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https://www.hydroplan.gr/ Check valves for rainwater and dirty water (with or without solids). With motorized flaps and control panel, With stainless steel flap, With two check valves. Installation methods: in visible pipe networks, in the floor, underground in a well. For more information, visit: https://www.hydroplan.gr/ #hydroplan #hydroplan_sa #ydroplan FB account: / hydroplan-498697806926834 IG account: / hydroplan_sa