Manual working process: After the water filter is connected to the pipeline system, the water enters the water filter from the lower inlet. When the impurities in the water pass through the core, the volume is larger than the core hole, and the enthalpy is trapped on the core. When the quantity is reached, a certain pressure difference is generated between the inlet and outlet. (The filter has different diameters and different pressure difference, generally 0.15Mpa). Manually open the drain valve, start the blowdown, turn the handle, rotate the direction of the counterclockwise rotation, rotate one frame every 10 seconds - 30 seconds, the handle points Each recess is fixed until one rotation, the drain valve is closed, and manual draining is completed.