Ozone produced by the ozone generator is fed to the water of the Koi pond. Ozone strains the material. If ozone gets in contact with water, nitrid acid is produced straining the valves which can become leaky and thus damaging the expensive ozone generators.

WEH solution:
The extremely leak tight WEH mini check valve type TVR2 out of resistant material has a low cracking pressure and protects your ozone generator. The mini check valve can also be delivered with other sealing material for applications in the medical and food industry and for glycol-based media and sea water.