What specifications should be confirmed before buying toilet tank repair parts in bulk?

Before bulk purchasing toilet tank repair parts, buyers should confirm the toilet tank type, flush valve outlet size, fill valve thread size, button hole diameter, water inlet position, and installation height. For repair kits, it is also important to check whether the toilet uses a top push button, side push button, or flush handle. Clear specifications help reduce mismatch problems and make bulk replacement easier for wholesalers, distributors, and repair service companies.