The Hydraloop water recycling system is certified

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The certification confirms that the reuse water quality offered by Hydraloop meets the water quality requirements of the most stringent international standards. Certification has been done by PIA in Germany, which is an internationally accredited and notified testing body for the certification of wastewater treatment products. 

https://www.pia-gmbh.com/en/pia/pia-international#pia-quality.