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Leaks in Water-Using Fixtures

    Scope
    Scope Images
    Image
    Properly install all water-using fixtures, equipment, and appliances such that there are no leaks.
    Scope

    Properly install all water-using fixtures, equipment, and appliances such that there are no leaks.

    There shall be no detected leaks from the hot water delivery system, toilets/urinals, sink faucets, showerheads, or from other fixtures or appliances.

    Compliance for toilets, shall be verified through visual assessment and by conducting a dye tablet test in each toilet to ensure the flapper is not leaking.
    For all other water-using fixtures, compliance shall be verified through pressure-loss testing on all water supplies and visual inspection.

    See the Compliance Tab for related codes and standards requirements, and criteria to meet national programs such as DOE’s Zero Energy Ready Home programENERGY STAR Single-Family New Homes, and Indoor airPLUS.

    Description
    Description

    An American home can waste, on average, more than 10,000 gallons of water every year due to running toilets, dripping faucets, and other household leaks (Figure 1).

    How Much Water Do We Use?.
    Figure 1. Residential Water Use. (Source: U.S. EPA WaterSense.)

     

    Likely sources of leaks include:

    • Pipes and fittings running between the utility’s water main and the foundation of the home.
    • All connection points in the hot water delivery system.
    • Toilet angle valves and connections.
    • Toilet flapper valves.
    • Hot/cold water connection hoses and valves at kitchen and bathroom faucets (Figure 2).
    • Shower arm and showerhead threaded connections (Figure 3).
    • Shower diverter in bath/shower combinations (Figure 4).
    • Connections and valves to dishwashers, clothes washers, refrigerator ice machines, evaporative air conditioners, water softeners, and drinking water treatment systems, if installed (Figures 5 and 6).

    Although not required as part of a WaterSense® labeled home, many devices and systems exist to detect leaks in residential plumbing systems at predetermined locations (e.g., clothes washers, dishwashers, toilets, water heaters, sinks, and pipes that may freeze). Some devices automatically shut off the water supply to the house or to the specific appliance to reduce water loss through leaks or ruptures. Other devices may sound a loud alarm for early water leak detection. Most of these devices have components that are battery operated and therefore require homeowner maintenance to ensure performance. If operating correctly, devices that automatically shut off the water may significantly reduce the amount of water loss through leaks and ruptures. They may also serve as a selling feature of the house due to their potential to reduce or prevent property damage caused by flooding.

    Installing water meters at each single-family home, if not provided by the municipality, is another way for homeowners to check for leaks. Water meters can indicate that a leak exists if flow is detected when all water fixtures are turned off. Residents could also benefit from the installation of a water meter by obtaining a more accurate account of water use for utility billing purposes.

    Under-counter piping of bathroom faucet.
    Figure 2. Hot and cold water hose connections and valves are common sources of leaks at kitchen and bathroom faucets. (Source: U.S. EPA WaterSense)

     

    Large bathroom showerhead.
    Figure 3. Threaded connections are one source of leaks in showerheads and showerhead arms. (Source: U.S. EPA WaterSense)

     

    The fittings of a bathroom shower system.
    Figure 4. The shower diverter in bath/shower combinations is one of the common sources of leaks in tub faucets. (Source: U.S. EPA WaterSense)

     

    A combination of PEX piping connectors.
    Figure 5. The pipe connections for faucets, dishwashers, garbage disposals, and other water-using appliances can be a source of leaks. (Source: U.S. EPA WaterSense)

     

    Plumbing leak in dishwasher connection.
    Figure 6. Plumbing leaks can occur in dishwasher connections. (Source: U.S. EPA WaterSense.)

     

    Success
    Ensuring Success

    To determine if there are any leaks in the home, verifiers will conduct a pressure-loss test.

    Pressure-loss testing in Single Family Homes:

    • For homes with only one water supply to the home, the verifier will attach a pressure gauge to an outside faucet, take a reading, and then shut off the municipal water supply to the house. After several minutes, the verifier will determine if the pressure has dropped. A loss of pressure indicates an unseen leak.
    • For homes with more than one water supply or without an outdoor faucet, verifiers will attach a pressure gauge to the cold water faucet for the washing machine hookup or other cold water faucet and take the pressure reading.
    • For homes with a separate water supply for irrigation (e.g., reclaimed water), the verifier will check both the outdoor and indoor water supplies for leaks using the approach described above.

    All leaks must be fixed before a home can be certified and receive the WaterSense® label certificate.

    Conducting a pressure-loss test on homes in multi-family buildings will vary based on the plumbing system design. Homes that are supplied through a single line with a shut-off can be tested at any point of use within the home. If the home is supplied by multiple supply lines, the verifier will need to coordinate with the builder to ensure that all individual supply systems are tested.

    During the verification, the verifier will check for leaks at all visible water supply connections and valves for water-using fixtures, appliances, and equipment. To check for toilet leaks from the flapper valve, the inspector will remove the tank lid and add some food coloring or a dye tablet to the tank. After about 5 minutes, if the water in the toilet bowl is colored, the flapper valve is leaking. Flush immediately upon completing the experiment and check to make sure the tank and bowl are both clear of the coloring to avoid any staining.

    If possible, the builder can fix any identified leaks while the verifier is still at the home, and those areas can be immediately re-verified. Some leaks, such as those from irrigation systems, may be more difficult to immediately fix and may require re-verification at a later date.

    Climate
    Climate

    No climate specific information applies. 

    Training
    Right and Wrong Images
    Image
    Service water pressure gauge
    Service water pressure gauge
    Image
    Plumbing leaks can occur in faucet fittings.
    Plumbing leaks can occur in faucet fittings.
    Image
    Leaking faucets can waste thousands of gallons of water each year.
    Leaking faucets can waste thousands of gallons of water each year.
    Image
    Plumbing leaks can occur in pipe connections.
    Plumbing leaks can occur in pipe connections.
    Image
    Plumbing leaks can occur in bathtub faucets.
    Plumbing leaks can occur in bathtub faucets.
    Image
    Plumbing leaks can occur in showerheads.
    Plumbing leaks can occur in showerheads.
    Compliance

    Compliance

    The Compliance tab contains both program and code information. Code language is excerpted and summarized below. For exact code language, refer to the applicable code, which may require purchase from the publisher. While we continually update our database, links may have changed since posting. Please contact our webmaster if you find broken links.

     

    Environmental Protection Agency (EPA) WaterSense® Specification for Homes

    The EPA WaterSense Home Specification states that:

    There shall be no detected leaks from any water-using fixtures, appliances, or equipment, and achieve EPA’s water efficiency criteria demonstrating that the home will use at least 30% less water than a typical home. Compliance shall be verified through pressure-loss testing and visual inspection along with a WACM score that achieves 30% efficiency compared to typical new construction. 

    Retrofit
    Existing Homes

    SCOPE

    DOE’s Standard Work Specifications describes practices to complete whole-house energy upgrades safely without injury or hazardous exposure in the section on Global Worker Safety. The Standard Work Specifications also addresses water leaks and leak detection.

    DESCRIPTION

    In existing homes, repairing leaks may involve cutting into walls or other finished surfaces. If cutting through plaster and wood lath surfaces, additional care will be required to minimize crumbling of the plaster. High-speed cutting tools, such as powered multi-tools or an angle grinder with a diamond blade, can assist in making clean cuts through the plaster and lath (but will create a considerable amount of dust. A vacuum operating next to the tool while cutting can capture some dust. Another trick is to apply a sealing compound to the back side of the lathe, if it is accessible, prior to cutting to minimize flexing. Masking tape may be applied to the lines to be cut to help hold lathe together. Wetting may also help reduce dust generation.

    Existing surfaces may be finished with paint containing lead, especially in homes built before 1978. Old plaster may contain asbestos. The following assessment guide contains information on hazardous materials:  Pre-Pre-Retrofit Assessment of Hazardous Materials.

    Any penetrations through exterior walls, or floors, or ceilings that abut nonconditioned space must be sealed. See the guides on air sealing electrical wiring and plumbing penetrations. Other guides are also available that cover other air sealing strategies. Use “Search” to find specific topics, such as garage walls, ceilings, and others.

    More

    More Info.

    Access to some references may require purchase from the publisher. While we continually update our database, links may have changed since posting. Please contact our webmaster if you find broken links.

    References and Resources*
    Author(s)
    U.S. Environmental Protection Agency,
    WaterSense
    Organization(s)
    EPA,
    WaterSense
    Publication Date
    Description
    Brochure providing information for homeowners, builders, verifiers, and facilities including an overview of program criteria, the certification process, and EPA-approved home certification organizations for water-efficient homes under the U.S. Environmental Protection Agency's (EPA's) WaterSense...
    Author(s)
    U.S. Environmental Protection Agency,
    WaterSense
    Organization(s)
    EPA,
    WaterSense
    Publication Date
    Description
    Document of requirements including checklist that establishes the criteria for water-efficient homes under the U.S. Environmental Protection Agency's (EPA's) WaterSense program, Version 2.0.
    Author(s)
    U.S. Environmental Protection Agency,
    WaterSense
    Organization(s)
    EPA,
    WaterSense
    Publication Date
    Description
    Website providing a description of the WaterSense labeled homes program and a checklist of mandatory requirements for homes to be labeled under the U.S. Environmental Protection Agency's (EPA's) WaterSense program, Version 2.0.
    Author(s)
    U.S. Environmental Protection Agency,
    WaterSense
    Organization(s)
    EPA,
    WaterSense
    Publication Date
    Description
    Webpage from U.S. Environmental Protection Agency describing the EPA WaterSense program including the Mandatory Checklist for WaterSense Labeled Homes, information on how to get certified, and information on finding or becoming a WaterSense Home Certifying Organization.
    Author(s)
    U.S. Environmental Protection Agency,
    WaterSense
    Organization(s)
    EPA,
    WaterSense
    Publication Date
    Description
    Resource that provides a directory of individuals that have successfully completed all requirements of at least one WaterSense Approved Certification Method (WACM) through a Home Certification Organization (HCO).
    Author(s)
    EPA
    Organization(s)
    U.S. Environmental Protection Agency
    Publication Date
    Description
    Resource that provides a directory of individuals that have sucessfully completed all requirements of at least one WaterSense labeled professional certification program.
    Author(s)
    U.S. Environmental Protection Agency
    Organization(s)
    EPA
    Publication Date
    Description
    Website providing lists of WaterSense-qualified products for home plumbing and irrigation equipment that meet the requirements of the U.S. Environmental Protection Agency’s (EPA’s) WaterSense program.
    Author(s)
    Home Inspector Potomac
    Organization(s)
    Home Inspector Potomac
    Publication Date
    Description
    Article describing water leak detection and modes of testing (video camera inspection, hydrostatic pressure, electronic listening, isolation, and digital testing).
    *For non-dated media, such as websites, the date listed is the date accessed.
    Contributors to this Guide

    The following authors and organizations contributed to the content in this Guide.

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    Building Science Measures
    Building Science-to-Sales Translator

    Water Efficient Indoor =

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    Technical Description

    Water is an increasingly precious commodity. Choices in fixtures, appliances, and even design can help conserve this vital resource.


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