Low water pressure usually starts as a small annoyance — a weak shower, a slow-filling sink, or a faucet that no longer feels as strong as it used to. But for many homeowners in Orange, low water pressure can point to a larger plumbing issue hiding behind the walls or beneath the home.
Sometimes the fix is simple. Other times, low pressure is an early warning sign of pipe corrosion, leaks, or aging plumbing infrastructure. Here’s what homeowners in Orange should know about what causes low water pressure and when it’s time to call a plumber.
First: Is the Problem Affecting One Fixture or the Whole House?
This is the first question plumbers ask because it quickly helps narrow down the cause.
If low pressure is happening at only one faucet or shower, the issue is usually isolated to that fixture. Common causes include:
- A clogged faucet aerator
- Mineral buildup inside the showerhead
- A partially closed fixture valve
- An aging or failing faucet
In many cases, cleaning or replacing the fixture solves the problem.
If low water pressure affects the entire home, the issue is usually more serious and may involve:
- The home’s pressure regulator
- The main shutoff valve
- Pipe corrosion
- A hidden plumbing leak
- Municipal water supply issues
Pressure Regulator Problems
Many homes in Orange have a pressure reducing valve (PRV) installed where the main water line enters the property.
This valve controls incoming water pressure and helps keep it at a safe level for the plumbing system. When the regulator begins to fail, homeowners often notice:
- Weak pressure throughout the home
- Inconsistent water flow
- Pressure changes between fixtures
Fortunately, replacing a faulty pressure regulator is often a straightforward repair.
Main Shutoff Valve Not Fully Open
Sometimes low water pressure starts after plumbing work or renovations.
If the home’s main water shutoff valve was recently adjusted and not reopened completely, it can significantly restrict water flow throughout the house.
Even a slightly closed valve can noticeably reduce pressure at sinks, showers, and appliances.
Aging Pipes and Mineral Buildup
Older homes in Orange may still have galvanized steel pipes, which are known to corrode internally over time.
As rust and mineral buildup collect inside the pipes, the opening for water flow becomes smaller and smaller. Because this happens gradually, many homeowners do not notice the problem until water pressure becomes significantly weaker.
Signs of pipe corrosion may include:
- Consistently low pressure
- Discolored water
- Uneven water flow
- Frequent plumbing leaks
In some cases, repiping the home with newer materials like copper or PEX becomes the best long-term solution.
Slab Leaks Can Reduce Water Pressure
Homes built on concrete slab foundations can develop hidden pipe leaks underneath the home.
These slab leaks often divert water before it reaches fixtures, causing pressure loss throughout the house.
Additional signs of a slab leak may include:
- Warm spots on flooring
- Unexplained increases in water bills
- The sound of running water when nothing is on
- Damp flooring or moisture issues
Because slab leaks can cause serious structural damage over time, early detection is important.
Could It Be the City Water Supply?
Occasionally, low pressure is caused by temporary issues with the municipal water supply.
Construction work, nearby repairs, or periods of high demand can sometimes affect pressure in certain neighborhoods of Orange. If neighbors are experiencing the same issue, the problem may be outside the home and should resolve once city work is completed.
How to Check Your Home’s Water Pressure
Homeowners can test water pressure using a simple pressure gauge attached to an outdoor hose bib.
Normal residential water pressure typically falls between:
- 45–80 PSI
Anything consistently below 40 PSI is generally considered low and may require professional inspection.
Don’t Ignore Ongoing Low Water Pressure
Low water pressure is often a symptom of a larger plumbing issue rather than the actual problem itself. Catching the cause early can help homeowners avoid expensive repairs, hidden leaks, and long-term pipe damage.
Service Lion provides plumbing inspections and low water pressure diagnostics for homeowners in Orange. Whether the issue is caused by aging pipes, leaks, pressure regulators, or fixture problems, our plumbers can identify the cause and recommend the right solution.