While an adjustable wrench might work for some connections, groove joint pliers (like the Husky or Channellock ones listed) provide a superior grip and leverage, especially in the tight confines under a sink. They help prevent slipping, stripping nuts, and ensure a more secure, leak-free connection, which is crucial for plumbing tasks.

Always turn off the main water supply to your sink at the shut-off valves underneath before beginning any work to prevent accidental flooding. Place a bucket and towels (like the WYPALL or THE CLEAN STORE cloths) directly under your work area to catch residual water. Good lighting, such as a headlamp or flashlight, is essential for clear visibility and safe work in the dark cabinet.

Yes, it's generally beginner-friendly as it involves disconnecting and reconnecting parts. The 3-hour estimate is reasonable for most, but working in tight, often uncomfortable spaces under the sink can be challenging. Common beginner hurdles include corroded or overtightened old connections and ensuring new connections are perfectly sealed to prevent leaks.

The most common causes of leaks are improperly tightened connections or improperly seated/missing rubber washers or gaskets. First, ensure all threaded connections are snug – hand-tighten, then give a quarter to half-turn with pliers. If a leak persists, disassemble the leaking connection, inspect the washer for correct placement and condition, and re-tighten carefully.