Few things are more frustrating than turning on the shower and getting a weak trickle instead of a steady stream. Low water pressure can make everyday tasks take longer and may signal that something is not quite right in your home. In Northern Virginia, this is a common complaint we hear from homeowners, especially in older neighborhoods and rapidly growing communities where plumbing systems are under constant demand.
At McDaniel Service, Inc., our technicians often come across low water pressure, most instances with a clear cause once you know where to look. Some issues are simple fixes, while others point to bigger plumbing concerns that should not be ignored. With decades of experience and a team of highly qualified, licensed, and insured technicians, we can help you determine the cause of your low water pressure and offer reliable solutions.
Mineral Buildup from Hard Water
Hard water is widespread in Northern Virginia, and over time it takes a toll on plumbing systems. Calcium and magnesium minerals slowly build up inside pipes, faucets, and fixtures, narrowing the path water flows through. This buildup can lead to reduced water pressure throughout the home, uneven flow at faucets and showerheads, and increased strain on plumbing components.
In many cases, homeowners notice pressure dropping gradually rather than all at once. By the time it becomes obvious, the buildup has often been forming for years.
Clogged or Dirty Fixtures
Sometimes low water pressure is not a whole-house issue. It is limited to one sink, shower, or appliance. This often points to a clogged aerator or showerhead.
Small openings in fixtures are especially prone to mineral deposits and debris. These clogs restrict water flow even when the rest of the plumbing system is working properly.
Cleaning or replacing affected fixtures can restore pressure quickly. If multiple fixtures show the same issue, there may be a larger plumbing issue at play.
Aging or Corroded Pipes
Many homes across Northern Virginia were built decades ago and still rely on older plumbing materials. Galvanized steel pipes, in particular, are known for corrosion and internal rust buildup.
As pipes age, it’s common for their internal diameter to shrink due to corrosion. Water flow often becomes restricted, and pressure starts to drop at multiple fixtures. This type of pressure loss usually worsens over time and can eventually lead to leaks or pipe failure. In older homes, pipe replacement or re-piping may be the most effective long-term solution.
Hidden Plumbing Leaks
A hidden leak can quietly reduce water pressure while also wasting water and increasing utility bills. Leaks often occur behind walls, under floors, or underground, making them difficult to detect without professional equipment.
Signs of a possible hidden leak include:
- Sudden or unexplained drop in water pressure
- Damp spots or discoloration on walls or ceilings
- Sound of running water when fixtures are off
- Unexpected spikes in water bills
Addressing leaks quickly helps prevent structural damage and restores proper water flow.
Pressure Regulator Problems
Most homes are equipped with a pressure reducing valve, also known as a PRV. This device controls the amount of pressure entering your home from the municipal supply.
When a pressure regulator begins to fail, it can restrict water flow and cause noticeable pressure drops throughout the house. In some cases, pressure may fluctuate, working fine one day and poorly the next.
PRV’s wear out over time and may need adjustment or replacement to maintain consistent water pressure.
Municipal Water Supply Issues
Not all water pressure problems start inside your home. In Northern Virginia, population growth and infrastructure upgrades can temporarily affect municipal water pressure.
Common external causes include water main repairs or replacements, high demand during peak usage times, and nearby construction impacting water lines. If your neighbors are experiencing similar pressure issues, the cause may be outside your control. Local water utilities can often provide updates on ongoing work in your area.
Partially Closed Valves
Low water pressure can sometimes be traced back to a simple oversight. Shutoff valves that are not fully open can restrict water flow. There are several areas you want to check, including the main shutoff valve inside the home, the water meter valve, and the individual fixture supply valves.
These valves may be partially closed after repairs or maintenance. Ensuring they are fully open can resolve pressure issues without further intervention.
Problems with Water Heaters
If low water pressure only affects hot water, the issue is often related to the water heater. Sediment buildup inside the tank or heat exchanger can restrict hot water flow. This is especially common in Northern Virginia homes with hard water. Over time, minerals collect inside the water heater and reduce performance.
Flushing the system or servicing internal components can improve hot water pressure and extend the life of the unit.
Undersized or Poorly Designed Plumbing
In some cases, low water pressure is not caused by damage or buildup but by the original plumbing design. Homes that have been renovated or expanded may have added bathrooms or fixtures without upgrading the plumbing system.
Undersized pipes or poor layout can limit water flow, especially when multiple fixtures are in use at the same time. This is often noticeable during morning or evening peak usage. A professional evaluation can determine whether upgrades are needed to support your household’s water demands.
When to Call a Professional
While cleaning fixtures or checking valves can be handled by homeowners, many causes of low water pressure require professional diagnosis. Persistent or widespread pressure issues should never be ignored.
A licensed technician can measure water pressure accurately, inspect pipes for buildup or corrosion, and identify leaks using specialized tools. Technicians can also evaluate regulators and valves and recommend long-term solutions. Remember, early intervention often prevents more costly repairs down the road.
Restore Comfort and Water Flow in Your Home
Low water pressure affects more than convenience. It can signal underlying plumbing issues that impact efficiency, safety, and long-term reliability. In Northern Virginia homes, hard water, aging pipes, and growing infrastructure demands all play a role.
If you are dealing with low water pressure, contact our team at McDaniel Service. We will pinpoint the cause, explain your options clearly, and help restore strong, consistent water flow throughout your home.
