Why Does My Water Pressure Drop in Winter? Common Causes and Fixes for Denver & Littleton Homes

You step into the shower on a freezing morning in late winter. Instead of a blast of deliciously hot water, the water trickles out. Your water pressure has declined for no obvious reason. Besides reducing the comfort and enjoyment of your shower, low water pressure can make filling a pot take forever. Unfortunately, low water pressure in winter in Denver is an especially common issue.

While it may be common, a sudden drop in water pressure isn’t a random occurrence. Instead, there are specific, diagnosable problems that cause this symptom. While some of the causes are relatively harmless, others need to be dealt with right away. By gaining a better understanding of the underlying issue, you can learn when you can manage the problem on your own and when you should call Elkhorn Heating, Air Conditioning, Plumbing & Electrical to get professional help.

Why Water Pressure Drops in Cold Weather: The Science

There are a few key reasons why you might notice your water pressure drops in winter in Littleton. If the pressure change is solely due to the changing seasons, you likely don’t need to worry about it. However, you can always schedule a plumbing inspection for your peace of mind.

Pipe Contraction

With the arrival of freezing temperatures, metal pipes contract. In some cases, plastic pipes can contract slightly as well. 

When this occurs, the inner diameter of the pipe shrinks. As it grows smaller, it reduces the amount of water that can flow through the pipe.

Increased Household Demand

During cold weather, water demand often increases. Households may use the dishwasher more often as they host family over the holidays or spend more time at home. Family members may also take longer showers or run more loads of laundry.

For all of these reasons, the water heater may struggle to keep pace with demand. While the same pressure is produced, it is being divided among multiple users. When this occurs, it may seem like there is less pressure than there actually is.

Changes to the Municipal Supply

Another one of the most common low water pressure causes is changes to your municipal supply. City water systems, like Denver Water, often experience higher demand and pressure fluctuations during extreme cold events, such as when everyone in the city is running water to keep their pipes from freezing. 

Partially Frozen Pipes

Finally, it’s also worth noting that pressure changes might mean that a potential danger is lurking in your walls. Even if your pipes haven’t frozen completely, they may have still begun the process of freezing. If enough ice has developed, it can constrict your pipe and lead to significantly reduced flow. 

This is an indication that your pipes may freeze completely in the future. If you notice low water pressure and other frozen pipe signs, it’s time to take action to prevent your pipes from bursting.

Quick Homeowner Checks You Can Perform

If you are experiencing winter plumbing problems in Denver, there are a few DIY steps you can try to solve the problem. 

• Test Multiple Fixtures: One way to determine the extent of the problem is by testing different fixtures. If the pressure is low in only one place, you’re likely dealing with a localized clog or a problem with a single valve. When pressure levels decline in your entire home, it reflects an issue with the water supply or main line.
• Check Your Water Meter and Shut-Off Valve: Sometimes, someone will accidentally bump or close the shut-off valve. If it is the cause, this is an easy problem to check and fix.
• Inspect Your Exposed Pipes for Frost: Frozen pipes can reduce the flow of water. Eventually, they can end up bursting and causing significant water damage in your home. While you can’t see every pipe, check the ones that are exposed in your basement, crawlspace, garage, and exterior walls. You may see visible ice or frost on the pipes if they are starting to freeze. Using your hand, you can also feel the side of the pipe for any unusually cold section.
• Check Your Water Heater: When testing different fixtures for water pressure, pay attention to how the cold and hot taps perform. If only the hot tap has low pressure, the real issue may be with your water heater. There may be sediment buildup, a partially closed inlet valve, or a faulty dip tube. 
• Talk to Your Neighbors: Sometimes, low water pressure is a community-wide issue. If your entire home is experiencing poor pressure, ask your neighbors if they noticed the same change. You can also check Denver Water or your local utility provider’s website for outages and other alerts.

Serious Causes That Require a Professional Plumber

While some pressure-related problems can be diagnosed and resolved on your own, other issues require professional plumbing repairs in Denver.

Partially or Fully Frozen Pipes

If you suspect frozen pipes, get help right away. A pipe freezing is an immediate emergency. Do not try to thaw them by pouring boiling water, using a torch, or operating a heat gun close to the pipe because these actions can result in cracked or burst pipes. 

Instead, call one of our licensed plumbers. We can safely thaw your pipes, inspect for damage, and recommend the best methods for preventing this type of problem from recurring in the future.

Hidden Leaks Caused by Freeze-Thaw Cycles 

In Colorado, we normally experience repeated freeze-thaw cycles throughout the year. Each time the pipes freeze and thaw, it can result in small cracks. These cracks allow water to leak behind your walls, underground, and underneath slabs. 

Because the leak is hidden, low water pressure is often one of the first signs that it exists. Additionally, you might notice a mold odor, an inexplicably high water bill, or unexplained wet spots.

Water Main Issues

Older homes in Littleton are more likely to have water main line issues. For example, Ken Caryl, Columbine, and Heritage have lines that were originally set up 30 to 50 years ago.

Over time, these main lines can develop problems. If they are corroded, cracked, or partially frozen, your household will experience a drop in water pressure. The best way to find out if this is the case and get your main line repaired is by reaching out to a professional plumber in Littleton, CO.

Sediment and Mineral Buildup

In our area, the water supply contains a range of different minerals. While your water is safe to drink, the added minerals can accumulate within pipes and water heater tanks. 

During the wintertime, hot water use tends to grow. Because of this, any sediment-related restrictions become especially noticeable. To avoid this issue, it’s important to flush your hot water tank every six months. 

Failing Pressure Regulator

While this isn’t true at every property, most Denver-area homes have a pressure-reducing valve (PRV). This valve is responsible for regulating the pressure that comes from upstream so that it is lower as it enters your home.

Over time, these valves can start to wear out. While the average age can vary, they mostly last around 10 to 15 years. Once they begin to fail, you’ll notice sudden pressure spikes or drops.

The Colorado-Specific Risk: Freeze-Thaw Pipe Damage

From dealing with the climate to avoiding water main issues in Denver, there are a few special considerations local residents have to watch out for. Because of our local experience, our plumbers have personal experience living and working with Denver’s water supply. Whether you need faucet repairs or assistance thawing your pipes, we can help.

Denver and Littleton’s Unique Climate Pattern

In some parts of the United States, everything remains frozen all winter. Along the Front Range, we typically cycle between freezing nights and mild days. This type of repeated expansion and contraction in our pipes creates more stress than a steady freeze, increasing the likelihood of burst pipes.

High-Risk Areas in the Home 

There are also certain building designs that make homeowners more likely to experience low water pressure in winter in Denver and Littleton. Many of the Littleton homes that were built between the 1970s and 1990s have pipes that run in areas prone to freezing. It wouldn’t be possible to build the same homes today because the designs wouldn’t meet our current insulation standards. Anytime pipes are run through uninsulated garages, crawlspaces, and near hose bibs, there is a higher likelihood that they will freeze.

The Danger of a Slow Leak vs. a Burst 

When you normally think about frozen pipes, you often imagine them bursting and a waterfall pouring out of the walls. In reality, many instances of frozen pipes involve a slow, undramatic leak. 

If a hairline crack starts to leak behind your drywall, it can be weeks before you detect it. During that time, it can start to cause mold and structural damage in your home. Depending on the extent of the leak, it can also lead to a higher water bill. In many cases, the only early symptom of a slow leak is a sudden drop in water pressure.

How Elkhorn Diagnoses Winter Water Pressure Problems

Whether you’re dealing with a burst pipe or low water pressure, an emergency plumber in Denver can help. Our team of plumbing experts can determine the source of your water pressure issue and find a fast, long-lasting solution.

Comprehensive Pressure Testing

First, we need to determine if we’re looking at localized problems or water main issues in Denver. To do that, we’ll test the PSI at multiple points in your system. This allows us to see if the pressure drop is occurring at the water heater, an individual fixture line, the main line, the PRV, or another location.

Pipe Inspection and Leak Detection 

If we believe that a hidden leak is the source of your pressure issues, we can use professional detection methods to locate the leak. We can perform this inspection without any unnecessary demolition, ensuring the least amount of disruption possible.

Water Heater Evaluation

Thanks to our hard water, it is common for water heaters to contribute to pressure issues. We can quickly determine whether we can solve the problem by flushing your tank, repairing the faulty component, or replacing your water heater.

Preventive Recommendations

While fixing the issue is our first goal, our team is here to provide you with long-term support and advice. To help avoid future problems, we will evaluate your pipe insulation and existing plumbing setup. We’ll also recommend the best PRV replacement schedule, so you don’t suddenly have a dip in your pressure down the road.

24/7 Emergency Plumbing Service

When you’re dealing with frozen or burst pipes, you can’t wait until 9 A.M. on Monday to call our office. We understand that plumbing disasters don’t keep bankers’ hours. Because of this, Elkhorn Heating, Air Conditioning, Plumbing & Electrical is committed to providing top-rated emergency plumbing services in Denver, Littleton, and the surrounding areas. Whether you’re dealing with a burst pipe at midnight or an overflowing toilet on Saturday morning, our team is just a phone call away.

Optimize Your Water Pressure

If you’re dealing with low water pressure in winter in Denver, it’s important to be proactive. Low water pressure isn’t a minor inconvenience when you take a shower. Often, it is an early warning sign that your home has frozen pipes, aging plumbing systems, or hidden leaks. Before one of these problems causes a major emergency, it’s important to call for help and get professional repairs carried out.

Worried about frozen pipes or hidden leaks? Schedule a winter plumbing inspection with Elkhorn Heating, Air Conditioning, Plumbing & Electrical and get ahead of costly damage.