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Why Purify the Water, and What is The Best Method for Healthier Water?

  • Clean water without a lime!
  • Healthier with clean drinking water. Avoid calcification in the body and the espresso machine.
  • Avoid kidney stones and gallstones. Most 'drink' 180kg stone in life.
  • Water from the supermarket is expensive and heavy to carry and also not as clean as osmosis water.

There is probably a reason that millions of Americans have reverse osmosis under the sink and clean water through a small extra faucet.

Reduction of harmful substances

The filter reduces the content of heavy metals, chlorine, nitrates, pesticides, drug residues, herbicides, hormones, etc.

Advantages of osmosis water

  • It contains fewer harmful substances in smaller quantities. The body can better dispose of waste if you drink clean water.
  • Drinking water tastes better. Tea and coffee taste better.
  • Descaling equipment (espresso machines, washing machines, dishwashers, etc.) is over.
  • I have significantly less tartar after drinking osmosis water for over a year.
  • Windows are easier to clean and get cleaner. Therefore, I and window cleaners use reverse osmosis water. My car windows are being washed with osmosis water, as long as it is not freezing.
  • Aquarists use osmosis water for the aquarium.
  • Many industrial plants use large osmosis systems.

Drinking water

Some authorities tolerate up to 500ppm, 500-1000 is not right, and 1.000ppm is harmful (limit WHO). I would react if I knew that my tap water measured more than 500ppm. I have measured 350ppm in several places in the metropolitan area and 500ppm in my summerhouse.

It is recommended to buy a meter so that you can check the water in different situations. You can see how well the filter and membrane acts, and thus assess when it is time to change layers or filters. Also relevant to the aquarium, window cleaners, spa, pool, flowers, fertilizer, and other inputs.

Power of advertising

Billions of plastic bottles with water are sold every year. A Danish newspaper wrote in 2010: "Spring water is pure cheating."

I cleanse my tap water

I bought it after a kidney stone attack, a small water purification unit consisting of 2 filters and a membrane. It is easier and much cheaper than buying water. It works on a principle known as reverse osmosis.

How pure is your water?

You can measure the water content of different substances with a TDS meter. It measures particles in the water, which is NOT water. My tap water shows 340ppm.

If I boil my water, it shows 230ppm, but the taste is not much better, treated with my water filter, it shows 10ppm—no need to be a professor of microbiology to understand this.

Benefits of osmosis water

  • It is cleaner than tap water, contains significantly fewer harmful substances in much smaller quantities.
  • Decalcification is over.
  • Windows are easier to clean. Therefore window cleaners use reverse osmosis.

You can buy a cheap simple water filter connecting to the faucet.

  • "It is better to use any water filter than no filter; otherwise, you will be the filter!" (Dr. Mercola)

Which cleaning method is the best?

Reverse osmosis has proved the best and most economical method to purify water. The technique has been known since 1950.

Filter and membrane

A reverse osmosis system typically consists of 2-3 filters followed by a membrane. The membrane is expensive, so you try to filter as much as possible before the water comes to the diaphragm to make it last as long as possible.


Without a membrane, no reverse osmosis! Both filters and membranes are designed as cylinders and are placed into a plastic container, and the vessels are connected with thin plastic hoses. As shown, a membrane consists of many thin layers of film with ultra-small pores, which, in principle, only water molecules can slip through.

As mentioned above, the membrane is the most expensive part, and therefore one attempts to purify the water as much as possible before the water reaches the membrane.

BEFORE the membrane first, a sediment filter is added and then one or two carbon filters and then the membrane, and the pure water comes out of the membrane housing, which also deflects the wastewater.

The membrane is placed in a membrane housing, and this, therefore, has two outputs: the farthest discharging the pure osmosis water. Membranes are produced with different capacity, identified by Gallons Per Day.

Connections to the water supply

Any unit can be connected to the water supply in many ways, but each system is designed or intended for a specific connection method. Direct Flow systems require a 3/8" hose, which can handle a significant flow rate.

On the faucet

The most natural and most comfortable solution: Connect to the faucet with this adapter. 

Water pipe

The larger systems are supplied with this adapter and can be connected to a water pipe and a corresponding ball valve that can be either to a 1/4" or a 3/8" hose.

With the small valve with the handle, you open/close for the water to the osmosis system.

Is tap water not clean enough?

Since the year 2,000, still, an increasing amount of harmful substances in groundwater and drinking water have been found. I will gladly pay a little to be sure to get clean drinking water.

Who invented and developed the "reverse osmosis"?

The possibility of reverse osmosis was first discovered by scientist and researcher Sourirajan at the University of California in the 1950s. The first used for desalination of seawater reverse osmosis was so promising that the U.S. government launched an extensive research program in which many large companies were involved. Within eight years of research and an investment of over $ 33 million was the most modern and most advanced water treatment technology in our time.

"Reverse osmosis steals important minerals from the water."

This claim has been debated long and is often argued by critics of water purification systems such as reverse osmosis. Water contains only inorganic minerals, and our body has difficulty in absorbing these.

We absorb, on the contrary, organic minerals from the food we eat. If you eat healthily and further take vitamins/mineral supplements, you are well covered.

The Amer. The navy has used reverse osmosis to produce drinkable water from seawater since 1950.

Is my water pressure high enough?

GPD (Gallons Per Day) vs. LPD (Liters Per Day)

1 US Gallon = 3,78 liter. Often you see these numbers:

  • 050 GPD = 190 LPD
  • 075 GPD = 280 LPD
  • 100 GPD = 380 LPD
  • 125 GPD = 470 LPD
  • 300 GPD = 1.100 LPD
  • 400 GPD = 1.500 LPD

I use the GDP figures intentionally. Manufacturers are using GPD, i.e., located on the membrane itself. GPD is used in most countries. I urge you to use GPD. I know that many people, especially in Europe, have used and still use liters. But apart from that, it's my idea with the abbreviation LPD;-)

The above numbers look fine, but it is wishful thinking without a booster pump. It is measured at a certain temperature (usually at 25 °C) and fairly high water pressure (usually 4-6bar). Realistic is maybe 70% of the above values at 3 Bar. 

But the worst is the fact that lots of dealers are uncritical indicates these figures. This corresponds to the car dealer only selling cars by saying: "This car can run 250 km/hour." See also what I have written about water pressure.

A low-pressure membrane produces less wastewater than other membranes.

TFC means Thin Film Composite.

Water Pressure reverse osmosis

The pressure is measured in psi and bar. 14,5psi = 1bar

Most reverse osmosis systems without a booster pump should preferably have a water pressure of 3.0 Bar. If the water pressure is below 3.0bar, the water quality drops, and the number of wastewater increases. Therefore reverse osmosis systems are typically sold with and without a pump.

I have tried to find a small plant for people living in the big cities on the 4th and 5th floor, where the water pressure is quite low. Until now, I got the same answer: the booster pump is necessary.

Systems with booster pumps require 1bar at input water, and the pump increases water pressure to the optimum of the plant. Some plants are built with a manometer system.

Minimum water pressure is 3.8 bar in the pipes located 1.2 m below the ground. If the first floor is 3m above ground, subtract 0.42 bar of the pressure. In addition, there is pressure loss in the water meter and the internal wiring in the house, which will further reduce the pressure.

I bought a manometer in Denmark and tested and measured the water pressure in my apartment in Copenhagen, the first floor: 3.5, so this fits very well with the information from my company. If there is a 3meter between each level of the house, there is a pressure drop of 0.3 per floor.

When to change filters and membranes?

The more often you change your filters, the better protected is the membrane, and the longer the membrane lasts, and since the membrane is significantly more expensive than the filters, it makes good sense.

The 10" filters for the large filter housings have a capacity of 11.000 liters or 3.000 Gallons. The small inline filters for the small three stages systems have a capacity of 6.000 liters or 1.500 Gallons. Remember to calculate with your wastewater factor. If you make 100 liters of osmosis water a week with a membrane having a wastewater factor of 3, you have 100 +300 = 400 liters of water a week through your filters. That makes 400 * 52 = 20,000 liters a year.

Otherwise, you measure when what should be changed:

Immediately after installing a new system, you measure:

  1. tap water, as it is. This value usually is constant.
  2. The value BEFORE the membrane, ie, after the pre-filters (if this value increases with time, it's time to change filters). This requires that you have a meter, as shown below, DM-1.
  3. The value AFTER membrane (if this value increases and the values for the pre-filters have not changed AND the diaphragm worked for some years; it's time to change the membrane). Membranes CAN hold more than three years, but most shops tell you to change every three years.
  4. The value after the resin filter. If this rises and ALL other values are unchanged, consider whether you want to change resin

The severe user monitors these values permanently, with a DM-1 meter that can measure at two places simultaneously.

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