Backflow protection (EN 1717)

Protection of drinking water by liquid category

Security device (controllable check valve pipe breaker etc.) that protects drinking water against backflow. Required security type is determined by liquid category according to DS/EN 1717 (referenced from DS 439:2024) — choose type according to contamination risk and applicable rules.

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Backflow protection (EN 1717)

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High water lock

Copper pipe