A dripping trap under the kitchen sink or a toilet that will not stop running rarely requires a full truck of specialty gear. It does require the right must have plumbing tools, sized for the fittings and materials in front of you. Start with a reliable core kit, then add specialty tools when your projects move from fixture repairs into supply lines, drain work, and pipe replacement.
Must Have Plumbing Tools for a Dependable Repair Kit
1. Tongue-and-groove pliers
Tongue-and-groove pliers are the first adjustable gripping tool most homeowners should buy. Their wide jaw range handles slip-joint nuts, trap adapters, large compression fittings, and many faucet connections. A 10-inch pair is a practical everyday size, while a 12-inch pair provides more leverage under sinks and around larger drain fittings.
The trade-off is surface damage. The serrated jaws can scar chrome, brass, and plastic if you squeeze too hard. Wrap finished parts with a rag or use smooth-jaw pliers when appearance matters. For stubborn galvanized fittings, however, the aggressive grip is exactly what makes this tool valuable.
2. Adjustable wrench
An adjustable wrench gives you controlled leverage on hex nuts without carrying a full set of open-end wrenches. It is especially useful for faucet supply lines, shutoff valves, toilet fill-valve connections, and compression fittings. A 6-inch wrench fits tight cabinet spaces; an 8- or 10-inch model covers more common household work.
Adjust the jaw until it fits snugly, then pull rather than push whenever your position allows. A loose wrench rounds soft brass nuts quickly. Keep the fixed jaw on the side receiving the force for a more secure bite.
3. Basin wrench
Replacing a kitchen or bathroom faucet becomes frustrating fast without a basin wrench. Its long shaft and pivoting jaw reach retaining nuts tucked high behind the sink bowl, where a conventional wrench cannot turn. This is one of those tools that may sit unused for months, then saves an hour of awkward work on a single faucet installation.
Choose a basin wrench with a sturdy telescoping shaft and a jaw that reverses direction for tightening and loosening. It is mainly a fixture-installation tool, so renters focused only on basic drain repairs can delay this purchase. Homeowners planning a bathroom or kitchen refresh should buy one before removing the old faucet.
4. Pipe wrench
A pipe wrench is built for steel and iron pipe, not polished fixture hardware. Its hardened, toothed jaws bite into round pipe and fittings, giving you the leverage needed to loosen threaded galvanized connections. A 14-inch model is the common all-purpose choice for residential repairs.
Use it carefully. The jaws will mar copper, chrome, and plastic, and excessive force can crack old fittings inside a wall. On threaded pipe, use two wrenches whenever possible: one turns the fitting while the second holds the adjacent pipe back. That counterhold prevents torque from traveling into a fragile connection.
5. Tubing cutter
A tubing cutter makes clean, square cuts in copper, CPVC, and some thin-wall plastic pipe, depending on the cutter design. Clean cuts matter because a crooked or crushed pipe end can compromise a push-to-connect fitting, a compression joint, or a soldered connection.
For copper, tighten the cutting wheel gradually and rotate the tool around the pipe. Over-tightening can deform the tube. Many cutters include a fold-out reamer, which removes the internal burr left after cutting. Use it. Burrs restrict water flow and can create turbulence that contributes to noise or wear over time.
6. Deburring tool and pipe reamer
A dedicated deburring tool may look optional next to a tubing cutter, but it earns its place whenever you work with copper, PEX, or CPVC. It removes sharp edges from the inside and outside of a cut pipe. That protects O-rings in push fittings, helps pipe slide fully into fittings, and improves the quality of soldered copper joints.
This is a low-cost tool with a high payoff. If you are installing a few shutoff valves or replacing sections of supply pipe, clean preparation is often the difference between a repair that holds and one that leaks at first pressurization.
7. PEX cutter and PEX crimp tool
PEX has become a common choice for residential water-supply repairs because it is flexible, freeze-resistant compared with rigid pipe, and fast to install. If PEX is part of your project, use a purpose-built PEX cutter. It makes a clean 90-degree cut without flattening the tube.
The connection tool depends on the system you choose. Copper crimp rings need a crimp tool and a go/no-go gauge. Stainless clamp rings need a cinch tool. Expansion PEX requires a dedicated expansion tool and compatible fittings. These systems are not interchangeable, so match the tool to the pipe and fitting method before buying materials. For one small repair, push-to-connect fittings can reduce tool costs, but they are typically more expensive per fitting than crimp or clamp connections.
8. Closet auger
A closet auger is made specifically for toilet clogs that a plunger cannot clear. Its enclosed cable passes through the trapway while protecting the porcelain from direct contact. The bent guide tube and crank give it far more control than a standard hand snake.
Do not reach for it first. A flange-style toilet plunger is faster and safer for ordinary clogs. Use the auger when plunging fails or when you suspect a solid object has lodged in the toilet. Feed the cable slowly, avoid forcing it, and retract it carefully to prevent splashing.
9. Hand drain auger
For bathroom sinks, tubs, showers, and laundry drains, a hand drain auger is one of the most useful diagnostic and clearing tools you can own. A 25-foot cable handles many branch-drain clogs caused by hair, soap buildup, and small debris. Choose a model with a durable drum and a cable thickness appropriate for smaller household drains.
Remove the sink stopper or access the trap before sending a cable down the drain. Chemical drain cleaners can remain in the line and splash back while you work, so avoid mixing chemicals with mechanical drain cleaning. If the cable repeatedly stops far beyond the trap or several fixtures drain slowly together, the problem may be in a larger branch or main line. That is a good point to call a plumber or use a larger machine designed for the pipe size.
10. Plunger with the right cup
A plunger is basic equipment, but the wrong style wastes time. A cup plunger works best on flat sink and tub drains. A flange plunger has a fold-out rubber sleeve that seals inside a toilet bowl outlet. Keep one of each, and reserve the toilet plunger for toilet use.
The key is sealing the opening before you start pumping. On a double-bowl sink, block the second drain. On a sink with an overflow, cover the overflow opening with a wet rag. That allows pressure to work on the clog instead of escaping through another opening.
11. Flashlight or headlamp
Most plumbing repairs happen in cabinets, crawlspaces, utility rooms, or behind appliances where overhead lighting is poor. A compact LED flashlight is useful, but a headlamp is often better because both hands stay free while you hold a fitting, wrench, or inspection mirror.
Good lighting helps you identify the actual source of a leak. Water often runs along a pipe or fitting before dripping from the lowest point, so the visible drip is not always the failed connection. Dry the area, illuminate it well, then use a paper towel to trace moisture back to its origin.
12. Safety glasses, gloves, and a bucket
These are not glamorous purchases, but they belong in every plumbing kit. Safety glasses protect your eyes from debris, drain water, and unexpected spray. Nitrile gloves improve hygiene during drain work, while coated work gloves help when handling rough pipe or cast-metal fittings. A small bucket, absorbent towels, and a shallow drain pan limit water damage when you disconnect traps or supply lines.
Before opening any connection, shut off the nearest valve and test that the water is actually off. Open the faucet to relieve pressure, then place the bucket below the fitting. This simple routine prevents a minor repair from turning into cabinet damage or a soaked floor.
Build the Kit Around the Work You Actually Do
For routine household maintenance, start with tongue-and-groove pliers, an adjustable wrench, a flange plunger, a hand auger, a flashlight, and basic protective gear. Add a basin wrench when replacing a faucet, and add PEX-specific tools only when you are repairing supply lines. A pipe wrench and tubing cutter make more sense for older threaded plumbing or planned pipe work than for occasional fixture repairs.
Buy tools that fit your likely projects, not every tool on a plumbing supply shelf. A well-chosen kit lets you isolate leaks, clear common clogs, replace worn fixtures, and make cleaner repairs without improvising with tools that damage fittings. Keep it organized near your shutoff-key and cleanup supplies, and the next small plumbing problem will start as a controlled repair rather than an emergency.