Buying a house can be an exciting time, but before you sign the contract, it’s important to make sure that you know what you are buying.

    Your new home’s plumbing system may have some common problems that can lead to expensive repairs if left unmanaged. Leak detection and other methods used by experts can help find and fix minor issues before they become more difficult to deal with. This will save you money and ensure your new home’s plumbing will work for years‌ to come.


    Leak Detection

    Water leaks contribute to structural damage and are often a sign of a deeper problem with the plumbing system. Unfortunately, most of any home’s plumbing is inside its walls, floors, and ceilings, so it can be difficult to find the source of a leak.

    Professional plumbers use a method known as acoustic leak detection. This involves specialized listening devices and software. The plumber will first turn off all water in the home and listen for any running water noises that shouldn’t be there. They can isolate the noise and pinpoint its location, even tracing it through walls and floors. This prevents the need for exploratory destruction of drywall or flooring to chase the leak.


    Hot Water System

    Most hot water heaters have an expected life of 8–12 years when not regularly serviced. Check the compliance plate of the hot water system in your prospective new home so you know its age and roughly when you’ll need to replace it.

    To maximize a water heater’s lifespan, I recommend servicing it annually. This involves draining and flushing mineral deposits, checking parts for wear, and testing pressure relief valves. Neglecting service can lead to corrosion and leaks.

    Visible rust and brown or discolored water running through hot water taps can indicate corrosion in the water heater. Once this occurs, it’s time to replace the unit. Depending on your brand, replacing a water heater can range between $800 to $1,500.

    When replacing a water heater, consider its location and whether it can be shifted to avoid leakage issues in the future. For example, a basement location may be better than a main-floor utility closet. This would contain any leaks in the basement instead of damaging finished living spaces.

    Keep in mind that moving a water heater’s location can add $200-$500 in plumber labor fees to the overall replacement cost.


    Water Meter

    Most water meters are in the front of a property, inside the basement, or outside the home. They record the amount of water a home uses. Check the water meter of your new home to find out you have a potential leak.

    Water Meter
    Image Credit: Canva

    Staying on top of leaks is important because water damage can be expensive to repair if left unaddressed. Rot, mold growth and potential structural issues can occur. Checking your water meter periodically for anomalies is a good maintenance practice.

    To test the water meter, turn off the water fixtures, wait, and check to see if the water meter has changed. If you are not using any water, but the meter is still turning, it could mean the home has a leak.

    The rate of change in the water meter can indicate whether the leak is large or small. However, even minor leaks can cause significant damage over time and lead to expensive repairs.

    Watch the leak detector dial closely right after shutting off all water. Quick movement indicates a major leak, while slow ticks may just be trapped pressure releasing from pipes. Leak size helps determine repair urgency and cost.


    Taps and Fixtures

    The water flow of taps and fixtures can indicate if there are any issues in associated pipes. Strong and consistent water pressure, as well as immediate hot water, are both signs of a healthy plumbing system.

    You should also check the drainage rate of sinks, showers, and other fixtures to make sure there are no blockages. Water should go down drains quickly and without any delays, including flushing the toilet.

    Poor water pressure and slow drains can indicate leaks or other problems with entry and exit pipes to fixtures. These issues should be investigated further by professionals.

    Run both hot and cold water at all sinks to check the pressure. Flush toilets to make sure proper operation. Run showerheads and tub faucets simultaneously to test available water volume. 


    Septic System

    If the home uses a septic system instead of local sewerage, it is important to check that it works properly. Septic systems require regular pumping and maintenance to stay functional. Neglect can lead to backups, overflows, and expensive repairs.

    Septic System
    Image Credit: Canva

    Running a video camera through the septic system is one of the best ways to detect issues. Professional septic inspectors can do this quickly and thoroughly.

    Broken pipes are a common problem with septic tanks as they are usually installed close to the surface outside the home, leaving them vulnerable. Causes of broken pipes can include tree roots, pipe corrosion, and blockages.

    If you notice green and healthy patches of grass growing along the sewer line, this could indicate a leak or broken pipe.

    Inspect the septic tank, distribution box, and soil absorption field. Signs of problems include foul odors, saturated soil, surfacing, sewage, or plumbing backups. Schedule a professional septic inspection and pumping.


    Call a Plumber

    Hiring a professional to check your potential home can be a smart investment to find any undisclosed plumbing issues. This service can give you more leverage as a home buyer, saving you money on your home’s sale price and ensuring you move into a home with working plumbing.

    Minor checks you can do will also help find problem areas before the professional visits, saving you time and money. However, having a home professionally checked is the best way to guarantee problem-free plumbing.

    A whole-house plumbing inspection costs $150-$500 but is money well spent. The inspector will thoroughly test all water and drainage systems using leak detection gear. The seller must repair any problems the inspector finds before closing.


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    So, Is Complete Plumbing Inspection Essential When Buying a House?

    A thorough plumbing inspection allows you to enter homeownership knowing the condition of your plumbing systems. This prevents expensive surprises later. While minor issues can wait, inspection lets you identify and ask for correction of major problems before purchase.

    Inspection also informs your maintenance plan going forward so you can be proactive. You’ll also gain useful lifecycle data on your water heater, pipes, and other equipment. Overall, a plumbing inspection gives you added peace of mind and prepares you for the responsibilities of homeownership.


    FAQs About Plumbing Inspection

    How much does a plumbing inspection cost?

    A professional whole-home plumbing inspection typically costs $150 to $500. This is a small investment compared to the costs of undetected issues.


    What does a plumbing inspector check?

    The inspector will use specialized leak detection equipment to check all supply and drainage pipes, water pressure, fixtures, water heater, sump pump, and sewer/septic system.


    What if problems are found with the plumbing?

    The seller must repair any identified issues before closing. You can use this to negotiate a lower sale price.


    When should a plumbing inspection happen?

    Schedule the plumbing inspection during your due diligence period after an accepted offer. This gives time for repairs before closing.


    Can I do a plumbing inspection myself?

    You can do some basic checks, but a professional inspector has the skills and tools to thoroughly evaluate the full plumbing system. Their inspection gives the most complete information.


    Editorial Contributors
    avatar for Jonathon Jachura

    Jonathon Jachura

    Contributor

    Jonathon Jachura is a two-time homeowner with hands-on experience with HVAC, gutters, plumbing, lawn care, pest control, and other aspects of owning a home. He is passionate about home maintenance and finding the best services. His main goal is to educate others with crisp, concise descriptions that any homeowner can use. Jon uses his strong technical background to create engaging, easy-to-read, and informative guides. He does most of his home and lawn projects himself but hires professional companies for the “big things.” He knows what goes into finding the best service providers and contractors. Jon studied mechanical engineering at Purdue University in Indiana and worked in the HVAC industry for 12 years. Between his various home improvement projects, he enjoys the outdoors, a good cup of coffee, and spending time with his family.

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    Casey Daniel

    Casey Daniel is a writer and editor with a passion for empowering readers to improve their homes and their lives. She has written and reviewed content across multiple topics, including home improvement, lawn and garden care, sustainability, and health and wellness. When she’s not reviewing articles, Casey is usually playing board games, repainting her bathroom, or quilting.

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