Tankless RO Filters or Direct Flow RO Filters
Tankless reverse osmosis filters, also called direct flow reverse osmosis filters, are a novelty in the field of reverse osmosis filtration. Reverse osmosis systems that do come with a reverse osmosis tank operate on the “storage before consumption” principle, that is, tap water is filtered and then stored in the RO tank before consumption. Tankless models, on the other hand, rely on immediateness.
Direct flow systems or tankless reverse osmosis filters do not feature any storage tanks and tap water is filtered and immediately ready for consumption.
Tankless reverse osmosis systems are preferable to traditional systems in homes where space is an issue, but are tankless reverse osmosis filters worth the higher price tag? Should you buy one? And how do direct flow reverse osmosis filters work?
Tankless RO Filters – How do They Work?
Except for the lack of a storage tank, tankless reverse osmosis filters work pretty much in the same way as regular reverse osmosis systems – water is pushed through a semi-permeable membrane to remove impurities and contaminants.
Homes with limited space can greatly benefit from a direct flow reverse osmosis, which won’t take up as much space as traditional reverse osmosis water filters.
Perhaps the most noticeable difference between a tankless and a regular reverse osmosis system is the number of RO membranes. While traditional reverse osmosis filters use a single RO membrane, direct flow systems use multiple membranes to deliver a more efficient filtration.
All types of RO filters rely on incoming water pressure to push water through the filter beds within your filter system. If your incoming water pressure does not meet the values required by your RO system, you need to install a booster pump regardless of whether you own a tanked or tankless reverse osmosis system.
As you can see, there aren’t many differences between the two types of reverse osmosis systems, yet the price of a direct flow reverse osmosis system is higher than that of a traditional model. Let’s see what are the benefits of owning a tankless RO system, and whether these benefits make tankless RO systems a worthwhile investment.
Advantages of Tankless Reverse Osmosis Filters
Beyond occupying less space, tankless reverse osmosis filters come with other benefits as well:
- The use of multiple membranes efficiently filter water;
- No waiting for water to accumulate in the RO tank – water is filtered and delivered instantly;
- Better taste – instantly delivered water tastes better than water stored in the tank;
- Better economy – water is only produced when needed;
- Space-saving alternative to traditional reverse osmosis systems.
If you live in a small house or apartment, if you like reverse osmosis filters, but don’t want to wait for your water to get filtered, a tankless system may be the perfect solution for you. But how about the disadvantages of a direct flow reverse osmosis system? Let’s see what are some of the drawbacks of such systems.
Disadvantages of Tankless Reverse Osmosis Filters
At first glance, a tankless reverse osmosis filter may seem like the perfect choice when it comes to RO filtration, but there are some disadvantages to consider as well:
- Tankless models cost more than traditional models;
- Since tankless models use multiple membranes, RO membrane replacement costs are higher than with traditional RO systems;
- The lack of a storage tank may turn out to be a disadvantage in certain situations;
- Water waste issues may still exist even with tankless RO systems.
While the lack of a water tank may save you space, in cases of water service interruptions having water pre-stored in the RO tank may prove useful.
Best Tankless Reverse Osmosis Filter at WaterFilterShop.co.uk: BMB-30 NOVA PRO Direct Flow
The BMB-30 Nova Pro Direct Flow 9-Stage Reverse Osmosis System is an advanced tankless RO filter that uses easy plug & play components, state of the art filters, and the quick-change filter technology for easy maintenance.
The system includes 9-stage of filtration as follows: a 5-micon antibacterial sediment filter, a CTO coconut shell carbon filter, a 1-micron antibacterial sediment filter with coconut shell carbon, two 400 GPD reverse osmosis membranes, a mineral filter, a detox filter, an oxygen filter, and an alkaline filter.
The Zinc nanoparticles in the first three filters confer antibacterial properties, inhibiting the growth of bacteria within the filter media. The two 400 GPD membranes give a 2 litres / minute instantaneous flow.
Besides the RO membranes and the pre-filters, the system’s post-filters enrich RO water with minerals. Thus, the tourmaline crystals in the seventh stage detox filter generate Far Infrared Rays that lead to better hydration. The oxygen filter’s natural magnesium confers anti-oxidative properties to water. The alkaline filter raises the pH level of purified water.
The system also includes a digital controller with Smart Water capabilities. The BMB-30 Nova Pro analyses water, tracking water temperature, errors, and filter life, and displays results on screen. The system also knows when water is being consumed, reverse flushing the membranes to enhance the output of the system.
This tankless reverse osmosis filter displays the number of days left until the next filter change, and sounds an alarm when it’s time to replace the old filters. The BMB-30 even takes things a step further by cutting off water flow if filter replacement time is surpassed significantly.
The system produces up to 1000 litres of water per day, being equally suitable for home use and some commercial applications. It is installed under-sink with a secondary faucet or a 3-way kitchen tap. The system is also equipped with dual LED strips for a spectacular view, and since it does not feature an RO tank, it saves you a lot of space.
Filters have a longer than average filter life, with pre- and post-filters lasting up to 12 months, while ro membranes last up to 36 months.
The BMB-30 Nova Pro does come with a higher price tag than tanked reverse osmosis systems, which are available at half the price of a tankless model, however, the BMB-30 has a much higher filtered water output than tanked residential ro systems, making it suitable for commercial applications as well.
Best Tanked Reverse Osmosis Filter at WaterFilterShop.co.uk: BMB-20 +Alkaline +Detox Pumped Quick Change 6 Stage Reverse Osmosis System
The BMB-20 6-Stage Filter is a 6-staged tanked reverse osmosis system that features nano technology filters that allow for an easy replacement due to the quick-change filter technology.
Water is filtered through the following 6-stage process: 5 micron antibacterial sediment filter, 1 micron antibacterial sediment filter with coconut shell carbon, TFC reverse osmosis membrane, a coconut shell carbon filter with pH stabilizer, an alkaline filter and a detox filter. All filters are replaced at the same time, every 12 months.
Similarly to the BMB-30 tankless filter, the BMB-20 contains filters infused with Zinc nanoparticles that once activated, have antibacterial properties. The membranes have 0.1 nano-meter sized pores, removing a host of impurities and contaminants, including 99.99% of microorganisms. The filters that follow the membrane have the role of polishing and alkalinising purified water by stabilising its pH level, adding a mix of healthy minerals high in nutritional value, and enhancing its hydration potential.
The BMB-20 tanked reverse osmosis system is designed for residential use, being especially suitable for homes with a daily drinking water consumption of 20 to 50 litres. The system is installed under-sink and a secondary faucet is required for the filtered tap water produced by the system. Alternatively, you can install a 3-way kitchen tap for hot, cold and purified water dispensed from a single tap.
Priced at half the cost of the BMB-30, the BMB-20 comes with the advantage of lower filter replacement costs and unified filter service life (all filters have a service life of 12 months), which makes it easier to service the system.
Conclusion: Is a Tankless Reverse Osmosis Filter Worth It?
Tankless reverse osmosis filters are undoubtedly more expensive than regular reverse osmosis filters. Some tankless models may even deliver a better filtered water output than RO filters equipped with reverse osmosis tanks. To some, these advantages may be well worth the higher cost, other users may not put so much value on these.
If you greatly value space-saving solutions and instantly filtered reverse osmosis water, a tankless model might be a worthwhile investment. If space considerations and immediately delivered purified water are not on the top of your list, a traditional reverse osmosis system can be just as good as a tankless one.
Tankless models usually have more reverse osmosis membranes and even a few extra pre- or post-filters, which may offer a better overall water quality, however, the more filters the higher the replacement costs. Multi-stage traditional reverse osmosis filters do exist as well, however, a typical multi-stage ro system includes 6 or 7 stages at most.
Overall, the choice between the two types of reverse osmosis filters will come down to preferences and budgetary considerations.