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Why is My Water Pressure Low?

Low water pressure, or low flow, is a common occurrence in homes. Whether it’s affecting your toilet, sink, or shower, it’s a frustrating problem that can be fixed. It’s important to understand what the main causes of low water pressure are so that you can find the quickest, easiest and least expensive solution. We’ll highlight the main causes of low water pressure and what you can try at home to resolve them.

Whole House Low Water Pressure

If your entire home is plagued with low water pressure, try asking your neighbors if they’ve experienced the same problem. If they are experiencing the same issue, or have in the past, it may be a community issue that a water pressure booster can help resolve. A water pressure booster will increase water pressure by the means of an electric pump and a pressure tank. You can also set your desired PSI (don’t ever exceed 80 PSI). If your neighbors haven’t experienced low water pressure, then you may have a pressure regulating valve installed without even knowing it. These are usually located on your pipes outside. Once you find it, you can increase the pressure manually. Lastly, make sure your main shut-off valve is open all the way.

Fixture Specific Low Water Pressure

If one fixture in your home doesn’t have proper water pressure, you may have a clogged aerator. These need cleaned every now and then for preventative maintenance. Simply unscrew the nozzle on your sink and soak the aerator in a vinegar solution overnight to dissolve calcium build-up. If it’s your shower that has low water pressure, you may have a clogged nozzle. Unscrew the shower head and soak it in a vinegar solution overnight. If your water pressure still isn’t up to par afterwards, you may have a clogged line.

Clogged Line

A clogged line could be due to mineral deposits, rust, or other debris in the pipe. If your fixture turns on at full pressure and then slowly decreases, a clog could be the culprit, especially if you have older pipes. You can try to resolve this issue at home by back flushing your pipes. To do this, block off the aerator on your clogged fixture. I nsert a small rubber disc, a dime, or something similar that will fit under your faucet and prevent water from coming out of the spout. Shut off your water heater completely. You can connect a hose to the drain on the bottom of your water heater and direct it outside or to a shower drain, as water will spray out. Open the drain valve at the bottom of the water heater. Next, turn off the cold water inlet valve to the water heater. Go back to your stopped faucet and turn on both hot and cold. This will force debris out of the pipes by back flushing them through the hose you attached to your water heater. You should be able to see the debris that has come out of the hose.

Leaking Pipes

Leaking pipes won’t always cause a significant change in water pressure, but they can if the leak is bad enough because all of the water isn’t making its way to you. Leaks can be caused by water pressure that is too high (over 80 PSI), water acidity, or pipes that are too old or have not been repaired properly in the past. Check all of your visible pipes for leaks and check your walls and ceilings for stains, mold, or mildew. For preventative maintenance, check your water pressure regularly with a water pressure gauge. These can be purchased at any hardware store. If you want to try a simple test at home, you can shut off your water valve and take note of the meter reading on your water meter. Check it again in a couple of hours. If the number has increased, it’s likely you have a leak.

If you’re experiencing low water pressure, don’t hesitate to call the experts here at Reddi Plumbing at 316-847-4277 for immediate assistance.


Resources found on our website are provided as general guidelines, and Raby Plumbing does not assume any liability resulting from the provided information.

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