Low Water Pressure in Your House? Causes & Plumbing Solutions

If you’ve turned on your faucet expecting a steady stream of water—only to get a weak trickle instead—you’re not alone. Low water pressure is one of the most common plumbing problems homeowners experience.

While it may seem like a minor annoyance, low water pressure can signal a larger plumbing issue hiding behind your walls. Understanding the cause is the first step toward fixing it.

At Owyhee Heating, Air Conditioning & Plumbing, we help homeowners diagnose and resolve water pressure problems quickly and professionally. Here’s what could be causing yours.

1. Mineral Buildup in Pipes

Hard water can lead to mineral buildup inside your plumbing pipes. Over time, minerals like calcium and magnesium collect along the pipe walls.

This buildup:

• Narrows the inside diameter of your pipes

• Restricts water flow

• Reduces pressure at faucets and showerheads

Older homes with galvanized steel pipes are especially vulnerable. If mineral buildup is severe, pipe replacement may be necessary.

Solution: Professional pipe inspection and potential descaling or repiping.

2. Clogged Fixtures or Aerators

Sometimes the problem isn’t your plumbing system—it’s simply a clogged faucet aerator or showerhead.

Mineral deposits and debris can block small openings, reducing flow.

How to check:

• Is the low pressure limited to one faucet?

• Does the shower spray unevenly?

If so, removing and cleaning the aerator may solve the issue.

If multiple fixtures are affected, the issue likely runs deeper within the plumbing system.

3. Hidden Water Leaks

A hidden plumbing leak can significantly reduce water pressure throughout your home.

Signs you may have a leak:

• Sudden drop in pressure

• Higher-than-normal water bills

• Damp spots on walls or ceilings

• The sound of running water when nothing is turned on

Leaks not only reduce pressure but can cause serious water damage if left untreated.

Solution: Schedule professional leak detection to pinpoint and repair the issue quickly.

4. Faulty Pressure Regulator

Many homes have a pressure-reducing valve (PRV) that controls water pressure entering the home.

If this valve fails, you may experience:

• Sudden low pressure throughout the house

• Fluctuating water pressure

• Extremely high pressure in rare cases

Pressure regulators typically last 7–12 years. If yours is aging or malfunctioning, replacement may be necessary.

5. Partially Closed Shut-Off Valves

If your home’s main shut-off valve or water meter valve isn’t fully open, it can restrict water flow.

This sometimes happens after:

• Plumbing repairs

• Water heater installation

• Routine inspections

Checking that both valves are fully open can quickly resolve the issue.

6. Municipal Water Supply Issues

Sometimes the problem isn’t inside your home at all.

External water supply issues can temporarily affect pressure, including:

• Water main breaks

• Hydrant flushing

• Nearby construction

If neighbors are experiencing the same issue, the problem may be coming from the local water supply.

7. Aging or Corroded Pipes

If your home is older, corrosion inside aging pipes may be restricting water flow.

Corroded pipes can:

• Reduce pressure

• Cause discolored water

• Increase the risk of leaks

In many cases, repiping sections of your home may be the most cost-effective long-term solution.

Contact a licensed plumber if:

• Low pressure affects the entire house

• The problem appeared suddenly

• You suspect a leak

• Cleaning fixtures didn’t fix the issue

• Your home has older plumbing

Water pressure problems rarely fix themselves, and delaying repairs can lead to more expensive damage.

If you’re dealing with low water pressure, don’t ignore the warning signs. Identifying the root cause early can prevent larger plumbing repairs down the road.

Owyhee Heating, Air Conditioning & Plumbing provides professional plumbing inspections, leak detection, pressure regulator replacement, repiping solutions, water softener installation, and reliable plumbing repairs to restore proper water flow and comfort to your home.

Schedule service online now and get your water pressure back where it should be. Call Owyhee Heating, Air Conditioning & Plumbing today at 208-466-8401 to schedule your plumbing service.