This is the tutorial video to demonstrate how to remove an end cap which is got stuck inside the vessel near the retaining ring groove sitting area. You can see one of the push-on of end cap is little bit inside the retaining ring groove and the other push-on, other side is little bit outside, outward, towards the vessel. So take arable marit first. The marit should not be metallic hammer, it should be arable marit. Hold this like this. Tap gently at all four pordrens. Specifically tap at the side which is coming outside not moved inside. Like this you have to tap and remove the vessel.