the activated carbon and other filters within the recommended timeframe. Regularly clean and disinfect the tank. If the mains water contains chlorine or organic substances, high-quality carbon filters are essential. With regular maintenance and genuine spare parts, your water purifier will consistently deliver fresh, odorless water.
To clean the water purifier tank, first shut off the water supply and drain the tank completely. Carefully remove the lid. Wipe the inside using a soft cloth or sponge with mild soapy water. Avoid harsh chemicals, as they can contaminate the water. Rinse thoroughly with clean water, close the lid, and restart the system. Doing this at least once a year maintains hygiene and improves water quality.
A bitter taste often occurs when the water lacks minerals. Reverse osmosis removes most minerals, making water taste flat or bitter. Other causes include old or dirty filters, bacteria build-up in the tank, or membrane malfunction. To resolve this, clean the tank and filters regularly, use a mineral filter, or have the system checked by a professional.
Water purifiers effectively remove sediments, chlorine, heavy metals, and microorganisms from tap water, providing clean, safe, and pleasant-tasting drinking water. For the system to remain effective, regular maintenance, filter replacements, and correct use are essential. When properly maintained, purifiers are highly reliable for providing healthy water.
The most common reason for white water is air bubbles. After replacing filters or when first operating the device, air can mix into the water, causing a milky appearance. This is usually temporary and clears up within minutes.
If the cloudiness persists:
In these cases, check the unit, inspect the filters, and contact technical support if necessary.
Normally, water purifiers—especially reverse osmosis systems—remove calcium and magnesium, preventing limescale. If you see limescale, possible reasons include:
Check and replace the filters, and contact technical support if needed.
White, cloudy, or bubbly water usually results from trapped air, especially after installing new filters or during initial use. This is harmless and typically clears within a few hours to a few days.
However:
the membrane may be faulty, filters may be installed incorrectly, or air may be trapped in the system. In these cases, check the device, release any air, and recheck the filters.
Purified water is healthy if it is produced with the right device and appropriate filters. Advanced systems like reverse osmosis remove chlorine, sediments, heavy metals, bacteria, and viruses, making water safe to drink. However, they also remove beneficial minerals, which can make the water taste flat. Therefore, devices with mineral filters are recommended. Without regular maintenance and filter replacement, purified water may not be safe.
The main reason is that tap water is not always reliable. A purifier filters out invisible contaminants, chlorine, heavy metals, and harmful microorganisms, providing clean and healthy drinking water. It eliminates the need for bottled water, saving money and reducing plastic waste. Having fresh, purified water directly from your tap is a major advantage in terms of convenience and safety.
Reverse osmosis systems remove most contaminants but also beneficial minerals like calcium and magnesium. As a result, purified water can taste flat or bland. However, this issue is easily resolved by adding a mineral filter in the final stage to restore natural minerals and improve flavor.
The pH of purified water is usually between 5 and 7. Since reverse osmosis filters out most minerals, the water can be slightly acidic. This doesn’t mean the water is harmful, but some users notice a softer or “empty” taste. To increase pH and balance the flavor, you can add an alkaline or mineral filter.
To maintain healthy, good-tasting water, filters should be replaced regularly. Membrane filters should be changed every 2–3 years. Signs that a replacement is due include slower flow, unpleasant taste, or odor. Post-carbon filters, which improve the final taste, should be replaced annually.
Sulax water purifiers come with a 2-year warranty for spare parts and system supply after delivery. During this period, you will receive any necessary spare parts and technical support. However, filters are not covered by warranty and should be replaced regularly as recommended to maintain performance.
Yes. Sulax water purifiers are produced in compliance with international quality and safety standards such as NSF, CE, and ISO. Each device undergoes strict quality control and is certified. Ensuring your water’s safety and cleanliness is our priority, and we are proud to provide you with the highest quality certified purification systems.
Water softeners use salt to reduce hardness and consume some water during the process. However, modern systems are much more efficient than older models. On average, softeners use only small amounts of salt and water per regeneration cycle—this makes up just a fraction of total daily consumption. A properly sized, efficient system minimizes salt and water use.
Using a water purifier is the most effective way to protect yourself from harmful substances in tap water. These devices filter out sediments, chlorine, heavy metals, and microorganisms, providing clean, healthy, and tasty water. Instead of constantly buying bottled water, you can have fresh water on demand. They also reduce plastic waste and help the environment. Sulax purifiers offer high performance and reliability to improve your quality of life.
Benefits include removing contaminants, chemicals, and microorganisms to ensure safe drinking water. It helps reduce digestive issues, supports immunity, and benefits skin and hair health. Purified water tastes and smells better, encouraging higher daily intake. With Sulax systems, you always have access to clean water, improving both health and lifestyle quality.
Replacement depends on usage and water quality, but typically pre-filters should be replaced every 6–12 months, and membrane filters every 2–3 years. Signs that it’s time include slower flow, taste or odor changes, or cloudy water. You can buy original filters safely from Sulax authorized service centers or official sales channels. Using original filters is essential for maintaining water quality and device performance. For assistance, please contact us anytime.
The tank stores purified water and allows fast flow from the faucet. This way, the device doesn’t have to purify water continuously, saving energy and water. It also provides consistent, convenient access to water. Sulax tanks maintain water quality and offer long-lasting performance with their durable design and correct pressure settings.
The main difference is how water is delivered to the membrane. Pumped models have an electric pump to compensate for low water pressure, resulting in faster filtration and quicker tank filling—ideal for low-pressure areas, but they consume electricity. Non-pumped models rely on mains pressure and are quieter with no power use, but may filter slowly if the pressure is low.
If your device isn’t producing any water, possible reasons include:
Check all components and contact technical support if necessary.
Yes, purified water is suitable for children and babies, but:
No, continuous operation isn’t normal. Possible causes include:
Inspect all parts and consult a professional if needed.
