Why Is My Water Pressure So Low? Quick Fixes & When to Call a Plumber

Low water pressure can be frustrating, whether you’re trying to take a shower, wash dishes, or water your lawn. If your faucets are trickling instead of flowing, there could be several reasons behind the issue. Here’s a breakdown of common causes, troubleshooting steps, and when to call a plumber.
Common Causes of Low Water Pressure
1. Leaks in Your Plumbing System
If water is escaping from a pipe before reaching your fixtures, it can reduce pressure throughout your home. Look for signs of leaks, such as damp spots on walls, ceilings, or floors, and an unexpectedly high water bill.
2. Sediment or Mineral Buildup in Pipes
Over time, minerals from hard water can accumulate in pipes, restricting water flow. This is especially common in older plumbing systems or homes with high mineral content in the water supply.
3. Municipal Water Supply Issues
Sometimes, the problem isn’t inside your home. A drop in pressure can be due to maintenance work, a water main break, or high demand in your area. Contact your local water provider to check if they’re experiencing issues.
4. Partially Closed Valves
A partially closed main shut-off valve or water meter valve can restrict flow. If you’ve recently had plumbing work done, someone may have accidentally left a valve in the wrong position.
5. Failing Pressure Regulator
If your home has a pressure regulator and it fails, it can cause either a sudden drop or an increase in water pressure.
Quick Fixes to Try
- Check All Valves – Make sure your main water shut-off valve and water meter valve are fully open.
- Inspect for Leaks – Look for visible leaks and listen for running water in walls or under floors.
- Clean Faucet Aerators & Showerheads – Unscrew them and soak in vinegar to remove mineral buildup.
- Flush Your Water Heater – Sediment buildup in the heater can reduce pressure in hot water lines. Drain and flush it annually.
- Check with Your Water Provider – If neighbors also have low pressure, the issue may be city-wide.
When to Call a Plumber
- If you find a leak – A plumber can locate and repair hidden leaks before they cause water damage.
- If pressure drops suddenly – This could indicate a major pipe break or regulator failure.
- If DIY fixes don’t work – A plumber can inspect pipes, test pressure, and determine the root cause.
Undoubtedly, low water pressure can be annoying. However, with some troubleshooting, you may be able to fix a simple problem yourself. If the issue persists or quickly becomes out of your DIY scope, calling a professional plumber ensures that the problem is properly diagnosed and resolved. It’s always good to know what the problem is, but it’s better to know who to call when the problem needs fixing.
Need help with your water pressure? Contact a licensed plumber today! Mr. Rooter Plumbing, Orange County, 949.371.2025