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Why Is My Water Pressure Low in the Summer? Common Causes and Fixes For Plainfield, IL Homeowners

By July 11, 2025No Comments

If you’ve ever noticed a sudden drop in your water pressure during the warmer months, you’re not alone. Many homeowners in Plainfield, IL experience this frustrating issue when they least expect it. Whether it’s a weak shower flow or a slow-filling dishwasher, low water pressure can disrupt daily routines and leave you wondering what’s going on inside your plumbing system.

Understanding why water pressure changes — especially during times of increased demand — can help you identify the root cause and find an effective solution. In this article, we’ll explore the most common reasons for low water pressure during summer and what Plainfield homeowners can do to restore strong, consistent flow throughout their homes.

Understanding Water Pressure: Why It Matters

Water pressure is the force that pushes water through your pipes and fixtures. It’s measured in pounds per square inch (PSI). The ideal residential water pressure typically ranges from 40 to 60 PSI. When water pressure falls below this range, you might notice slow filling sinks, weak showers, or appliances that don’t function properly.

Maintaining proper water pressure is crucial not just for comfort, but also for the health of your plumbing system. Low pressure can indicate underlying issues that, if left untreated, may cause pipe damage or expensive repairs down the line.

Why Does Water Pressure Drop During Summer?

Summer brings an increase in water use for many households — from watering gardens and filling pools to running sprinklers and hosting barbecues. This surge in water demand, combined with other seasonal factors, can lead to lower water pressure in your home.

Let’s look at the most common causes of summer water pressure problems in Plainfield homes.

1. Increased Water Demand in the Neighborhood

During hot months, nearly every household in your area uses more water for outdoor activities. This increased demand puts pressure on the municipal water supply system. When the local water mains and pumping stations are handling more volume than usual, water pressure for individual homes can drop.

According to the American Water Works Association (AWWA), water consumption can rise by up to 50% during summer months compared to winter, especially in suburban and residential areas like Plainfield. This strain on the system may temporarily reduce water pressure, particularly during peak hours in the early morning and evening.

2. Partially Closed or Faulty Pressure Regulator Valve

Many homes have a pressure regulator valve (PRV) installed where the water line enters the house. This valve helps keep water pressure within safe limits to protect your plumbing. Sometimes, the PRV can get stuck, corroded, or incorrectly adjusted, leading to lower pressure.

Summer heat and increased water flow may aggravate these issues. A professional plumber can test and recalibrate or replace the valve if needed, restoring your water pressure to optimal levels.

3. Leaks in Your Plumbing System

Leaks are a common culprit for water pressure loss. During summer, soil movement caused by heat and dryness can shift underground pipes, causing cracks or breaks. Even small leaks inside your home can divert water away from fixtures, lowering pressure.

Signs of leaks include damp spots on walls or ceilings, unusually high water bills, or the sound of running water when everything is off. Catching leaks early with a professional inspection can save you money and prevent water damage.

4. Clogged or Corroded Pipes

Over time, mineral deposits, rust, and sediment can build up inside pipes, narrowing the flow path and reducing water pressure. Hard water, which is common in parts of Illinois, contributes to this buildup.

Summer months with high water usage can make the reduced flow more noticeable. Flushing your pipes or upgrading to corrosion-resistant materials like copper or PEX can improve your water pressure and water quality.

5. Issues With Your Water Heater

Sometimes low water pressure is not a problem with the main water line but with your hot water system. Sediment buildup in water heaters can clog the pipes and restrict hot water flow, causing reduced pressure in showers and faucets.

Regular maintenance of your water heater, including flushing the tank annually, helps maintain both pressure and efficiency.

6. Municipal Water Supply Problems

Occasionally, the issue lies beyond your home with the municipal water supply. Plainfield’s water department may perform maintenance, repairs, or flushing of water mains that temporarily reduce water pressure.

If you notice sudden widespread pressure drops during summer, contacting the local water authority can confirm if there is a known issue affecting your area.

How to Diagnose Low Water Pressure in Your Home

Before rushing to costly repairs, it’s helpful to understand where the problem might be. Here are some simple steps Plainfield homeowners can take to diagnose water pressure issues:

  • Check if the problem affects all fixtures: If low pressure is only in one faucet or shower, the issue may be localized, such as a clogged aerator or valve.

  • Test both hot and cold water: If only hot water pressure is low, suspect the water heater or related plumbing.

  • Observe pressure at different times: Pressure dropping only during peak use hours may indicate municipal supply issues.

  • Look for leaks or water damage: Visible signs around the home can help pinpoint leaks.

  • Use a pressure gauge: Attach a pressure gauge to an outdoor faucet or hose bib to measure your home’s water pressure. Readings below 40 PSI often mean pressure is too low.

Common Fixes for Low Water Pressure in Summer

Once you’ve identified possible causes, there are several practical fixes that can restore your water pressure and improve your overall plumbing performance.

1. Schedule a Professional Plumbing Inspection

A licensed plumber from Plainfield can perform a comprehensive inspection to detect leaks, test the pressure regulator valve, and evaluate pipe conditions. Early detection and repair of leaks or faulty components can prevent more serious damage.

2. Replace or Adjust the Pressure Regulator Valve

If the PRV is malfunctioning, a plumber can adjust it to the proper pressure or replace it with a modern, reliable valve to maintain consistent pressure year-round.

3. Clean or Replace Faucet Aerators and Showerheads

Mineral buildup in aerators and showerheads is a simple but often overlooked cause of low pressure. Removing and soaking these fixtures in vinegar or replacing them can improve water flow quickly.

4. Flush Your Water Heater Annually

To avoid sediment buildup inside the water heater, an annual flush is recommended. This maintenance step preserves hot water flow and efficiency.

5. Upgrade Old Pipes

If your home has aging galvanized steel or iron pipes, upgrading to copper or PEX piping can prevent corrosion-related pressure drops and improve water quality.

6. Use Water Pressure Boosters

In some cases, installing a water pressure booster pump or a home water pressure system can help increase and stabilize water pressure, especially in homes located at higher elevations or at the end of municipal lines.

7. Communicate With Your Local Water Department

Stay informed about any municipal maintenance or repairs that could affect your water supply. Local water authorities can sometimes offer solutions or notify you about expected pressure changes.

Preventive Tips to Maintain Strong Water Pressure

Avoiding low water pressure issues before they start is the best way to protect your plumbing system. Here are some proactive tips:

  • Have your plumbing system professionally inspected annually.

  • Regularly clean faucet aerators and showerheads.

  • Fix leaks immediately when discovered.

  • Schedule water heater maintenance every year.

  • Consider installing a water softener if you have hard water to reduce mineral buildup.

  • Monitor your water bills for unusual spikes indicating leaks or waste.

Why Trust Professionals Like Leto Plumbing & Heating?

While some small fixes are simple enough for homeowners to handle, many water pressure issues require specialized knowledge and tools. Attempting repairs without expertise can lead to costly mistakes or worsen problems.

At Leto Plumbing & Heating, our experienced technicians understand the unique plumbing challenges faced by Plainfield, IL homes. We use advanced diagnostic equipment to pinpoint issues quickly and provide lasting repairs. Our team is committed to delivering high-quality, reliable service with clear communication and honest pricing.

For Plumbing Services in Plainfield, IL, Contact Leto Plumbing & Heating Today

Low water pressure is a common but manageable issue that many Plainfield homeowners face, especially during periods of high water use. Whether caused by municipal supply constraints, plumbing system leaks, or aging equipment, understanding the reasons behind the problem is the first step toward a solution.

By taking proactive measures and working with trusted professionals, you can restore reliable water pressure and enjoy your home’s full comfort all year long.

If you’re experiencing low water pressure or any other plumbing concerns, don’t hesitate to reach out to the experts at Leto Plumbing & Heating. Our team offers thorough inspections, effective repairs, and maintenance services designed to keep your home’s plumbing in top condition.

With years of experience serving the Plainfield community, we pride ourselves on professional workmanship, clear communication, and customer satisfaction. Let us help you enjoy strong, consistent water pressure and peace of mind.

Call Leto Plumbing & Heating today to schedule your service or get a free estimate!

815-393-5505