Plumbing problems are part of every homeowner’s life. Some are easy to fix yourself in minutes. Others need a professional. This guide walks you through the 10 most common plumbing issues, what causes them, and exactly what to do about each one.
01. Dripping Faucets
A dripping faucet is one of the most annoying — and wasteful — plumbing problems. Even one slow drip can waste hundreds of gallons of water every year. The good news? This is usually one of the easiest problems to fix yourself.
The most common cause is a worn-out rubber washer inside the faucet. Every time you use the tap, the washer presses against a metal seat. Over time, it wears down and stops making a watertight seal. Water then slowly escapes — drip by drip.
How to Fix It
- Turn off the water supply valve under the sink or at the main
- Remove the faucet handle — usually held by one screw under a decorative cap
- Locate the old rubber washer inside and take it out
- Replace it with an identical new washer from any hardware store
- Reassemble the faucet and turn the water back on
02. Running Toilet
If your toilet keeps making a running or hissing sound even when no one flushed it, water is leaking from the tank into the bowl. This can waste up to 200 gallons of water a day — a huge hit to your water bill.
The most common culprits are a worn flapper (the rubber seal at the bottom of the tank) or a faulty fill valve. Both are cheap parts and surprisingly simple to replace.
How to Fix It
- Lift the tank lid and listen/look — is water overflowing into the overflow tube?
- If yes, adjust the float arm downward so the water stops lower
- If no, the flapper is likely the problem — unhook it and take it to the hardware store
- Buy an identical flapper, snap it on, and test by flushing
- If problems continue, replace the entire fill valve — kits cost around $10–$15
03. Slow Draining Sink
Water pooling in your sink and draining very slowly is almost always caused by a buildup of hair, soap scum, grease, or food particles. In bathroom sinks, hair is usually the main villain. In kitchen sinks, it’s grease and food waste.
Before you reach for chemical drain cleaners (which can damage your pipes over time), try a few simpler methods first.
How to Fix It
- For bathroom sinks: use a drain snake or a simple hair-catcher tool to pull out clogs
- Pour a mix of baking soda + white vinegar down the drain, wait 15 mins, flush with hot water
- For kitchen sinks: avoid pouring grease down the drain — it solidifies in pipes
- Use a plunger with a flat base (cup plunger) for stubborn clogs
- Clean the P-trap (the curved pipe under the sink) — it often collects debris
Know When to Call a Professional
Many plumbing problems are safe to DIY. But if you ever see water damage behind walls, sewage smells throughout the house, or no water at all — stop, and call a licensed plumber. Trying to fix major issues yourself can make things much worse and much more expensive.
04. Clogged Toilet
A clogged toilet is unpleasant but very common. Most clogs happen when too much toilet paper or non-flushable items (wet wipes, cotton pads, etc.) are flushed. The toilet will fill up and may overflow if not dealt with quickly.
How to Fix It
- Use a flange plunger (the kind with a rubber extension at the bottom) — it fits toilet drains better
- Place it over the drain and pump firmly 10–15 times in a row
- If plunging fails, use a toilet auger (a flexible drain snake) to break up the clog
- Never flush wipes, cotton products, or paper towels — even “flushable” wipes cause clogs
- If the toilet overflows, shut off the water valve behind the toilet immediately
05. Low Water Pressure
When the water barely trickles out of your tap or showerhead, it’s frustrating. Low water pressure can be caused by a clogged aerator (the tiny screen at the end of the faucet), sediment in the showerhead, or even bigger pipe problems in your home.
How to Fix It
- Unscrew the faucet aerator and clean or replace it — costs less than $5
- Soak your showerhead in white vinegar overnight to dissolve mineral buildup
- Check if low pressure affects only one tap or the whole house
- If it’s whole-house: check your main shut-off valve is fully open
- Call a plumber if pressure remains low after these steps — there may be pipe corrosion or a leak
06. Leaky Pipes
Leaky pipes are more serious than a dripping faucet. They can cause water damage to walls, floors, and ceilings, lead to mold growth, and waste enormous amounts of water. Leaks usually happen at pipe joints or at points where pipes have corroded over time.
How to Fix It
- As a quick fix, use pipe repair tape or a pipe clamp to stop small leaks temporarily
- Turn off your water supply before attempting any repair
- For leaking joints, tighten fittings or replace the joint connector
- Replace sections of corroded pipe — a plumber is recommended for this
- Check under sinks and around toilets regularly for early signs of moisture or staining
07. Clogged Shower Drain
If water is pooling around your feet while you shower, the drain is clogged. Hair is almost always the cause. Over weeks and months, it binds with soap and builds up into a thick plug that blocks the water from draining properly.
How to Fix It
- Remove the drain cover and use a hair removal tool or bent wire to pull the clog out
- Follow with hot water and baking soda + vinegar solution to clear residue
- Install a mesh drain cover to catch hair before it enters the drain
- Clean the drain cover monthly to prevent buildup
08. Water Heater Problems
Getting no hot water — or water that’s either too hot or too cold — usually points to your water heater. The most common issues are a faulty thermostat, a broken heating element, or sediment buildup in the tank which reduces its efficiency.
How to Fix It
- Check the thermostat setting — it should be around 120°F (49°C)
- For electric heaters: the heating element may need replacing — a plumber can do this
- Flush the water heater tank once a year to remove sediment buildup
- If the tank is very old (10+ years) and having frequent issues, consider replacing it
- Always call a professional for gas water heater repairs
09. Frozen Pipes
In very cold weather, the water inside your pipes can freeze. When water freezes, it expands and can burst the pipe — causing a flood when it thaws. Pipes in unheated spaces (garages, basements, exterior walls) are most at risk.
How to Fix It
- If a pipe is frozen but not burst: apply a heating pad or warm towel to the pipe
- Use a hair dryer on low heat — never use an open flame
- Keep cabinet doors open in cold weather so warm air reaches pipes under sinks
- Let cold water drip from taps on very cold nights — moving water won’t freeze as easily
- Insulate pipes in cold areas with foam pipe insulation — cheap and very effective
- If a pipe has burst: shut off the main water valve immediately and call a plumber
10. Sewer System Backup
This is the most serious problem on the list. A sewer backup means your main sewer line is blocked. Signs include: multiple drains in the house clogging at once, gurgling sounds from toilets, sewage smell inside your home, or water backing up from floor drains.
Common causes include tree roots growing into the sewer line, buildup of grease and debris over many years, or a collapsed section of pipe.
How to Fix It
- Stop using all water in the home immediately to prevent overflow
- Do NOT try to fix this yourself — it requires professional equipment
- Call a licensed plumber who can use a sewer camera to find the blockage
- The plumber will use a high-pressure hydro-jet or mechanical snake to clear the line
- Prevent future backups: never pour grease down drains, avoid planting trees near sewer lines
To Summarize
Plumbing problems are part of homeownership — there’s no way around it. The good news is that most of the issues on this list are preventable with regular maintenance and quick action when you notice something is wrong.
Simple habits make a huge difference: never pour grease down the kitchen drain, use a drain cover in the shower, flush your water heater annually, and insulate your pipes before winter. These small steps can save you hundreds — or even thousands — of dollars in repairs.
For small fixes like a dripping faucet or a slow drain, a little DIY effort goes a long way. But for anything involving burst pipes, water heaters, or sewer backups — always call a licensed, professional plumber. Safety first. And when in doubt, it is always better to spend a little on a professional visit than to turn a small problem into a very expensive disaster.
Look after your pipes, and they’ll look after you.