Osmosis faucet - how does it work?

Underground osmosis plants are often used for the production of pure drinking water. In order to be able to remove the water from the osmosis system, a separate faucet is needed, or the previously used faucet must be replaced. What types of faucets there are for reverse osmosis systems and how they work is explained here.

Principle of water separation

The reverse osmosis system produces high-purity water. It is mostly intended for drinking only. Although the health effects of osmosis water are more than controversial, using osmosis water for rinsing and cooking would be a waste of water and energy.

Separate removal from a separate faucet is possible, but requires the installation of an additional fitting in the kitchen sink. This is in many cases technically difficult to achieve and also very expensive.

For this reason, there are combination faucets for tap water and osmosis water.

Three-way valves

These fittings have a special mixer tap. Tap water can be taken hot or cold via the tap, and the osmosis water can be removed via another line in the mixer tap.

It is important to make sure that in both of these taps both in the mixer tap and in the tap guide both types of water do not come into contact with each other, but are managed separately. Otherwise, the effect of the reverse osmosis system is canceled if the water in the tap is again contaminated with tap water.

There must also be separate discharge openings at the upper outlet of the faucet to prevent contamination of the osmosis water.

  • Pressure-free fittings

When connecting a fitting it is always important to make sure that it is connected to a non-pressurized water tank or not. This is especially true with combination taps and the conversion.

For connection to a non-pressurized water reservoir (such as a boiler), a low-pressure fitting is required, otherwise the water tank may burst. When connected to a water heater, however, a fitting is required, which is designed for a water connection (high pressure).

Tips & Tricks

For all fittings, you should make sure that they have standardized connections according to DIN.

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