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18. März 2026

Shut off water supply after use: why and how to connect the ozone cleaner safely

Shut off after use. That is the advice Ozonreiniger gives to all users of the ozone cleaner. It is simple, immediately actionable and completely eliminates the pressure-related risk of leakage. This article explains why this is the right measure, how to carry it out and what difference it makes compared to a connection left permanently open. The core of the problem is static pressure. When the ozone cleaner is not in use but remains connected to the mains water supply, the internal circuit is continuously under the full mains water pressure. There is no flow to distribute or relieve the pressure. The pressure acts continuously and statically on all internal connections: hose couplings, valves and connection points. This is a fundamentally different load than the dynamic pressure that occurs during use, when water flows through and the pressure load is distributed across the system. Static pressure is sustained and concentrates on the weakest connection in the circuit. At pressure exceeding the three bar specification, the chance of leakage under static load is considerably greater than during use. Most of the leakages we have seen occurred while the device was not in use but remained connected. Shutting off after use completely removes the static pressure load. As soon as the water supply is shut off, pressure in the internal circuit drops quickly to zero. There is no more pressure acting on the connections. The risk of leakage in the period between uses is thereby eliminated. The action is simple: turn off the tap that supplies water to the ozone cleaner after each use. That can be the tap directly next to the device, or the valve in the pipe group feeding the relevant connection point. The exact location of that valve differs per installation, but in most situations it is the nearest manual tap on the water pipe. The effect is immediate: as soon as the tap is closed, the circuit is no longer under pressure. No waiting time, no additional steps, no tools. For users who use the ozone cleaner multiple times per day, shutting off after each session is the recommended practice. For users who use the device less frequently, shutting off after use is even more important: the longer the device hangs unused on the network, the longer the period of static pressure load. This article describes the reason behind the advice, the correct execution and the combination with other measures such as measuring and a pressure reducer. Shutting off after use is the most direct and most reliable measure that every user of the ozone cleaner can apply immediately regardless of location connection type or the measured water pressure at the site Shutting off after use is the most direct and most reliable measure that every user of the ozone cleaner can apply immediately regardless of location connection type or the measured water pressure at the site Shutting off after use is the most direct and most reliable measure that every user of the ozone cleaner can apply immediately regardless of location connection type or the measured water pressure at the site Shutting off after use is the most direct and most reliable measure that every user of the ozone cleaner can apply immediately regardless of location connection type or the measured water pressure at the site Shutting off after use is the most direct and most reliable measure that every user of the ozone cleaner can apply immediately regardless of location connection type or the measured water pressure at the site Shutting off after use is the most direct and most reliable measure that every user

Explanation of the advice to shut off the water supply to the ozone cleaner after use: why static pressure is the greatest risk and how to shut off.

Shutting off water supply after use: the right measure explained

Why static pressure determines the risk

Static pressure has no outlet and acts continuously on all connections. This is the core of the problem. Official update: water supply ozone cleaner pressure update.

 

How to shut off

After each use, close the nearest manual tap on the water pipe. If there is no direct valve, the valve in the meter cupboard is an alternative.

 

Effect on work routine

Cleaning performance of the ozone water machine does not change. Only the pressure load on the inactive circuit is removed.

 

Applies at low pressure too

Shutting off is worthwhile regardless of measured pressure. How to measure is in the article on measuring water pressure home or commercial.

 

Combining with other measures

For structurally excessive pressure, complement with a pressure reducer: pressure reducer ozone cleaner solution. More on consequences: excessive water pressure consequences ozone cleaner. Questions? the contact page.

 

Costs and affordability

Shutting off after use costs nothing. Full overview: ozone water knowledge guide.

 

Why does Ozonreiniger advise shutting off the water supply after use?

When the ozone cleaner is not in use but remains connected, the internal circuit is under static pressure with no flow. Shutting off after use completely eliminates that static pressure load.

How do I shut off the water supply to the ozone cleaner?

After each use, close the nearest manual tap on the water pipe. If there is no direct valve, the valve in the meter cupboard is an alternative.

Does shutting off affect cleaning performance?

Yes. Water pressure is variable and can temporarily exceed three bar through night-time peaks. Shutting off also covers those temporary exceedances.

Is shutting off after use sufficient if pressure is structurally above three bar?

Shutting off eliminates risk during inactive periods completely. For structurally excessive pressure, a pressure reducer is the complementary permanent solution.
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