Top 7 Plumbing Problems in Twin Falls (and How to Prevent Costly Repairs)

Keep Your Home Safe from the Most Common Plumbing Problems in Twin Falls

Plumbing problems in Twin Falls always seem to hit at the worst possible time—usually when you least expect it. Whether it’s a surprise leak during the holidays or frozen pipes after the first hard freeze, homeowners in the Magic Valley know just how unpredictable Idaho plumbing issues can be.

Several local factors make these challenges even more common: hard water, freezing winter temperatures, and older plumbing systems in many homes. Combined, these conditions increase the risk of costly damage if small issues go unchecked.

We’ve spent years helping families in Twin Falls and across the region fix plumbing problems before they get worse. In this guide, we’re breaking down the top 7 plumbing issues we see every year—and how you can prevent them.

Let’s dive in—and help you avoid unexpected plumbing headaches this year.

Leaky Pipes in Twin Falls Homes

Leaky pipes are one of the most common—and sneakiest—plumbing issues Twin Falls homeowners face. They often start small, but if left unnoticed, they can cause serious damage to walls, floors, and even foundations.

In Idaho, freezing winter temperatures can cause pipes to expand and contract, weakening joints and increasing the risk of slow leaks or bursts. Older homes in the area may also have aging plumbing systems where corrosion or worn seals are more likely. And when water pressure spikes—especially after city water line work—it can strain already vulnerable pipes.

Signs of a potential leak include:

• Unexpected spikes in your water bill

• Damp spots on drywall or ceilings

• Musty smells near cabinets or basements

• The sound of running water when all fixtures are off

Many leaks hide behind walls or under floors, making them hard to spot until the damage is done. That’s why early detection matters. If something feels off, it’s worth investigating before it turns into a major repair.

Clogged Drains & Recurring Backups

Clogged drains are a year-round frustration for many homeowners in Twin Falls. Whether it's a slow-draining sink or a backed-up shower, these issues can build up over time and often strike when you're least prepared—like during the holidays when guests are over or after the spring thaw when ground movement increases root intrusion.

In this part of Idaho, common culprits include:

• Hair and soap buildup in bathroom drains

• Grease and food particles down kitchen sinks

• Tree roots invading underground pipes, especially in older homes

• Hard water minerals contributing to buildup inside pipes

If you’re dealing with frequent slow drains, it may be more than just surface-level gunk. Seasonal shifts in moisture and temperature can also affect the soil around your pipes, making root growth more aggressive and drainage less predictable.

To help prevent clogs:

• Use mesh screens in sinks and showers

• Avoid pouring cooking grease or coffee grounds down the drain

• Run hot water after each use to help clear residue

• Consider monthly maintenance with baking soda and vinegar

For homes where backups happen often, a professional inspection might be needed to check for deeper blockages or damaged lines—especially if you’re seeing issues in multiple drains at once.

Low Water Pressure Issues in Twin Falls Houses

Low water pressure in the house can make simple tasks—like washing dishes, taking a shower, or running the laundry—feel frustratingly slow. For many Twin Falls homeowners, it’s more than just an inconvenience; it’s often a sign that something isn’t quite right with the plumbing system.

There are a few common causes:

• Sediment buildup in pipes from mineral-heavy Idaho water

• Aging or corroded plumbing in older homes

• Partially closed shutoff valves or pressure regulators

• Municipal supply issues after road work or nearby construction

Take this hypothetical example: A family in Twin Falls notices that their shower barely has enough pressure to rinse out shampoo. The kitchen sink works fine, but the washing machine takes forever to fill. It turns out that the older galvanized pipes running to the second floor had built up internal rust and sediment over the years—just enough to restrict flow.

While sometimes the fix is as simple as cleaning out a faucet aerator, ongoing low pressure can point to deeper issues in the home’s plumbing layout. It’s worth having it checked—especially if you notice the problem in more than one area of the house.

Frozen Pipes in Cold Idaho Winters

Frozen pipes are one of the most urgent plumbing concerns during Idaho’s harsh winter months—especially between December and February, when temperatures regularly dip below freezing. In Twin Falls, even well-insulated homes can be at risk if certain areas of the plumbing system are exposed to the cold.

Pipes located in unheated spaces—like garages, crawl spaces, and exterior walls—are the most vulnerable. When water freezes inside the pipe, it expands, putting pressure on joints and potentially causing cracks or full bursts. The damage often goes unnoticed until things thaw and water begins leaking or flooding.

To help prevent frozen pipes in Idaho, homeowners can:

• Insulate exposed pipes in basements, attics, and exterior walls

• Let faucets drip slowly during freezing nights to keep water moving

• Open cabinet doors under sinks to let warm air circulate around pipes

• Use heating tape on pipes that are especially hard to reach or insulate

If a pipe does freeze, avoid using open flames to thaw it—this can cause even more damage. Instead, use a hairdryer or heating pad, or contact a professional if the pipe is already showing signs of cracking.

Frozen pipe prevention is one of the smartest ways to avoid expensive mid-winter plumbing disasters—especially in homes that aren’t regularly monitored during colder months.

Sewer Line Problems That Can’t Wait

Few plumbing problems are as urgent—or as unpleasant—as sewer line issues. In Twin Falls, many older homes still rely on clay or metal sewer pipes that have been in the ground for decades. Over time, these materials can crack, shift, or even collapse under the pressure of shifting soil and tree root intrusion.

Some of the most common warning signs include:

• Slow drains throughout the house (not just one fixture)

• Gurgling sounds coming from toilets or tubs

• Foul smells inside or around the yard

• Unexplained wet patches or sunken spots on the lawn

The heavy soil in many parts of southern Idaho can also put extra pressure on aging sewer lines, especially after snowmelt or heavy rainfall. And if there are trees nearby—especially older ones—roots naturally seek out moisture and can grow directly into tiny cracks in the pipe.

Because sewer problems happen underground, they’re often hard to spot until a serious backup occurs. One of the most effective ways to diagnose the issue is through a video pipe inspection, which can reveal blockages, cracks, or misaligned sections without having to dig up the entire yard.

In some cases, repairs are enough. In others, full or partial sewer line replacement might be needed—especially if the pipe material is outdated or extensively damaged. Either way, early detection can save a lot of time, money, and stress.

Tankless Water Heater Troubles

Tankless water heaters are a popular choice for many Twin Falls homeowners thanks to their energy efficiency and on-demand hot water. But like any plumbing appliance, they come with their own set of challenges—especially in areas with hard water like southern Idaho.

Some common tankless water heater issues include:

• Cold water sandwich effect: bursts of cold water between hot ones, especially during back-to-back use

• Mineral and scale buildup: caused by hard water, which reduces efficiency and flow

• Sensor or ignition failures: often due to sediment or poor maintenance

Idaho’s water tends to have high mineral content, and without proper filtration or regular cleaning, that buildup can form inside the heat exchanger. Over time, this not only affects performance but can also shorten the lifespan of the unit.

One way to prevent these problems is through regular descaling, typically recommended once a year in hard water regions. This process flushes out mineral deposits and helps the system run more smoothly.

If you’re noticing fluctuating water temperatures, longer wait times for hot water, or error codes on your unit, it might be time for a maintenance check. Staying ahead of these issues can help extend the life of your investment and keep your hot water running consistently—especially during Twin Falls’ coldest months.

General Wear-and-Tear from Common Plumbing Issues in Idaho

Not all plumbing problems show up as emergencies. Many develop slowly over time, creating small annoyances that often get ignored—until they lead to bigger repairs. These everyday issues are among the most common plumbing problems in Idaho homes, especially in areas with older infrastructure or hard water.

Some typical signs of wear-and-tear include:

• Dripping faucets that waste water and raise utility bills

• Noisy pipes or water hammer when turning taps off

• Running toilets that seem to never stop

• Loose fixtures or slow leaks under sinks

What makes these minor problems more serious in Idaho is the high mineral content in the water. Over time, buildup from calcium and magnesium can clog aerators, reduce flow, and corrode internal components—even in newer fixtures.

While it’s easy to push these off as “just annoying,” small plumbing issues often cost more in the long run if left untreated. That’s why many homeowners schedule a yearly plumbing checkup to catch signs of aging pipes, sediment buildup, or slow leaks before they become major headaches.

It’s a simple step that can help extend the life of your plumbing system—and save you from unexpected repair bills later on.

When to Call TRW Plumbing (Twin Falls’ Trusted Plumbing Experts)

We’ve seen all these plumbing problems in Twin Falls firsthand—leaks that start small and spread fast, sewer lines invaded by tree roots, pipes that freeze and burst during Idaho’s cold snaps. These challenges are common in our community, and we know how stressful they can be when they happen in your own home.

Whether it’s a slow drain, water pressure that’s not what it used to be, or a tankless water heater that just won’t cooperate, TRW Plumbing has the experience and local knowledge to help you find the right fix—quickly and affordably.

“They were fast, professional, and explained everything in a way I could actually understand. I’d recommend TRW Plumbing to anyone in the Twin Falls area.”
— Amanda T., Twin Falls homeowner

Need help now—or want to prevent problems before they start?

Call or Text us at (208)423-3276
Or schedule a service online

No pressure. Just straightforward plumbing help from your local pros.

Frequently Asked Questions (FAQ)

1. What are the most common plumbing problems in Twin Falls homes?

Some of the most common plumbing issues in Twin Falls include leaky pipes, clogged drains, low water pressure, and frozen pipes during winter. Sewer line backups and tankless water heater issues are also common, especially in older homes or homes with hard water. These problems are often made worse by Idaho’s mineral-rich water and fluctuating seasonal temperatures.

2. How do I know if I have a hidden leak in my Twin Falls house?

Watch for signs like unexplained increases in your water bill, musty smells, damp spots on walls or ceilings, and the sound of running water when all fixtures are off. Leaks behind walls or under floors are especially common in older homes in the area. If you notice any of these signs, it’s best to have a professional inspection done as soon as possible.

3. What causes low water pressure in Idaho homes?

Common causes include mineral buildup from hard water, corroded or aging pipes, partially closed shutoff valves, and occasionally municipal water supply issues. Homes with galvanized steel pipes are more prone to corrosion and reduced flow over time.

4. Can freezing pipes really burst in Twin Falls winters?

Yes. Between December and February, temperatures in Twin Falls often fall below freezing. Pipes exposed to the cold—especially in crawl spaces, basements, or exterior walls—can freeze, expand, and burst. This can cause major flooding and costly repairs, which is why insulation and other preventive steps are essential.

5. How often should I get my drains cleaned by a professional?

For most homes, professional drain cleaning is recommended once every 1–2 years. However, if you notice recurring clogs or slow drains, it may be worth doing it more often. Regular maintenance helps prevent bigger issues like blockages or sewer backups.

6. Is it better to repair or replace a tankless water heater?

It depends on the issue and the age of the unit. If your tankless water heater is less than 10 years old and the problem is minor (like a sensor or descaling), a repair might be enough. However, if it’s older, inefficient, or having repeated issues, replacement may save more money long-term—especially in areas with hard water like Idaho.

7. How do I prevent clogged drains in the kitchen and bathroom?

Use sink strainers to catch food and hair, avoid pouring grease or oil down the drain, and flush your drains with hot water regularly. A monthly rinse with baking soda and vinegar can help reduce buildup. These simple habits go a long way toward preventing blockages.

8. What’s the average cost to fix a sewer line problem in Twin Falls?

Costs vary depending on the issue. Minor repairs (like clearing a blockage) can range from $150 to $400, while major repairs or replacements can range from $2,500 to $7,500 or more. Factors include pipe material, depth, and whether trenchless repair methods are possible.

9. Does hard water in Idaho affect my plumbing?

Yes. Hard water—common in Twin Falls and most of southern Idaho—leaves behind mineral deposits that can clog pipes, damage fixtures, and reduce water heater efficiency. Over time, this buildup can lead to leaks and reduced water flow. Installing a water softener and doing regular maintenance can help.

10. When should I call a plumber for small issues like dripping faucets?

If a faucet drips constantly, it’s worth calling a plumber sooner rather than later. Even slow drips can waste hundreds of gallons per year, increase your water bill, and cause wear on your plumbing. Small issues often get worse over time—and are much cheaper to fix early on.