Our safety units are EN1487 and NF079 compliant. The security valve is with a membrane, it’s in order to allow the hot water by the drain outlet when the pressure has reached 7 bar inside the water-heater. It also allows, in case of termic regulation failure, the evacuation of the over-heated water or steam by limiting the overpressur inside the water-heaters to 8.4 bar maximum. Our safety units are equiped of a non-return valve and are compliant of the NF anti-pollution regulation. All our safety units are guaranteed for 2 years from the date of fabrication.