City water pipes are a vital part of our daily lives, but have you ever stopped to think about what's really going on beneath our feet? The average American city has over 1 million miles of water pipes, with some pipes dating back to the 19th century.
The majority of city water pipes are made of cast iron, which can last for decades, but also corrodes over time, reducing water pressure and quality. In fact, a single leak in a city's water distribution system can waste up to 14 million gallons of water per day.
City water pipes are often buried underground, but can also be exposed above ground in areas like construction zones or parks. Have you ever seen a water main break in your neighborhood? It's a messy and inconvenient situation, but it's also a reminder of the importance of maintaining our city's water infrastructure.
From main breaks to water quality issues, understanding city water pipes and infrastructure is crucial for keeping our communities safe and healthy.
Types of City Water Pipes
Ductile Iron pipe is a popular choice for water services larger than 2″ in diameter. It's used for fire sprinkler mains and large buildings like apartment or office buildings.
Ductile Iron pipe is the same material used in NYC's distribution system. It's known for lasting many decades.
Ductile Iron pipe is unique because it's put together using push-on joints or mechanical joint retainer glands. This means it's not threaded like typical pipe or flared like copper tubing.
Ductile Iron Mechanical Joint pipe contains no lead whatsoever. This is a significant advantage over other materials.
Ductile Iron pipe is far superior to cast iron or extra heavy cast iron, especially in unstable ground conditions. It's a preferred choice for house sewer installations as well as water mains and services.
David Balkan, the CEO of Balkan Sewer And Water Main, is a respected expert in the field. He's active in NYC plumber organizations and provides valuable input to city agencies.
Replacing City Water Pipes
Replacing City Water Pipes is a complex task that requires careful planning and execution. The average city water pipe lasts for around 50 years before needing to be replaced.
In the US, it's estimated that over 6 million miles of water pipes are in need of replacement. The cost of replacing these pipes can be staggering, with some cities facing bills of over $1 trillion.
Replacing city water pipes involves digging up streets and roads, which can be a huge inconvenience for residents and businesses. However, it's a necessary step to ensure safe and reliable drinking water.
What It Takes to Replace
Replacing a lead service line is a significant undertaking that requires careful planning and execution. To replace a lead service line, you'll need to run a new copper service from the water main in the street all the way into the house.
There are two main methods to accomplish this: open trench replacements and trenchless construction. Open trench replacements involve digging a trench from the home through the parkway to install the new service and access the water main.
The type of procedure performed will depend on several factors specific to each replacement, such as the location and accessibility of the water main.
Hire a Contractor
To hire a contractor for your city water pipe replacement project, start by selecting a licensed plumber from the list of contractors.
Visit the list of licensed plumbers to find a reliable contractor.
Ask the contractors you interview a list of suggested questions, including those listed on the provided resource.
You can also refer to the list of plumbing contractors licensed to work in Chicago for more options.
Return
Replacing lead pipes is a serious business, especially since they're still present in older homes. The City of Dover has proactively replaced known lead pipes in the public City water system.
Lead pipes are made of a silver-colored, malleable material with a round shaped "wipe joint" just before the main control valve. They can't be threaded like regular pipes, so wiped joints were used instead.
If you suspect a lead water service line, it's essential to have it tested inexpensively. Lead is not naturally found in drinking water, so if it's present, it's likely coming from the water main distribution system or house plumbing.
Running the tap for 15 to 30 seconds before use can help eliminate the possibility of ingesting lead. This precaution is especially important if the tap hasn't been run for 6 hours or so.
If repair work is needed on a lead service line, by law it must be fully replaced. This is because even small hairline cracks can form into a leak within 18 months or less.
Programs and Initiatives
If you live in a house or two-flat built before 1986, there's a high likelihood that your water service line is made of lead unless it was replaced during renovation or an addition.
The City of Chicago is offering two voluntary lead service line replacement programs as part of a multi-year effort to remove all lead lines.
You can hire a contractor to remove the full existing lead service line and the City will waive up to $5,000 in permit fees.
If you hire a contractor and remove the existing lead service line, the City of Chicago will waive the permit fees for the project, which could amount to a savings of up to $3,100.
To qualify for this program, your request for the fee waiver must be a standalone and not made in conjunction with a home renovation or expansion.
Commercial and mixed-use residential/commercial locations are not eligible for this program at this time.
The City will also attach the new service line to the water main and provide a free water meter for the contractor to install, if there isn't already one in place.
Water Infrastructure
Water Infrastructure is a complex system that brings water from its source to your tap. Water leaves the source and travels through a network of treatment facilities, reservoirs, pipes, and valves.
The flow of water is managed by staff who ensure its quality throughout the system. They work hard to maintain the excellent quality of the water you drink every day.
Columbia South Shore Well Field
The Columbia South Shore Well Field is a high-tech groundwater system that includes more than 20 active wells.
This system plays a crucial role in providing Portlanders with excellent water year-round, even during high-demand summer months.
Our ongoing investments in this secondary water source help keep the water flowing, especially during unexpected events in the watershed.
This reliable water source is a vital part of Portland's water infrastructure, ensuring that residents have access to clean drinking water at all times.
Water Journey
Our water's journey from the source to your tap is a complex one, involving treatment facilities, reservoirs, pipes, and valves. It's a long way from the source to your home.
The water flows through a network of pipes and valves, managed by staff who ensure its quality. This process is crucial to keep our water safe and clean.
In Chicago, the city is working to replace its almost 400,000 lead service lines. These lines transport water from the water main in the street into homes.
To be eligible for the city's lead service line replacement programs, homeowners must meet certain criteria. Here's a summary of the requirements:
- Live in a home you own.
- Have a household income below 80% of the area median income ($72,800 for a family of 4).
- Have consistent results of at least 15 parts per billion of lead in your water in free testing done by the Department of Water Management.
Powell Butte Reservoirs
Powell Butte Reservoirs are a crucial part of Portland's water infrastructure, located at Powell Butte Nature Park.
The reservoirs are buried underground and have a higher elevation than most of the city, making them the perfect location to store drinking water and use gravity to move it throughout the city's vast system of reservoirs, tanks, and pipes.
Each reservoir can hold up to 50 million gallons of water, which is equivalent to the size of four football fields and a height of three stories.
Powell Butte is also the receiving point for water from the Bull Run treatment facilities, which brings water from the watershed to the reservoirs via massive conduits that are up to five and a half feet wide.
These conduits carry water for miles to reach Powell Butte, where it can be blended with water from Bull Run, providing a reliable supply of water for the city.
The reservoirs give us time to adapt to unexpected events or variations in water use without interrupting water service, thanks to their large capacity.
Washington Park and Kelly Butte Reservoirs
The Washington Park and Kelly Butte reservoirs are two crucial water storage facilities in Portland, Oregon. The Kelly Butte Natural Area houses an underground reservoir that holds 25 million gallons of water.
This reservoir provides water directly to customers throughout the east side of Portland. It's a vital part of the city's water infrastructure.
The Washington Park Reservoir, on the other hand, is a 12.4-million-gallon underground reservoir that supplies water to over 360,000 people. Completed in 2021, it replaced older reservoirs built in the 1890s.
Gravity brings water from the Willamette River to the Washington Park Reservoir, which then distributes water throughout the west side of Portland.
Maintenance and Repair
City water pipes can last for 50 to 100 years, but they still need regular maintenance to function properly.
Leaks are a common issue, accounting for 14% of water loss in the US, and can be caused by corrosion, cracks, or worn-out joints.
Regular inspections can help identify potential problems before they become major issues.
Pipe replacement is often necessary, with over 600,000 miles of water mains in the US needing replacement every year.
Proper maintenance can extend the lifespan of water pipes and reduce the risk of contamination and other hazards.
Breaks and Leaks Program
If your service line breaks or leaks, you'll need to call 311 to report it. The Department of Water Management will then contact you to schedule a replacement.
The replacement program covers both the private and public sides of the line, and it's free.
Follow-Up Testing
If you've already had your water tested and found elevated lead levels, you can request free follow-up testing to ensure the issue is resolved. You can call 311 or visit chicagowaterquality.org to request the test.
To get started, you'll need to complete the online application or download the application form. Make sure to submit all supporting documents, as incomplete applications won't be processed.
Once you've submitted your application, it will be processed in the order it was received, so be patient. You can also request a free water test kit on chicagowaterquality.org if you haven't already done so.
Self-Checking and Reporting
To identify the material of your service line, you can perform a simple scratch test. This involves using a house key or coin to carefully scratch the pipe's surface and compare it to the descriptions provided.
A copper pipe is the same color as a penny, and older copper pipes may show colors of green or blue. A magnet will not stick to a copper pipe.
To determine if your pipe is galvanized, look for a black, dull gray, or silver pipe with threaded ends. If a magnet sticks to it, it's likely galvanized.
Lead pipes are dull gray or silver and soft, leaving a noticeable shiny scratch on the surface. A magnet will not stick to a lead pipe.
To report your findings, take a picture of the scratched surface, showing the material of your service line. This should include the section of the pipe between where it enters your property and the water meter.
Here's a quick reference guide to help you identify the material of your service line:
After completing the scratch test and taking a picture, report your findings through the City of Dover's online survey to help create a public inventory of service line materials.
Pipe Materials
Pipe materials can be a crucial aspect of city water pipes, and there are a few common types to consider.
Lead service lines can be a concern, as they can leach into the water supply over time. Check your service line to see if it's made of lead.
PEX pipe, on the other hand, has gained popularity in recent decades due to its flexibility and corrosion resistance. It can bend around corners and through walls and floors, making it a convenient option for plumbers and DIYers alike.
Copper Tubing
K copper is the material used for most water services lines in NYC, and it's actually water tubing, not a pipe material. K copper tubing is used for water services up to 2″ in size.
A key characteristic of K copper water services is the flare fittings at the end of the tubing. This makes it easy to connect and disconnect the tubing.
The fact that copper tubing is malleable is a big plus, allowing it to bend without damaging the service line. This flexibility helps copper tubing withstand ground shifting better than other approved materials.
K copper water services can last in excess of 50 years, making them a reliable choice for plumbing.
PEX (Plastic)
PEX (Plastic) is a popular choice among professionals and DIYers alike, with its numerous benefits making it a great option for plumbing projects.
Fewer pipe connections are needed with PEX, which alleviates installation labor and reduces the potential for leaks.
PEX is a flexible plastic material that can bend around corners and through walls and floors, making it easy to install.
It can connect to a PEX manifold that is itself connected to the main water supply, eliminating the need to make a pipe connection every time there is a change in direction.
PEX is also corrosion-resistant and can expand, offering resistance to cracks as temperatures drop to freezing.
A lacquer finish is often applied to PEX, colored red or blue to distinguish between hot and cold supply lines.
PEX can be connected to existing metal supply lines using the appropriate fittings, eliminating the need for soldering completely.
The hydrostatic pressure rating of PEX pipe and fittings ranges from 160 pounds per square inch (psi) at 73°F to 100 psi at 180°F.
CPVC (Plastic)
CPVC, short for Chlorinated Polyvinyl Chloride, is a type of plastic pipe material that's resistant to corrosion and chemicals.
It's often used for irrigation systems and outdoor plumbing due to its durability and resistance to UV rays.
CPVC pipes are available in different diameters and lengths, making them a versatile option for various plumbing projects.
They can be connected using solvent welding, which creates a strong and leak-free bond.
CPVC pipes are also relatively easy to install, as they can be cut and fitted together using standard fittings.
This makes them a popular choice for DIY projects and professional plumbers alike.
In terms of temperature resistance, CPVC pipes can handle water temperatures up to 200°F (93°C).
This makes them suitable for use in hot water systems and high-temperature applications.
CPVC pipes are also relatively inexpensive compared to other pipe materials, making them a cost-effective option for many projects.
However, they're not suitable for use with gas or fuel, as they can be damaged by these substances.
Galvanized Pipe Material
Galvanized pipe material is a type of pipe that's primarily found in areas of NYC where residents were previously serviced by a private water supply company. Galvanized pipe is a pipe that's made of steel dipped in protective zinc to prevent corrosion.
It's worth noting that galvanized pipe is not legal in NYC as a material for a water service. This is because it reacts to contact with water or moisture, and corrodes on both the outside and inside of the piping.
Galvanized pipe is easy to identify as it's the only water service material that's magnetic. Simply place a magnet on the water service, and if it sticks, the service is galvanized.
Typically, when water is turned on in a house with galvanized piping, the initial water will be rust-colored or contain rust.
Ductile Iron Pipe
Ductile Iron pipe is a cement lined material used for water services larger than 2″ in diameter.
It's a popular choice for fire sprinkler mains and large buildings like apartment or office buildings. Ductile Iron pipe is actually the same material used in NYC's distribution system, known for its durability.
Ductile Iron pipe lasts for many decades, making it a long-lasting option. In fact, it may be the most durable water main pipe material approved for use in NYC.
It's unique in that it's put together using either push-on joints or mechanical joint retainer glands with set screws. This means it's not threaded like typical pipe, nor flared like copper tubing.
Ductile Iron Mechanical Joint pipe contains no lead whatsoever. This is a big plus, especially for those concerned about lead contamination.
In some cases, ductile iron pipe is used for house sewer installations, especially in unstable ground conditions. This is a significant improvement over the previous material used, cast iron.
Verify Material
To verify the material of your pipes, you need to check for lead.
Lead is often used in older service lines, which can be a concern for your health and the environment.
Check your service line for lead by following a few easy steps to determine if your service line is lead.
Brass – Brass
Brass is a metal primarily composed of copper and zinc, with copper being the main component.
Brass is stronger and harder than copper, but not as strong or as hard as steel.
It's worth noting that brass is not a magnetic material, so a magnet can be used to test whether a water service is galvanized or brass.
Brass pipe is threaded at each end and connected by brass couplings.
Brass has a life expectancy in excess of 50 years, making it a durable option for water service lines.
Brass water service lines have a thicker wall thickness than K copper water tubing.
In New York City, brass is only used for a 2 1/2″ water service line, making it a less common choice.
Brass is extremely expensive compared to other approved water supply line materials, which may limit its use.
Frequently Asked Questions
What does the inside of city water pipes look like?
City water pipes can have varying appearances depending on the material, with galvanized steel pipes appearing black and rusty, copper pipes showing green corrosion, and plastic pipes having a layer of black gunk. The exact appearance can give clues about the pipe's condition and material.
How long do city water pipes last?
City water pipes typically last between 20-70 years, with their lifespan varying depending on the material used. The durability of these pipes can be influenced by factors such as maintenance and environmental conditions.
Sources
- https://www.contractormag.com/piping/article/21259794/an-overview-of-water-supply-pipes-and-joining-methods
- https://www.leadsafechicago.org/lead-service-line-replacement
- https://www.dover.nh.gov/government/city-operations/community-services/service-line-inventory/service-line-materials/
- https://www.portland.gov/water/about-portlands-water-system
- https://www.balkanplumbing.com/nyc-water-main-pipe-material-tutorial/
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