Squeeze showers in kitchens: an often underestimated risk of legionella

In kitchens of restaurants, residential care centers, schools, cultural centers, and banquet halls, among others, squeeze showers are often used to wash dishes or rinse other (contaminated) materials. They seem harmless, but in practice, they pose an increased risk for the growth and spread of Legionella bacteria .

Why squeeze showers pose a risk

Squeeze showers consist of a flexible hose with a spray nozzle used to wash dishes. This type of use increases the organic load due to contact with dirty sinks, food residues, and grease. Without targeted cleaning and thermal management, this increases the risk of bacterial growth. When the squeeze shower is then used, Legionella can be inhaled through the water mist—with potentially serious consequences such as legionellosis (potentially fatal pneumonia).

A shared responsibility

Although the risk in kitchens is sometimes underestimated, there are not only health-related but also legal implications . When squeeze showers are used by employees or staff, they fall under the Welfare Act . Employers have a duty to control risks such as Legionella (biological agent group 2) and protect their employees.

Three essential steps for safe use

1. Correctly setting the hot water system: Ensure the hot water temperature is set correctly. Hot water must be at least 60°C at the production line and at least 55°C at the draw-off point to prevent Legionella growth. Also check the circulation and avoid dead pipes.

2. Minimum weekly use . The squeeze shower must be used at least weekly to prevent stagnation. Prolonged downtime significantly increases the risk of contamination. If prolonged downtime is unavoidable, it is recommended to thermally flush the tap before use (or systematically).

3. Monitoring water quality. Even with proper installation and regular use, monitoring remains crucial. Therefore, sampling and analysis are essential. It has often happened that, despite frequent use, Legionella bacteria were still found in squeeze showers.

Conclusion

Squeeze showers in kitchens are traditionally used and monitored frequently, but they deserve more attention within a sound Legionella policy. The risk can be significantly reduced by using the correct technical settings , usage patterns , and quality monitoring .

Would you like more certainty about the safety of your installation? We're happy to help with advice, sampling, and guidance in developing or fine-tuning your Legionella prevention plan.