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Types of Pipe Used for Water

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Ever wonder what types of pipe are safe to transport drinking water? Take a look at this list of commonly used types of water pipes. Although there are other types of pipes used for water, these are some of the most common ones that can be found at your local home improvement or hardware stores.

PVC

PVC stand for PolyVinyl Chloride. This type of pipe has a wide variety of plumbing uses from drainage pipe to water mains. It is most commonly used for irrigation piping, home, and building supply piping. PVC is also very common in pool and spa systems. PVC is often white but it can also come in a wide variety of colors. You can often tell what it is used for by the colors and marking on the pipe. For example purple pipe with black lettering is used for reclaimed water. PVC also comes in a variety of thicknesses called schedules. Schedules 40 being the most common for water distribution.

PVC pipe should always be clearly labeled if it is used for both potable (drinkable) and non potable water in the same building. PVC joins are made by using a primer that softens the PVC and then applying PVC glue that melts the joints and pipe together.

CPVC

CPVC stands for Chlorinated Polyvinyl Chloride. This type of pipe can stand temperatures up to about 180 degrees (this depends on the schedule) or so and can be used for hot and cold water inside of a house or mobile home. CPVC is the same outside diameter as copper and PEX so push fit fittings that fit PEX and copper, such as SharkBite, will fit the CPVC pipping. Like with PVC you should use primer and a glue when making a CPVC joint. Also, make sure the glue you are using says that is can be used on CPVC. This glue is usually a different color like orange so you know that it is used for CPVC.

PEX

PEX stands for Cross-linked polyethylene or XLPEl but, PEX is much easier to remember and say. PEX is commonly used for hot and cold water in homes and as hydronic heating due to its resistance to hot and cold temperatures. PEX is widely used now for its competitive pricing, ease of use, and the long rolls of piping that it can come in. PEX is jointed in many different ways including push fit fittings and specialty PEX tools used with crimp rings to secure the joints.

Copper Pipe

This type of pipe is mostly used for hot and cold water distribution as well as being regularly used in HVAC systems for refrigerant lines. Copper piping works in both underground and aboveground applications, but copper can be affected by some soils and should be sleeved if used underground. Due to the price of copper and longer labor needed to install many builders are switching to alternative water distributions piping like PEX. Copper comes in different thicknesses which are labeled M, L, and K. M is the thinnest grade of copper. Copper is connected by soldering pipe into the fittings.

Galvanized Pipe

Galvanized pipe is a zinc coated steel or iron pipe. This galvanized coating keeps the water from eating up the pipe. Because of the amount of work that goes into cutting, threading, and installing galvanized pipe it is not used in homes very often any more. Galvanized pipe is still considered a safe transport for drinking water and is still seen in larger commercial applications for water distribution. If you have a pre 1970s house you could still have galvanized water lines in your house if it has not been re-piped.

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