It is also far less expensive compared to many other piping materials.
PEX pipes are easy to cut and join.
Plus, they’re typically color-coded red for hot water and blue for cold water.
The Spruce / Michela Buttignol
Use for: Use PEX pipe as hot and cold water distribution lines within the house.
Also use PEX for hydronic piping and distribution, such as for radiators.
Tip
Check your local codes before installing PEX pipe.
The Spruce / Kevin Norris
While it is commonly used across the United States, it is not permitted everywhere.
It initially gained popularity because it was lighter and easier to work with than traditional galvanized steel pipe.
It’s also inexpensive and fairly durable.
The Spruce / Kevin Norris
It glues together with solvents.
Use for:PVC pipe and fittings are not rated for highly pressurized applications.
PVC pipe is commonly used for below-ground exterior irrigation water supply.
The Spruce / Kevin Norris
Like PEX pipe, PVC pipe is not permitted everywhere.
So check your local regulations before installing.
Rigid copper is often used for water supply lines within the home.
The Spruce / Kevin Norris
Rigid copper also is quite durable, and it can be cut easily with a tubing cutter or hacksaw.
However, it is fairly expensive.
Use for:Rigid copper pipe is routinely used for sinks, showers, tubs, and other fixtures.
The Spruce / Kevin Norris
Though termed “rigid,” rigid copper pipe can be bent to some degree.
Among the multiple options for connections, the best is the solder-pop in connection.
The solder connection requires experience coupled with safety protocols.
The Spruce / Kevin Norris
It’s mainly used as a vent and drain line.
But like PVC, it isn’t accepted by building codes everywhere, so check your local regulations.
It’s generally not permitted for use inside walls or floors.
Flexi pipe comes in many lengths and sizes.
It also is expensive, though you typically don’t need much of it for a project.
Warning
Do not use flexible pipe in enclosed applications, such as inside walls or floors.
While it has good durability, it’s also pricey to install.
Each end of the pipe is threaded, and individual pipes are screwed into each other with connecting fittings.
Cast iron is rigid, dark gray piping that was often used for sewer and other drainage purposes.
It is still found in many homes and is used today in some commercial and high-rise building applications.
Cast iron is expensive but durable with good longevity.
It’s viable until the point that it rusts completely through.
It’s also very heavy and difficult to cut.
Retrofits tend to replace cast iron pipes with rigid plastic pipes, such as ABS.
Use for:Use galvanized steel pipe for water supply lines, drain, and vent lines.
For most homeowners, galvanized pipe will mainly be found in the form of gas supply lines.
For instance, you might need a more flexible pipe for tight areas.
Cost also will be a factor in your decision.
In general, a perk of more expensive piping is it tends to last longer.
So ultimately you might save money in the long run.
Speaking with a contractor or other plumbing expert can help you make an informed decision for your project.
Copper and PEX are the most common pipe materials used in homes.
Copper pipes are durable, corrosion-resistant, and can be used for hot and cold water.
Plumbing piping is used for three primary reasons: toilet sewage, stormwater drainage, and drinking water.
In each case, these systems bring and remove water into and from the home.
They are long-lasting and won’t leach chemicals into your drinking water.
Plumbing and Pipes: Healthier Choices.Environmental Working Group.
