7 Most Common Plumbing Problems

June 1, 2023

plumber with tool box working under kitchen sink

*Updated February 10th, 2025

Plumbing problems are one of those household headaches that always seem to happen at the worst possible time. Whether it’s a clogged drain slowing down your morning routine, a leaky pipe driving up your water bill, or a running toilet that just won’t stop, these issues can be frustrating—and costly—if left unchecked.

The good news? Most common plumbing problems have simple solutions when caught early. Everyday wear and tear, aging pipes, and minor clogs can escalate into bigger (and more expensive) repairs if ignored. Knowing what to watch for can help you address small issues before they turn into major headaches.

In this guide, we’ll walk through seven of the most common plumbing problems homeowners face, why they happen, and what you can do to fix them—whether it’s a quick DIY solution or a sign you need to call in a professional.

Common Plumbing Problems and How to Fix Them

Plumbing problems can range from minor annoyances to major headaches, and they always seem to happen at the worst possible time. While some issues are easy DIY fixes, others may require professional help to prevent costly damage. The key is to catch these problems early before they escalate. Below are seven of the most common plumbing issues homeowners face, along with tips on how to identify and fix them before they turn into bigger problems.

1. Running Toilet

A toilet that won’t stop running isn’t just annoying—it can waste hundreds of gallons of water a day and drive up your utility bill. The most common cause? A worn-out or ill-fitting flapper valve, which prevents the tank from sealing properly. Other potential culprits include an imbalanced float, a loose fill tube, or even a hidden leak inside the tank.

The good news? Many of these issues are quick DIY fixes. Replacing a flapper or adjusting the float is usually inexpensive and takes just a few minutes. If you suspect a hidden leak, try the food coloring test—add a few drops of food dye to the tank and wait 15–30 minutes. If the water in the bowl changes color without flushing, you’ve got a leak that needs fixing. Catching and repairing the issue early can save water and money.

2. Leaky Pipes and Faucets

That constant drip, drip, drip might seem harmless, but over time, it can waste thousands of gallons of water and drive up your water bill. In fact, a single faucet leaking one drop per second can add up to over 3,000 gallons a year—that’s the same as 180 extra showers!

Beyond wasting water, leaks can cause mold, mildew, and even water damage if left unchecked. The most common culprits? Worn-out washers, loose connections, or aging pipes. In many cases, fixing a leak is as simple as tightening a fitting or replacing a small part. If you notice water stains, damp cabinets, or an unexpected spike in your water bill, it’s worth taking a closer look. Catching leaks early can prevent bigger plumbing issues.

3. Low Water Pressure

There’s nothing worse than stepping into the shower expecting a refreshing stream—only to be met with a weak trickle. Low water pressure is a frustrating but common issue, and it can be caused by a variety of factors, from buildup in your pipes to problems with the municipal water supply.

Before jumping to conclusions, try eliminating competing water use—if someone’s running the dishwasher, watering the lawn, and doing laundry at the same time, your water pressure is bound to take a hit. If the problem persists, check for clogged aerators on your faucets or sediment buildup in your showerhead—both of which are easy fixes. In some cases, a leaky pipe, faulty pressure regulator, or aging plumbing system might be to blame, requiring professional attention. Identifying the cause is half the battle—once you know what’s behind the weak flow, you can take steps to fix it and get your water pressure back to normal!

4. Clogs

Clogged drains are one of the most common plumbing headaches, and they can happen anywhere—toilets, sinks, showers, and even main sewer lines. A simple clog caused by hair, soap scum, or grease might clear up with a plunger or drain cleaner, but tougher blockages often need professional tools like a drain snake or hydro-jetting. Some clogs are even hidden deep in the pipes behind walls or floors, making them much harder to fix without expert help. If you’ve tried all the usual tricks and your drain is still sluggish, it might be time to call in a plumber before things get worse!

5. Water Heater Issues

No hot water? That’s an instant plumbing emergency! Water heaters can fail for a number of reasons, including broken heating elements, sediment buildup, or even faulty installation. If your water isn’t heating properly, takes too long, or has a rusty tint, your heater might need maintenance—or replacement. The good news? Routine flushing and inspections can help prevent most issues before they become serious. Keeping an eye on your water heater’s performance can save you from an unexpected (and very cold) surprise!

6. Expensive Water Bill

Noticed a sudden jump in your water bill? You might have a hidden leak, a running toilet, or an inefficient appliance draining more water than you realize. Even a slow drip—just one drop per second—can add up to nearly 6 gallons a day! That’s wasted water and wasted money. Checking for leaks, fixing running toilets, and upgrading to water-efficient fixtures can help keep your bill in check and your plumbing system running efficiently.

7. Stained or Damaged Walls

Ever spotted a mysterious water stain, bubbling paint, or warped drywall? That’s usually a red flag for a hidden leaky pipe. If these stains appear on the ceiling, especially under a bathroom, there’s a good chance water is seeping from pipes behind the walls. Over time, this can lead to mold, mildew, and structural damage, making it a problem you don’t want to ignore. If you notice these signs, it’s best to investigate quickly—fixing a minor leak now can prevent a much bigger (and more expensive) repair later!

Final Thoughts

Plumbing problems are never fun, but knowing what to watch for can save you time, money, and a whole lot of frustration. From running toilets and clogged drains to leaky pipes and low water pressure, most common issues have simple fixes if caught early. A little maintenance and quick action can prevent small problems from turning into major headaches. Whether you’re a DIY pro or prefer to call in the experts, staying on top of these plumbing troubles will keep your home running smoothly.

Additional Plumbing Resources