Plumbing Guide

Common Plumbing Problems & Solutions

Fix common plumbing problems yourself or know when to call a pro. Solutions for clogs, leaks, running toilets, low pressure, and more.

8 min readUpdated June 2, 2026

Clogged Drains

Clear clogged drains with a plunger, drain snake, or enzymatic cleaner—avoid chemical drain cleaners that damage pipes. Bathroom clogs are usually hair and soap; kitchen clogs are typically grease. Pour boiling water with dish soap for grease clogs. Call a plumber if clogs recur frequently or won't clear.

Clogs are the most common plumbing problem. Bathroom clogs usually involve hair and soap buildup—try a drain snake or enzymatic cleaner before chemical drain cleaners (which can damage pipes). Kitchen clogs often involve grease—pour boiling water mixed with dish soap to help dissolve. Plungers work well for toilet clogs. If clogs recur frequently or won't clear, call a plumber for professional drain cleaning.

Running Toilets

Fix a running toilet by replacing the flapper—a worn rubber seal at the tank bottom is usually the cause. Other fixes include adjusting the float or replacing the fill valve. Parts cost $10-30 at hardware stores. A running toilet wastes up to 200 gallons daily, so fix it promptly or call a plumber.

A running toilet wastes up to 200 gallons daily and is usually an easy fix. The most common cause is a worn flapper—the rubber seal at the tank bottom. Other causes include a faulty fill valve, improper float adjustment, or a leaky flush valve. Replacement parts cost $10-30 at hardware stores. If DIY replacement doesn't solve it, call a plumber to diagnose less common issues.

Leaky Faucets

Stop a leaky faucet by replacing worn washers, O-rings, or cartridges—parts cost under $20 and tutorials exist for most faucet types. Turn off water supply valves under the sink before disassembly. A dripping faucet wastes thousands of gallons annually, making this a worthwhile repair.

A dripping faucet wastes thousands of gallons annually. Most leaks are caused by worn washers, O-rings, or cartridges inside the faucet. Replacement parts are inexpensive, and online tutorials cover most faucet types. Turn off water supply valves before disassembly. If you're uncomfortable with the repair or have an expensive or unusual faucet, a plumber can fix it quickly.

Low Water Pressure

Fix low pressure at one fixture by cleaning or replacing the clogged aerator. Whole-house low pressure may be a partially closed main valve, corroded pipes, a hidden leak, or municipal supply issues. Check that your main shut-off and meter valves are fully open before calling a plumber.

If pressure is low at one fixture, the aerator may be clogged—unscrew it and clean or replace it. Low pressure throughout the home may indicate: partially closed shut-off valve (check water meter and main valve), corroded pipes restricting flow, municipal supply issues, or a leak in your system. Widespread pressure problems warrant professional diagnosis.

Water Heater Issues

For no hot water: check your breaker panel (electric heaters) or pilot light (gas heaters) first. Rumbling noises mean sediment buildup—flush the tank annually. Rusty water or tank leaks usually require replacement. Many water heater repairs involve gas or electricity and need professional attention for safety.

No hot water from an electric heater may be a tripped breaker or failed heating element. Gas water heaters may have pilot light issues or thermocouple failures. Rumbling noises indicate sediment buildup—flush the tank annually. Rusty water suggests internal corrosion. Leaks from the tank usually mean replacement is needed. Many water heater issues require professional repair due to safety concerns.

Garbage Disposal Problems

Fix a jammed disposal (humming but not spinning) by turning it off, inserting an Allen wrench into the bottom socket, and rotating the blades to free the jam. A dead disposal may just need the reset button pressed or a breaker reset. Never put your hand inside—use tongs to remove obstructions.

A humming but non-spinning disposal is usually jammed. Turn it off, use an Allen wrench in the bottom to manually rotate the blades, and remove the obstruction with tongs (never your hand). A disposal that won't turn on may need its reset button pressed or a tripped breaker reset. Grinding sounds indicate hard objects inside. Persistent problems or leaks usually need professional attention.

When to Call a Professional

Call a plumber for anything involving gas lines, problems behind walls or under floors, work requiring permits, or issues you cannot diagnose. Also call if problems keep returning despite DIY fixes. Professional repair costs far less than water damage from a failed DIY attempt.

DIY is appropriate for simple, accessible issues you feel comfortable tackling. Call a professional for: anything involving gas lines, problems you can't clearly diagnose, issues behind walls or under floors, work requiring permits, persistent problems that keep returning, and any situation where you're unsure. The cost of professional service is almost always less than the cost of water damage from a failed DIY repair.

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