I paid for two parts, a flapper and a bottom cover. I showed the "customer service" person the bottom cover in that parts diagram in the manual, and asked how to know proper orientation/direction to install it, because the part was too small to tell from the diagram. Customer services wrote back with this answer: "Below is the manual sir." So no answer! I asked again, no response. And his/her job is safe, because there is no way to reach management of any kind in this company. This has happened multiple times. You can order parts and take your best guess which parts might solve your problem. But if you expect any intelligent assistance answering a question, you're wasting your time. Because in some cases, the "parts listing" and manual do not tell the whole story.