Hi, when I was removing my toilet cassette from its home, I noticed a little spring hanging down from the upper part of the housing. On touching the spring it fell out, it is only about an inch long. I can see where one end of the spring went but cannot decide the correct route of the fitment. Also as at the moment everything is working so I am not sure what it does. Has anyone got any ideas?.eckcanThanks for replys I have finally got around to solving the problem. After failing to find answer decided to clean out the cassette compartment and lo I found a tag that had broken of , where the spring attaches to . I removed a cover, plunger came out and I was able to glue with extra strong adhesive the tag back on. Once it was all back together it works well.Not easy to see but one more step on the discovery trail.eckcan