Manual rEvo III
23
time you have doubts if the orifice is properly functioning (and you do not have access
to a flow meter). In case of an obstructed orifice the time-interval needed to drop
down the pressure would be much longer. If the flow rate is too high, that time-
interval would be much shorter!
The orifice can easily be changed: it simply unscrews. After replacing the orifice you
must be careful to always check the flow rate!