1. Before deflation, prepare a piece of plastic hose (diameter just enough to fit over the deflation valve), and a container for water (basin, bucket, etc.).
2. Close all valves except the water inlet valve. Generally, the valve handle is parallel to the direction of the pipeline to open, and vertical to close.
3. Put one end of the plastic hose on the air release valve port, and place a container for water under the other end.
4. Slowly unscrew the air release valve on the water inlet pipe of the water separator, and perform the first air release until the water without a lot of bubbles is released, and then close the air release valve.
5. Open a set of water inlet and return water valves on the branch of the water separator, and then open the air release valve on the water inlet pipe of the water separator again until the water without a lot of bubbles is released.
6. Repeat the above operation until all branches of the manifold are deflated.