Yes, this is a very common beginner-level DIY project. The most challenging part is often working in tight spaces. Most DIYers can complete it within 1-2 hours, especially if they have the replacement parts readily available.

While an adjustable wrench is the primary tool, a utility knife can be helpful for trimming the refill tube to the correct length. A bucket for any residual water and the specified HDX Multi-Purpose Sponge for thoroughly drying the tank are also highly recommended to prevent mess.

Leaks commonly occur from an improperly tightened water supply line connection or a misaligned washer on the new fill valve shank. Ensure all connections are hand-tightened first, then given a quarter to half turn with the adjustable wrench, and verify that the fill valve gasket is seated correctly against the tank bottom.

Always turn off the water supply behind the toilet and flush to drain the tank completely before beginning. Use the sponge to remove all remaining water from the tank to prevent spills. It's also a good idea to wear gloves and have adequate lighting to clearly see all connections.