WHAT CAUSES LOW WATER PRESSURE IN THE HOUSE?

What Causes Low Water Pressure in the House?

What Causes Low Water Pressure in the House?

Blog Article

There’s nothing more frustrating than stepping into the shower or turning on the tap—only to be greeted by a weak trickle of water. Low water pressure is a common issue in many homes, and while it may seem like a minor inconvenience, it often signals deeper plumbing problems that need attention.

If you're living on the South Shore of Montreal and experiencing persistent water pressure issues, Plomberie Rive Sud can diagnose the root cause and restore proper flow to your home. Here's what you need to know about what causes low water pressure—and what you can do about it.



1. Clogged Pipes


Over time, mineral deposits, rust, and debris can accumulate inside your pipes, especially if your home has older plumbing or hard water. These blockages gradually reduce the internal diameter of the pipe, limiting water flow and lowering pressure at your fixtures.

Solution: A professional plumber can inspect your pipes using specialized tools and determine whether a pipe cleaning, replacement, or water softening system is needed.



2. Faulty Pressure Regulator


Homes equipped with a pressure regulator rely on this device to control the pressure coming in from the municipal water supply. If the regulator fails, you could experience sudden changes in water pressure—either too high or too low.

Solution: Replacing a faulty pressure regulator is a job best left to a licensed plumber. It involves shutting off the water and working directly with your main line.



3. Corroded Plumbing


Older galvanized steel pipes are especially prone to corrosion, which restricts water flow and causes pressure to drop over time. Corroded pipes can also leak or burst, leading to more serious issues.

Solution: If your home has aging galvanized plumbing, it may be time for a whole-house repipe using modern materials like PEX or copper.



4. Leaking Pipes


Leaks—especially hidden ones—can divert water away from fixtures and lead to a noticeable drop in pressure. They also increase your water bill and pose a risk of water damage.

Signs of a leak:

  • Wet spots on walls or floors

  • Musty odors

  • Mold growth

  • Unexpectedly high water bills


Solution: A professional leak detection service can identify the source and perform repairs before the damage gets worse.



5. Partially Closed Shutoff Valves


Sometimes, the main water valve or individual fixture valves are only partially open after maintenance or repair. This restricts water flow throughout the system or to specific faucets.

Solution: Check all shutoff valves in your home to ensure they’re fully open. If you’re unsure which valve controls what, a plumber can walk you through it.



6. Municipal Supply Issues


Low water pressure isn’t always caused by something inside your home. Sometimes, your city or municipality might be experiencing supply issues, performing maintenance, or dealing with main line leaks.

Solution: Contact your local water provider or check community notifications to confirm if there's work being done in your area. If the problem persists after municipal work ends, it could still be an issue within your system.



7. Shared Supply Lines


If you live in a multi-unit building or a neighborhood with shared water mains, high usage at certain times (like early morning or evening) can lead to temporary dips in pressure.

Solution: Installing a pressure booster system in your home can help maintain consistent pressure even during peak usage times.



When to Call a Professional


While some pressure issues can be resolved with basic checks, many causes—like internal leaks, pipe corrosion, or regulator failure—require professional expertise. Delaying a fix can lead to bigger problems, including structural damage and costly repairs.

At Plomberie Rive Sud, we offer comprehensive water pressure diagnostics and repair services throughout the South Shore. Our team is equipped with the tools and experience needed to identify the issue quickly and get your plumbing system running smoothly again.



Don’t Let Low Pressure Slow You Down


Water pressure problems can disrupt your daily routine and signal more serious issues behind the scenes. Don’t ignore the signs. Reach out to Plombier Montreal for a professional inspection and lasting solution.

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