1, bad filter drainage pressure drainage and manual drainage in two ways. Manual water drainage when the water level reach the filter below the level prior to discharge.
2, pressure adjustment, turn the knob before first pull up, then rotate, press the Rotary button for positioning. Rotate the knob to the right to increase the outlet pressure, rotate to the left to reduce the pressure. Pressure should be gradually adjusted evenly to the required pressure value should not step regulation in place.