Tankless Reverse Osmosis System with small size, replacement filter once a year - Waterdrop D4

The water supply in your home gets in under pressure, irrespective of where you live. Reverse osmosis relies on this same pressure to push water through a semipermeable membrane.
Water passes through the semipermeable membrane under pressure. This leads to the separation of the impurities from the water molecules. The impurities are on one side of the membrane, and the water molecules on the other, with the clean water going to your tap without any impurity whatsoever. There are several filtration stages in the RO water filtration process - up to seven sometimes, and these are responsible for the high purity of water.

When you buy the Waterdrop D4 reverse osmosis water filtration system, you are meeting the need for pure water in your household while adding to the beauty of your interior. The artistically designed housing houses an innovative technology that delivers an excellent filtration performance by combining multiple filtration materials into a single composite filter.
You only need limited space to install this tankless reverse osmosis system. Its optimized filtration performance means it reduces heavy metals, chlorine, and even TDS. This system packs a powerful filtration performance and an ultra-extended service life despite having a single composite filter.
With just one filter replacement all year long, this Waterdrop reverse osmosis water filter will serve you with maximum convenience.

Yes, it is perfectly safe to drink reverse osmosis water frequently. There are fewer contaminants in the water, so you are safe. The absence of contaminants means you are not prone to health issues like brain damage or anemic conditions in children. Parasites causing diseases are also eliminated from your water sources, providing you with clean and pure water.

This Waterdrop reverse osmosis system can deliver 0.28 gallons of water in a minute, conveniently meeting your household water needs.

For a traditional RO system, wastewater production is inevitable. However, the Waterdrop D4 RO purifier is powered by advanced technology that keeps the drain ratio at 1:1. Therefore, you can save up to 300% more water than the tanked traditional filter systems. You also spend less on water bills.

The simple design ensures an easy installation. You can be done in less than 30 minutes without needing any external help. All you have to do is check the instruction manual, and if you encounter any problem, watch the installation video on YouTube.

The integrated filter in this system needs to be replaced once every year.

You should replace it only once a year, depending on the quality of your local water.

a. Please note that the water softener is NOT designed to provide drinkable water. Its main function is to soften the water for washing clothes, taking a bath, flushing toilets, etc.

b. If a salt-based water softener is installed BEFORE the RO unit:
-The filtered water could be salty since our unit can only remove 90% salt added by the softener.
-The RO filter's lifetime could be shortened due to the unusual amount of sodium in the source water, which is NOT covered by the warranty.
-We have already put a clear warning on the product page regarding this aspect.

c. If your water softener is NOT salt-based, then our RO unit should work properly with it.

Yes, this reverse osmosis water filtration system can work with your RV. It has an integrated design that makes it possible to install it even in a tiny under-sink space, such as RVs. You can combine this filter system with your RV for a regular and reliable supply of clean water.
Now you can stop using the dirty and unsafe water from campgrounds. This filter system ensures you get clean and pure water for drinking directly from your taps and shower. You are also immune to the common health issues associated with contaminated water, which may prevent you from enjoying your road trip.

We do not recommend using well water as source for our RO systems.
The reasons are as follows:
1. Large particles.
Compared to municipal tap water, the well water is rich of large particles, which will clog the filters easily, and shorten their lifetime significantly.Please note that the filters will still need to be replaced more frequently, even if you have added a pre-filtration system.
2. Composition
The well water has very complicated compostion, and some of them (apart from the large particles) can cause the filter or internal valve to be clogged and prevent the RO system from normal performance.
3. Water pressure
The well water may not provide the feed water pressure that the RO system requires (14.5 psi min.). Furthermore, the water pressure will be even lower after passing through pre-filtration systems.

Yes, the system requires electricity to work. So, an electrical outlet is necessary.

Yes, this reverse osmosis water filter works perfectly with a remineralization filter. All you have to do is buy a suitable remineralization filter and connect it to the system. Simply search for “Waterdrop Remineralization Filter” and add the filter.

The reverse osmosis water filter relies on a semi-permeable membrane to filter out impurities from drinking water. When the tap water is compressed through the RO membrane, it produced pure water and waste water. The ratio of pure water to waste water is called wastewater ratio. 1:1 wastewater ratio means 1 gallon water is wasted per 1 gallon purified, and 2:1 wastewater ratio means 1 gallon water is wasted per 2 gallon purified. The higher the wastewater ratio is, the less waster water produced during the filtration process. During the use of RO water filter, the actual ratio might be lower than the labeled, depending on many factors such as water quality, pH, pressure and temperature.