The "black pipe" in plumbing usually refers to one of two materials, depending on its use: Black Steel (or Iron) Pipe for natural gas/propane, or ABS Plastic for drains, waste, and vents.
Yes, you can buy a house with polybutylene pipes, but do not do it without negotiating a price reduction or having the seller replace the pipes prior to closing. Polybutylene (a gray or sometimes blue plastic pipe used from the late 1970s to the mid-1990s) is highly prone to sudden, catastrophic failures because oxidants in public water make the material brittle over time.
Black iron pipes can accumulate rust and debris over time, which can lead to corrosion and reduce the lifespan of the pipes. To prevent this, make sure to clean your pipes regularly. You can use a wire brush or sandpaper to remove any rust or debris on the pipes' surface.
Black plumbing pipe is typically ABS (Acrylonitrile Butadiene Styrene) if it is plastic, or Black Iron / Black Steel if it is metal. The specific type depends entirely on what the pipe is carrying.
Black Pipe
They are also known as black steel pipes, black iron pipes or black malleable pipes. Used to transport natural and propane gas from the street or a tank to the home. Good for fire sprinkler systems because of heat resistance. Hub-and-spigot cast iron pipes should be installed by professionals.
Black Alkathene pipes are a type of plastic pipe which was developed in the 1930s and used in houses from the 1960s.
There are five main types of plumbing pipe materials that are still in use today: copper, galvanized steel, polyvinyl chloride (PVC), acrylonitrile butadiene styrene (ABS), and cross-linked polyethylene (PEX).
A black water pipe is typically called black poly pipe (High-Density Polyethylene or HDPE), ABS pipe, or black iron pipe, depending on what it is used for:
Using black iron or steel pipe for potable (drinking) water is not recommended and usually against plumbing code. Black pipe is primarily used for gas or propane lines and will rust rapidly when exposed to water, leading to contaminated water, pressure drops, and pipe failure.
While standard plumbing PVC is typically white or gray, black PVC pipe does exist. It is generally used for specialized applications such as furniture-making, pond filters, or UV-resistant outdoor plumbing. If you have a black pipe in your home's standard drain system, it is likely ABS (Acrylonitrile Butadiene Styrene) plastic rather than PVC.
PMRs for malignancies of the stomach, kidney, brain, and lymphopoietic system were also elevated, especially among plumbers. Chronic rheumatic heart disease, emphysema, liver cirrhosis, and all external causes of death were the major non-cancer causes with significantly elevated PMRs.
Black Iron Pipe
Interior Pipes: In a dry, protected environment like the inside of your walls, black iron can easily last for 75 years or more. Underground Pipes: When buried, black iron is much more susceptible to moisture in the soil, which accelerates rusting.
However, recent failures and the lawsuits that have followed those failures lead to the idea that PEX plumbing systems aren't as good as once assumed. PEX systems can fail in either the pipe or in the fitting. The most notable failure occurs when the fittings fail and water starts leaking and causing visible damage.
Homeowners insurance typically does not cover polybutylene (PB) pipes. Insurers classify them as high-risk due to a history of defects and leaks. While some companies may offer coverage, they will generally exclude water damage, add surcharges, or require you to completely replace the plumbing system.
3 Plumbing Pipe Materials You Don't Want In Your Home
Yes, polybutylene (PB) pipe absolutely needs to be replaced. Widely used between the late 1970s and mid-1990s, PB pipes degrade and become brittle when exposed to oxidants and chlorine in public water supplies. Because they are prone to sudden, catastrophic ruptures, most plumbers consider it a matter of "when" they will fail, not if.
PVC is most commonly used for drain, waste, and vent lines. It is not recommended for use in potable water lines because it can leach chemicals into the water. CPVC is most commonly used for potable water lines.
The last cast iron sewer pipes were installed in American homes in the early 1980s. Most areas stopped using cast iron by the 1970s. Here's why cast iron fell out of use in residential sewer systems: Cost.
In plumbing, the "135-degree rule" is a code standard that dictates how much a horizontal drain pipe can bend or change direction. It limits the total cumulative angle of pipe fittings before a system requires an access point (cleanout) or must be vented, ensuring proper flow and preventing chronic clogs.
To quickly identify polybutylene pipes in your home, check the main water supply lines for flexible, gray plastic tubing stamped with the code PB2110. You can easily spot these in unfinished areas like basements, around your water heater, or under your kitchen and bathroom sinks.
ABS: Short for acrylonitrile butadiene styrene, this sturdy plastic was one of the first plastics used for residential plumbing. ABS pipes are always black and tend to be softer than PVC. They are mainly used for vent and drain lines, along with other outdoor underground uses where cold temperatures are common.
The term "black water" can refer to sanitary plumbing (wastewater from toilets) or to black polyethylene water utility lines. Pipe sizing depends strictly on which system you are building.
Polybutylene (PB) was a plastic manufactured between 1978 and mid-1995 for use as piping in home plumbing systems.
The two most commonly used types of pipes are Copper and PEX (cross-linked polyethylene). They are the industry standards for household and commercial water supply lines due to their reliability and specific benefits:
Black pipe, often referred to as black iron pipe, is a heavy-duty, uncoated carbon steel piping mainly used to transport natural gas or propane in residential and commercial buildings. It gets its dark color from the natural iron oxide scale that forms on the metal’s surface during manufacturing.