How To Troubleshoot Low Water Pressure in Your Home
Thompson Family Plumbing is your go-to choice for residential plumbing repair and installation throughout Lake Havasu City, AZ and Hesperia, CA.


Nothing ruins your morning routine quite like stepping into a shower with barely a trickle of water coming from the showerhead. Low water pressure affects millions of homeowners and can indicate simple fixes or serious plumbing issues that require immediate attention.
Thompson Family Plumbing & Drain knows that diagnosing water pressure issues requires a systematic approach. In this guide, we will explain low water pressure troubleshooting steps to help restore optimal water flow to your home.
Start With Simple Valve Checks
The easiest place to begin troubleshooting low water pressure involves checking your home’s main water valves:
- Main shut-off valve: Located near where water enters your home; should be fully open
- Water meter valve: Found after the water meter and controlled by your utility company
- Individual fixture valves: Located under sinks and behind toilets that may be partially closed
A partially closed valve can significantly reduce the water flow rate throughout your plumbing system. Start by locating your main shut-off valve and ensuring it’s completely open. These simple checks often resolve whole-house pressure issues without requiring professional intervention.
Identify Fixture-Specific Problems
When low water pressure affects only certain faucets or fixtures, the problem likely stems from localized issues. Clogged pipes at individual locations or mineral buildup commonly cause reduced water flow. Leaky faucets can also contribute to pressure loss by diverting water before it reaches the intended outlet.
Testing each fixture individually helps pinpoint whether the issue affects your entire system or just specific locations:
- Aerator cleaning: Remove and clean faucet aerators to eliminate mineral deposits and debris.
- Showerhead maintenance: Soak showerheads in vinegar to dissolve calcium and lime buildup.
- Cartridge inspection: Check faucet cartridges for clogs or damage restricting water flow.
Check Your Pressure Regulator Valve
Your pressure regulator valve controls the water pressure entering your home from the municipal water supply. When the pressure regulator valve fails or becomes clogged with sediment, it can drastically reduce water pressure throughout your home.
You can test your system’s pressure using a gauge attached to an outdoor spigot. If readings show significantly low pressure, your regulator may need adjustment or replacement.
Investigate Pipe and System Issues
More serious causes of low water pressure often involve problems within your home’s plumbing infrastructure. Older homes with galvanized steel pipes frequently experience corrosion that narrows water passages over time.
A comprehensive plumbing system inspection can reveal hidden leaks, corroded sections, or undersized branch lines that limit water delivery. Major leaks divert water away from fixtures, while shared lines between homes can reduce available pressure during peak usage times.
Prevent Pressure Problems Before They Start with the Flo Smart Water Monitor
While troubleshooting low water pressure is essential, preventing plumbing issues before they escalate is even better. That’s where the Flo Smart Water Monitor by Moen comes in. This intelligent device continuously monitors your home’s water usage, detects leaks, and even identifies abnormal pressure drops—often the first sign of a hidden plumbing problem.
With real-time alerts and automatic shut-off capabilities, the Flo Smart Water Monitor helps protect your home from costly water damage while giving you control right from your smartphone.
Special Offer: Thompson Family Plumbing & Drain is currently offering $50 off a new Flo by Moen Smart Water Monitor installation. It’s the perfect time to invest in a smarter plumbing solution that keeps tabs on your system 24/7.
Learn more about how the Flo Smart Water Monitor works and contact us today to take advantage of this limited-time offer!
Thompson Family Plumbing & Drain: Your Water Pressure Experts
Effective troubleshooting of low water pressure requires a systematic investigation of valves, fixtures, regulators, and your overall plumbing infrastructure. At Thompson Family Plumbing & Drain, we provide comprehensive diagnostic services to identify and resolve water pressure issues quickly and efficiently. Our experienced technicians use advanced tools and techniques to restore optimal water flow throughout your home.
Contact Thompson Family Plumbing & Drain at (855) 390-0457 for expert low water pressure diagnosis and repair services that get your plumbing system flowing properly again.

Devynn Thompson
What Our Valued Customers Are Saying
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“Always go above and beyond for their customers”
Once again Thompson Family Plumbing came in and took care of us as if we were their family. They always go above and beyond for their customers and make you feel like you are important to them. I can’t thank them enough for coming in and taking care of the issues that I had with my home as quickly as they did. Absolutely the best plumbing company around. Thank you, John and Devynn for everything.
-Nicole H.
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“Price was more than reasonable, especially last minute”
What a great local family company. Had a little issue today (Saturday). Gave them a call. The lady said she would have someone here between 3 & 5. It was at 1 when I called. 3:00 on the nose Don was here. Don was very friendly and had the broken pipe fixed in no time at all. The price was more than reasonable, especially last minute on a Saturday.
-Andy S.
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“Fantastic job of analyzing the situation and making all the necessary repairs”
Thank you Thompson Family Plumbing for your quick and professional service. Don did a fantastic job of analyzing the situation and making all the necessary repairs. Clients were happy with the professionalism and knowledge that Don possessed in getting the job done. Ashley went out of her way to ensure that an appointment was made asap for the clients.
-Richard B.
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“Took care of it in no time”
Plumbing technician Dean Taylor came over last week to set up a line so I could get a dishwasher installed. I didn’t have the proper setup but he took care of it in no time! Now the installers will have no problem doing it. He was very knowledgeable and professional. I will definitely have him come back for other plumbing jobs. From start to finish everyone I spoke to was very helpful! Their customer service is outstanding!
-Jackie L.
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“Gave me great peace of mind”
Great experience with TFP! They were super professional and friendly, exactly on time, fixed the issue, AND were inexpensive. I received a text when to expect them with a picture of my two technicians (Dean & Kade) AND their license numbers included in the text. This gave me great peace of mind as I am a woman that lives alone. I highly recommend Thompson Family Plumbing!
-Brisa A.
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“Integrity and honesty”
I cannot say enough good things about this amazing company. We found them through reading other people’s reviews on Yelp. They have helped us with a plumbing issue and installing a new hot water heater. They are prompt, reasonable, and incredibly helpful. John’s integrity and honesty along with the rest of the crew would make it a pleasure to recommend to anyone and everyone.
-Joyce A.