Most people think of the shower first when they hear “low water pressure,” but this common issue can affect any fixture in your home that uses water. Your washing machine takes longer to cycle, faucets lose flow, dishwashers don’t rinse well, and toilets fill slowly. But what causes low water pressure in a house?
In this blog, we’ll look at seven common reasons your water pressure is low and what you can do to fix it. If you’d rather just have it fixed without the hassle of troubleshooting and DIY repair, call the best Santa Cruz, CA, plumbers: Expert Plumbing & Water Heaters.
How To Use a Water Pressure Gauge
Before you start checking pipes or fixtures, it helps to know exactly how low your water pressure is. Attach a gauge to an outdoor spigot and turn the water on all the way. A normal reading falls between 45 and 80 PSI. If it’s under 40, you have a pressure problem. After making any changes, test it again to see if it improves.
Seven Causes of Low Water Pressure in Santa Cruz, CA
These are the most common causes of low water pressure we see in homes across Santa Cruz. If you need help getting your water pressure back to normal, call Expert Plumbing & Water Heaters at 831-480-6898.
Water Pressure Regulator
Water pressure regulators control how much water enters your home. When the internal parts wear out, the regulator restricts pressure across every fixture.
If the PSI is much lower than the regulator setting, it’s no longer working. The solution is to replace it with a new unit that restores proper flow.
Clogged Pipes
Clogged pipes slow down water pressure by narrowing the inside of the line. In Santa Cruz, hard water leaves behind mineral deposits that collect along the pipe walls. Over time, that buildup restricts flow to showers, sinks, and appliances.
The only way to fix it is to clear the blockage or replace the affected section of the pipe.
Partially Closed Valves
Partially closed valves are a very common cause of low water pressure in a house. Valves control how water enters and moves through your system. If the main shutoff valve or water meter valve isn’t fully open, pressure drops throughout every room.
Turn wheel-style valves counterclockwise until they stop. For lever-style valves, make sure the handle lines up straight with the pipe.
Corroded Plumbing
Corroded plumbing blocks water from flowing through your system. Galvanized steel pipes rust from the inside, creating rough, flaking surfaces that catch debris and slow flow. Corrosion can also weaken the pipe wall, leading to leaks.
The solution is to replace the old pipes with newer materials that allow for full water flow and won’t deteriorate in the same way.
Leaking Plumbing Fixtures
Leaking plumbing fixtures redirect water before it reaches your faucet or showerhead, which lowers pressure throughout the house. Pressure loss often shows up as weak flow in multiple rooms. Signs include damp drywall, the sound of running water, or an unexplained spike in your water bill.
To fix it, locate the damaged pipe or connection and repair or replace it to keep pressure where it belongs.
Municipal Water Supply Issues
Municipal water supply issues affect entire neighborhoods. When the city works on the lines, reduces pressure during peak demand, or deals with a main break, your incoming flow drops. If your neighbors have the same problem, it’s not your plumbing.
If city pressure remains low for an extended period, the best solution is to install a booster pump to maintain steady pressure inside your home.
Narrow or Undersized Branch Lines
Narrow or undersized branch lines limit how much water reaches each part of your home. These smaller pipes connect the main supply to showers, sinks, toilets, and appliances. When the diameter is too small, pressure drops anytime more than one fixture runs.
Upgrading to ¾-inch or 1-inch lines, depending on your layout and the number of fixtures, fixes the issue and allows full, consistent flow throughout the house.
Contact Expert Plumbing & Water Heaters To Restore Your Water Pressure
Low water pressure in a house may start with a slow sink or a weak shower, but it doesn’t take long for the real problems to emerge. Blocked valves, leaks, buildup, and undersized pipes waste water, raise your bills, and cause damage behind your walls.
If you’re not sure who to call, read our blog on choosing the right emergency plumber. To fix the problem now, call Expert Plumbing & Water Heaters at 831-480-6898.
