Low Water Pressure in Your Home? Here’s What Could Be Causing It

Expecting a warm, refreshing shower only to get a little trickle from the showerhead is beyond frustrating. Low water pressure is an unpleasant reality of plumbing and has many possible causes. A simple pipe declogging may fix a minor pressure issue, but a problem with the municipal supply may affect your entire neighborhood and require a team of professionals.  

Learn what causes water pressure problems, how to fix the basic issues yourself, and when to call the experts.  

Is the Problem in One Fixture or the Whole House?  

An issue that only affects one showerhead and an issue that affects all your showers, plus your dishwasher and toilets, are caused by two very different problems. Determining the extent of the low water pressure is the best way to narrow down potential causes.  

Common Causes of Low Water Pressure at a Single Fixture  

Got a dishwasher that isn’t washing right? Struggling with low water pressure in the shower? These are the most common causes of low pressure in just one fixture.  

Clogged Aerators and Showerheads  

Aerators are a component of showerheads that mix air with the water, creating a more efficient, consistent spray. Aerators are not designed to be filters, but since they are shaped like screens, they usually catch mineral buildup and debris. Then, the showerhead itself is the final ‘screen’ that also catches buildup.  

Over time, these devices get clogged and can even corrode if not cleaned regularly. Luckily, cleaning both aerators and showerheads is simple and requires the same materials. 

• Remove the aerators/showerhead: You may need an adjustable wrench to loosen everything. 

• Do an initial wash off: If you see big debris, use a toothpick or water to remove it. 

• Soak in vinegar and water: Place the fixture in a large bowl and submerge it in a 1:1 mix of distilled white vinegar and water. Swirl the fixture to allow the solution to run through it. 

• Wait: Soak 6 to 8 hours for heavy clogs or overnight for a really thorough clean. 

• Rinse and scrub: Rinse thoroughly to flush out vinegar and loosen debris, then use a toothbrush to finish removing the grime. 

• Reinstall: Install according to the manufacturer's instructions and test the new pressure.  

Partially Closed or Faulty Shut-Off Valves  

Valves under sinks or behind toilets can cause localized pressure issues. If it’s stuck in a partially closed position, you can use a wrench to loosen it. Turn the water on and off to check the pressure.  

If the valve is corroded or broken, then you may need to call for expert pipe repair services. 

Damaged or Kinked Supply Lines  

It doesn’t happen often, but flexible supply hoses can kink or become damaged. This restricts the water flow and usually requires replacement. If the hose has just been compressed or moved slightly out of place, you can typically straighten it without any fanfare.  Call a professional to help with the replacement.  

Common Causes of Low Water Pressure Throughout the Home 

Whole home pressure issues signal a significant problem that may require a licensed plumber.  

Main Water Line or Hidden Plumbing Leaks  

The main water line is the primary water source for your entire home. An issue in the water line will affect all your faucets and, depending on where the leak is, can cause household damage. These are the signs you may need a water line repair or replacement: 

• House-wide low pressure 

• Discolored water 

• Random wet spots 

• High water bills 

• Mold growth 

• Cracks in the foundation  

Call a licensed plumber immediately to fix your water line. Waiting to call for plumbing leak repair services could result in thousands of dollars in water damage. 

Old, Corroded, or Undersized Pipes  

Different pipe materials have different lifespans.  

• Copper: 50-70 years 

• Brass: 80-100 years 

• Galvanized Steel: 80-100 years 

• Cast Iron: 80-100 years 

• PVC: 50-100 years 

Consider the material of your home’s pipes and when they were installed. Various factors can cause pipes to corrode or degrade more quickly. High usage, lack of maintenance, hard water, and improper installation can all damage your pipes, causing your low water pressure.   

Water Pressure Regulator Problems  

Pressure regulators are valves that keep your home’s water flow steady, but they can fail over time. If water pressure suddenly drops throughout the house and other causes are ruled out, the regulator may be the issue. A licensed plumber can test, adjust, or replace it as needed. 

Municipal Supply or Well System Issues  

Your home’s water is either sourced from the municipal supply or a well system. A problem with these supply lines may cause low household water pressure. The best way to check for a municipal supply or well system issue is to contact your local government or other households on your supply.  

DIY Checks You Can Try First  

Learning how to fix low water pressure yourself is easy with this comprehensive list.  

• Test multiple fixtures 

• Check aerators/showerheads 

• Confirm valves are fully open 

• Look for supply line kinks  

• Check drains for clogs 

When to Call Home Comfort Experts for Help  

Call a professional service like Home Comfort Experts if you notice:  

• Sudden, house-wide pressure drops 

• Unexplained wet spots 

• Discolored water 

• Smelly water 

• No obvious cause for low pressure  

Home Comfort Experts provide fast, professional diagnosis and repair in Indiana and Michigan.  

Don’t wait for low water pressure to get worse. Home Comfort Experts can quickly identify the cause and explain how to fix low water pressure the right way.  

Call (574) 319-7054 to schedule professional service and restore strong, consistent water flow throughout your home.