Yes, sorry typo EPDM.
Since there was comment that they could be pulling off, I took the fitting appart to see if the tube was properly on to the barb. When I initally tightened them I didn't get the gap between the clamp and fitting to 0, as the pressure drop when testing the leaks was fine, after the inspection I did them more.
I have the apaptive pressure on.
When pressure is 250 to 300 mbar then the pressure leak rate is ~8 mbar/min when the pressure is 50 to 100 mbar then the pressure leak rate is < 2 mbar/min.