At Doug the Plumber, we often get calls from Comox Valley homeowners wondering why their water pressure has suddenly dropped or why it seems like their plumbing has become sluggish.
Low pressure is annoying, but it can also be a sign of underlying issues that need attention. In this post, we’ll walk you through the most common causes, what you can check yourself, and when it’s time to bring in the pros.
Common Causes of Low Water Pressure
Clogged Aerators and Showerheads
This is one of the easiest fixes and often the first thing we recommend checking. Over time, mineral deposits from hard water can build up inside the tiny mesh screen of your faucet’s aerator or showerhead. When these become partially blocked, the water flow drops dramatically.
DIY Tip: Unscrew the aerator, soak it in vinegar overnight, and scrub it with an old toothbrush. If that clears things up, you’ve solved your pressure problem!
Partially Closed Shut-Off Valves
It’s more common than you’d think—sometimes after plumbing repairs or renovations, the main shut-off valve to your house or individual fixture valves don’t get turned fully back on. Even a slight restriction can result in reduced pressure.
Check the main shut-off valve (usually near your water meter or where the main line enters your home). It should be fully open.
Pressure Regulator Problems
Some homes in the Comox Valley have a water pressure regulator installed near the main supply line. This device ensures your home receives water at a safe, steady pressure. But if the regulator fails, it may cause your water pressure to drop suddenly across the entire house.
If adjusting it doesn’t help—or if you’re unsure how to do so—give us a call.
Corroded or Old Pipes
In older homes, galvanized steel or copper pipes may corrode internally over time, gradually restricting water flow. Because the corrosion happens inside the pipe, the issue can be difficult to spot without professional tools. The result? Steadily worsening water pressure and higher risk of leaks.
If you live in a home built before the 1980s and are seeing low pressure in more than one area, pipe corrosion could be the culprit.
Municipal Supply Issues
Occasionally, the problem isn’t with your home at all. Temporary changes or issues in the municipal water system can cause a noticeable dip in pressure. Nearby construction, broken mains, or maintenance work can all affect local water supply—usually only for a short time.
If neighbours are experiencing the same problem, call your local utility before assuming your plumbing is to blame.
Hidden Leaks
A leak anywhere in your system—from a basement pipe to an underground water main—can reduce pressure and waste a surprising amount of water. If your water bill has gone up but usage hasn’t changed, it’s a strong sign of a leak. Other clues include damp patches in the yard, mold or mildew near walls or floors, or the sound of running water when no fixtures are on.
Leak detection is one area where a licensed plumber can save you time, money, and damage to your home.
When Should You Call a Plumber?
If you’ve cleaned your aerators, checked the valves, and the problem still isn’t solved—or if the issue is affecting your whole home—it’s time to call in a licensed plumber. At Doug the Plumber, we use diagnostic tools to identify the source of your water pressure problem quickly and accurately. From repairing regulators to re-piping older systems, we’ll recommend the most effective and budget-conscious fix.
Preventing Future Pressure Problems
Regular maintenance goes a long way in avoiding water pressure issues. Here are a few homeowner-friendly tips:
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Flush your water heater once a year to remove sediment buildup.
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Install a water softener if you have hard water to reduce mineral deposits.
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Keep an eye on your water bills for unexplained increases.
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Book a plumbing inspection every two years to catch corrosion, leaks, or pressure problems early.
Need Help? We’re Just a Call Away
Low water pressure doesn’t have to be something you live with—and it shouldn’t be ignored. Small issues can lead to larger plumbing problems if left unchecked. Whether it’s a simple fix or something deeper in your system, we’re here to help.
Call us Today!
Doug the Plumber
Schedule a pressure check and get your home’s water flowing the way it should.
Serving Courtenay, Comox, Cumberland, and the surrounding communities.