Basic plumbing tools worth owning
A short, honest plumbing kit for homeowners: what each tool actually does, when it saves a service call, and when to put the tool down and shut the water off.
Household plumbing failures are dominated by a handful of repeats: a running toilet, a slow drain, a dripping faucet, a leaking supply connection, and a stuck shutoff valve. Nearly all of them are within reach of a homeowner with seven tools and an afternoon.
The list below is deliberately short. Plumbing rewards a few good tools and punishes a drawer of adapters you do not understand.
Before anything: know your shutoffs
Find the main water shutoff today, not during a leak. It is usually where the supply enters the house — a basement wall, a crawlspace, a utility closet, or a meter pit near the street. Turn it fully off and back on once a year so it does not seize.
Then find the fixture stops: the small oval or round valves under each sink and behind each toilet. If a fixture stop will not turn or weeps when you use it, that is the repair to schedule before it becomes an emergency.
Safety warningTurn the water off before opening any connection, and open a low faucet afterward to relieve pressure. If you have a water heater, do not run it dry — shut off its supply and power if the main is off for long.
The seven-tool kit
This handles the common failures without turning into a plumbing hobby.
- Tongue-and-groove pliers (10" and 12") — the workhorse for supply nuts, trap nuts, and shutoff bodies.
- Basin wrench — the only practical way to reach the mounting and supply nuts hidden behind a sink bowl.
- Adjustable wrench — compression fittings and hex bodies where you want a flat, controlled grip.
- Flange plunger for toilets and a flat cup plunger for sinks and tubs — they seal differently and are not interchangeable.
- Closet auger (toilet) and a 25 ft drum auger (sinks and tubs) — clears what a plunger cannot without chemicals.
- Thread seal tape (PTFE) and pipe joint compound — tape for tapered threads, compound where a manufacturer calls for it. Never on compression or flare fittings.
- Bucket, towels, and a headlamp — not optional, and the reason most under-sink repairs stay clean.
The repairs this kit actually covers
A running toilet is usually a flapper that no longer seals or a fill valve that will not shut off. Both are inexpensive parts and a fifteen-minute job with no tools beyond your hands and a pair of pliers.
A slow bathroom sink is nearly always hair on the pop-up stopper — pull the stopper, clear it, reinstall. A slow kitchen sink is nearly always grease in the trap — a bucket and a pair of tongue-and-groove pliers gets the trap off.
A dripping compression-style faucet is a worn seat washer or O-ring; a cartridge faucet needs the cartridge that matches the brand and model, which is why the model number on the underside matters.
A weeping supply line is usually a braided line at the end of its service life. Replace, do not tighten — over-tightening a braided line cracks the ferrule.
What to leave to a licensed plumber
These are not skill-gated so much as consequence-gated.
- Anything involving gas piping, including water heater gas connections.
- Soldering or repiping inside a finished wall or ceiling.
- Main line and sewer backups, especially with multiple fixtures backing up at once.
- Water heater replacement, T&P valve issues, or any scalding-temperature symptom.
- Any leak inside a wall cavity, or a persistent damp spot with no visible source.
- Sump pump failure during an active water event.
Safety warningChemical drain cleaners damage older traps and pipes, and they create a caustic hazard for whoever opens the line afterward. If you have used one, tell the plumber before they start.
Materials worth keeping on the shelf
A universal toilet flapper, a spare fill valve, a pair of braided stainless supply lines (one sink length, one toilet length), a tube of kitchen and bath silicone, and a roll of thread seal tape. Under $50 total, and it turns three of the five most common failures into a same-day fix.
Tools we recommend for this
Chosen for usefulness, compatibility, safety and value — never for commission rate. Prices are typical US ranges and change often.
Telescoping basin wrench
There is no substitute. Faucet mounting nuts sit four to six inches behind the bowl where no other wrench reaches.
- Good for
- Faucet replacement, supply line connections under a sink
- Skill level
- Intermediate
- Typical price
- $15 – $35
SafetyShut off the fixture stops and drain the line before loosening any nut.
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Flange plunger (toilet) + flat cup plunger (sink)
The flange seals a toilet's curved outlet; the flat cup seals a flat sink or tub drain. Using one for the other is why plunging often 'does not work'.
- Good for
- Clogged toilets, sinks, tubs
- Skill level
- Beginner
- Typical price
- $12 – $30 each
SafetyDo not plunge after pouring chemical drain cleaner — splash-back is caustic.
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3 ft closet auger with a vinyl bowl guard
Clears toilet clogs a plunger will not, and the guard keeps the cable from scratching the porcelain.
- Good for
- Toilet clogs beyond the trapway
- Skill level
- Intermediate
- Typical price
- $25 – $55
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Braided stainless steel supply lines (pair)
Rubber and plastic supply lines age out and split. Braided stainless is the standard replacement and costs less than a mop.
- Good for
- Toilet and sink supply connections
- Skill level
- Beginner
- Typical price
- $10 – $25
SafetyHand-tighten plus a quarter turn. Over-tightening cracks the nut and causes the leak you were preventing.
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