Quick answer
Check your main water valve to ensure it's fully open. Inspect the pressure regulator for issues and flush the sediment trap. If the problem persists, contact a professional plumber.
Confirm the symptom
- Low water pressure from all faucets and fixtures
- Water pressure drops suddenly or gradually
- No improvement after checking individual fixtures
Tools and prep
- Adjustable wrench
- Pressure gauge
- Plumber's tape
- Garden hose
- Safety gloves and goggles
- Turn off main water supply before working on pipes
Step-by-step troubleshooting
- Check Main Water ValveDo: Locate and ensure the main water valve is fully open.Observe: Valve is fully open or partially closed.Means: A closed or partially closed valve restricts water flow.Next: If closed, open fully and check pressure.
- Test Water PressureDo: Attach a pressure gauge to an outdoor spigot or faucet.Observe: Normal pressure is 40–60 psi; below 30 psi is low.Means: Low pressure indicates a problem with the water supply or regulator.Next: If pressure is low, inspect the pressure regulator.
- Inspect Pressure RegulatorDo: Check the pressure regulator for leaks or damage.Observe: Regulator shows signs of wear or leaks.Means: A faulty regulator can cause low pressure.Next: Adjust or replace the regulator if needed.
- Flush Sediment TrapDo: Locate and flush the sediment trap near the water meter.Observe: Sediment or debris is present in the trap.Means: Clogged sediment traps reduce water flow.Next: Clean the trap and recheck pressure.
- Check for Pipe ClogsDo: Inspect visible pipes for blockages or corrosion.Observe: Signs of clogs or corrosion in pipes.Means: Clogged or corroded pipes restrict water flow.Next: Clean or replace affected pipes.
- Inspect Water MeterDo: Check the water meter for a stuck piston or diaphragm.Observe: Meter shows irregular movement or is damaged.Means: A faulty meter can impede water flow.Next: Contact a professional if the meter is faulty.
Common causes
| Cause | Likelihood | Difficulty | Part often needed |
|---|---|---|---|
| Closed Main Water Valve Restricts water flow to the entire house. | Common | Easy | None |
| Faulty Pressure Regulator Regulates incoming water pressure; failure leads to low pressure. | Common | Medium | Pressure Regulator |
| Clogged Sediment Trap Traps debris and sediment, which can accumulate over time. | Common | Easy | Sediment Trap Cleaning Kit |
| Corroded or Clogged Pipes Mineral buildup or corrosion narrows pipe diameter. | Sometimes | Hard | Pipe Replacement Kit |
| Stuck Water Meter Piston Internal components can become stuck, restricting flow. | Rare | Hard | Professional Inspection |
| Municipal Water Supply Issue Low pressure from the water company affects the entire system. | Sometimes | N/A | None |
Parts matching
Common parts needed for fixing low water pressure:
- Pressure Regulator
- Sediment Trap Cleaning Kit
- Pipe Replacement Kit
- Plumber's Tape
- Water Meter Valve
Purchase parts compatible with your home's plumbing system.
When to call a professional
- Low pressure persists after checking all possible causes
- You suspect a problem with the water meter or main line
- You're unsure about working on plumbing systems
- You hear unusual noises in the pipes or notice leaks
FAQ
Can low water pressure be caused by a problem with the water company?
Yes, if the municipal water supply has low pressure, it can affect your home. Check with neighbors to see if they're experiencing the same issue.
How often should I flush my sediment trap?
It's recommended to flush the sediment trap once a year to prevent buildup and maintain water pressure.
What is a pressure regulator and why is it important?
A pressure regulator controls the water pressure entering your home, preventing damage from high pressure and ensuring consistent flow.
Can I replace a pressure regulator myself?
Yes, if you have basic plumbing skills. Turn off the main water supply, follow manufacturer instructions, and test pressure after installation.
Why is my water pressure low only in certain fixtures?
Low pressure in specific fixtures usually indicates a local issue, such as a clogged aerator or valve, rather than a whole-house problem.