7 Most Common Causes of Low Water Pressure & How to Fix Them

Having the perfect water pressure in your home is essential to enjoying the comfort and functionality your plumbing system offers. From taking a refreshing shower to cleaning your dishes effectively, water pressure plays a crucial role in almost every daily activity. However, many homeowners face the challenge of low water pressure, which can disrupt the flow of everyday life. Fortunately, most water pressure issues can be easily diagnosed and resolved with professional guidance.

In this blog post, we will discuss the seven common causes of low water pressure and their corresponding solutions. By understanding these issues and implementing the recommended fixes, you can enjoy your home’s plumbing system to its fullest potential. Advanced Gen Plumbing has been providing high-quality plumbing solutions since 2014, and we’re here to help you every step of the way with top-rated plumbers in Ontario, CA, and beyond!

Clogged Pipes and Fixtures

One of the primary reasons for low water pressure in a home is clogged pipes and fixtures. Sediments, debris, and mineral deposits accumulate over time and gradually restrict water flow, leading to decreased pressure. To resolve this issue, you should regularly clean aerators and showerheads, removing any built-up grime. For severely clogged pipes, you may need professional assistance to clear the blockage and restore normal water flow.

Corroded Plumbing

Another common culprit of low water pressure is corrosion, which often occurs with galvanized iron pipes. Over time, the inner lining of these pipes deteriorates, and the resulting corrosion restricts water flow. If you have an older home or notice rusty-colored water, it’s wise to have your plumbing system inspected by a professional to determine if corroded pipes are the source of your low water pressure. Replacement with modern PVC or copper pipes can alleviate the problem and prevent future issues.

Faulty Pressure Regulator

The pressure regulator is a device that maintains constant water pressure throughout your home. If you experience sudden changes in water pressure, a faulty pressure regulator may be to blame. In this case, you’ll need to have a professional plumber inspect the regulator, as repairs or replacements may be necessary to restore proper water pressure.

Broken or Leaky Pipes

If you notice inconsistent or weak water pressure in specific areas of your home, broken or leaky pipes may be the cause. Water leaks can decrease pressure and result in wasted water, leading to higher utility bills. To determine if you have a leak, turn off all water fixtures in your home and check your water meter. If it continues to spin, you most likely have a leak. A professional plumber can locate the source of the leak and fix or replace the damaged pipe.

Inadequate Supply Line Size

An undersized water supply line can create problems as it may not provide sufficient water flow to meet your home’s demand. If you’ve recently added or upgraded plumbing fixtures, such as installing a new showerhead, and noticed a reduction in water pressure, it could be due to an inadequate supply line size. A professional plumber can assess your home’s water supply line and determine if an upgrade is necessary.

Municipal Water Supply Issues

Low water pressure can sometimes be traced back to issues with your local water supply. Municipal water companies may perform maintenance or repairs on water lines, temporarily reducing water pressure. If you suspect this may be the cause of your low water pressure, contact your local water company for information on possible disruptions in the area. Should the problem persist, consult a professional plumbing service for further assistance.

Peak Period Usage

Your home’s water pressure may also be affected during periods of high usage, such as early mornings and evenings when neighbors use water simultaneously. If low water pressure is only a temporary issue during these peak periods, it could be a result of high demand in your community. While there may not be a quick fix for peak-period usage issues, efficient water schedules, and staggered usage can help alleviate the problem.


Low water pressure can be a frustrating issue that affects the comfort and functionality of your home. By understanding the most common causes of low water pressure and taking appropriate steps to fix them, you’ll be able to solve the problem and ensure a smooth-running, efficient plumbing system. Advanced Gen Plumbing is here to provide top-rated assistance for all your plumbing needs. As providers of high-quality plumbing solutions since 2014, our skilled plumbers in Ontario, CA, and beyond are dedicated to helping you achieve optimal water pressure and flow throughout your home. Contact us today to schedule a consultation, and let us resolve your low-water pressure woes!

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