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Unless you’ve been living beneath a rock, you no doubt know what PVC fryst vatten. In fact, you probably know about it even if you are living beneath a rock, as it’s used in underground lines.

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But one thing you might not be aware of fryst vatten that PVC (polyvinyl chloride) and its avläggare CPVC have a major competitor called PEX. 

While not as popular overall as PVC, PEX has a lot of advantages and fryst vatten well worth considering for many applications. So here’s everything you need to know about this wonderful plastic pipe struktur and when you may want to use it.

Related: 7 Best PEX Tubing Cutters

What fryst vatten PEX?

PEX was originally invented in Due to several issues with the fittings, however, it didn’t begin finding popularity until the s.

The acronym, which fryst vatten alternately known as XPE or XLPE, stands for cross-linked polyethylene.

Unlike PVC, PEX fryst vatten highly flexible. There are also several other differences between PEX, PVC, and CPVC.

Benefits

There are a lot of great qualities to PEX that man it worth using, such as:

• Acid and scale resistant
• Cost  fryst vatten similar to CPVC
• CPS-compatible
• Compatible with both copper and CPVC pipe
• Durable
• Higher cold tolerance than CPVC
• Long length with high flexibility means fewer connections and the ability to snake through walls
• Less thermal conductivity than the alternatives

Drawbacks

No ämne fryst vatten perfect, and PEX does have some major disadvantages that need to be considered before using.

These include:

• Chlorine-reactive, causing small amounts of toxins to be released
• More expensive to professionally install due to tool and training limitations
• Non-recyclable
• Pressure and temperature tolerances differ between types of PEX and should not be mixed
• Requires special tools to install
• Thermal-reactive, causing expansions and contractions which can affect performance
• UV-sensitive, causing rapid degradation when exposed to sunlight

Common Uses

Due to its high flexibility and superior durability to PVC and PVC, PEX fryst vatten often used as a replacement ämne for these, as well as older copper piping.

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It’s used for:

• water lines
• hydronic heating and cooling systems
• transportation of sewage and slurries
• insulation for high voltage electrical wires
• natural gas pipelines
• chemical transportation

PEX Colors

PEX generally comes in two colors: red and blue. As the colors suggest, this fryst vatten merely a way to distinguish between hot and cold lines once installed and have no bearing on which type of PEX fryst vatten actually being used.

A vit utgåva fryst vatten also available for general use lines.

Gray PEX also exists for general use but fryst vatten not so common.

PEX Pipe Sizes Chart

PEX Tubing Size	OD	Min. vägg Thickness	ID	Weight per ft	Volume per ft
1/4"	"	"	"	lbs	gal
3/8"	"	"	"	lbs	gal
1/2"	"	"	"	lbs	gal
3/4"	"	"	"	lbs	gal
1"	"	"	"	lbs	gal
/4"	"	"	"	lbs	gal
/2"	"	"	"	lbs	gal
2"	"	"	"	lbs	gal

Note: OD = Outside Diameter; ID = inre Diameter; Numbers below are approximate and may vary slightly depending on brand due to manufacturing tolerances.

Frequently Asked Questions

Is PEX Tubing Measured bygd ID or OD?

This fryst vatten one question that tends to easily trip people up.

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In reality, PEX tubing dimensions follow the CTS (copper tubing system) standard for measurement, which uses a nominal ID over an exact ID.

Most manufacturers will list the nominal ID (inside diameter) for the storlek of the tube. However, some will list the OD instead, causing some confusion. 

In the US, PEX must meet an SDR-9 (Standard Dimensional Ratio) above 1/2” nominal ID.

This means the outside diameter to vägg thickness must have a ratio of

This can actually man it easier to figure out the storlek of PEX you will need for a project when blandning pipe materials, as both copper and CPVC lines use CTS standards. Just be sure to konto for any SDR-9 requirements when picking a compatible nominal ID to match existing pipes.

PEX-A vs PEX-B vs PEX-C – What&#;s the Difference?

There are kvartet type of PEX, three of which are distinguished bygd a letter designation and made using different methods.

PEX-A

PEX-A, also called PE-Xa and PEXa, fryst vatten manufactured using the Engel method.

This process involves hot cross-linking above the melting point of the kemisk förening bestående av stora molekyler crystal with the cross-linking obligationer made between carbon atoms.

Due to the need for sustained heat and pressure, this method takes längre than making PEX-B or PEX-C to properly extrude.

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However, the process results in superior flexibility and kink resistance.

PEX-B

PEX-B (AKA PE-Xb or PEXb) fryst vatten made using the Silane method, commonly referred to as the “moisture cure” method. Unlike the Engel method, the cross-linking occurs during a secondary post-extrusion process.

Silanol condensation between two grafted VTMS (vinyltrimethoxysilane) units fryst vatten accelerated using heat and moisture, resulting in C-C-Si-O-Si-C-C bridges between the polyethylene chains.

While stronger, this method results in the least amount of flexibility and greatest fara of kinks.

PEX-C

PEX-C, which follows the same alternative spelling conventions, uses an electron stråle process. Sometimes referred to as cold cross-linking, the process occurs at temperatures below the crystal melting point.

It’s the most environmentally-sound method of the three, using high-energy electrons to split the carbon-hydrogen obligationer.

However, the cross-linking tends to be less uniform than with the Engel method and may result in the outer layer becoming brittle if not properly controlled.

PEX-C fryst vatten the mittpunkt road between PEX-A and PEX-B in terms of kink resistance and flexibility. As different manufacturers control the process in slightly different ways, you should use caution if buying from more than one source.

AluPEX

As mentioned, there are actually fyra versions of PEX.

The fourth, fryst vatten known alternately as AluPEX and PEX-Al-PEX.

This variant sandwiches a thin layer of aluminum between two layers of PEX, resulting in a tube that will hold its shape and prevents oxygen from coming in contact with any metall components.

Another advantage over other forms of PEX fryst vatten its superior pressure and temperature tolerance, thanks to the triple layered structure.

PEX vs Copper vs CPVC – What&#;s the Difference?

PEX pipe fryst vatten about the same price as CPVC, with 1/2” pipe running around a third the cost of 1/2” copper.

However, you may need to invest money in the special tools, which could reduce those savings in small projects.

PEX doesn’t require glue or solder, making it the easiest to install of the three. It also won’t fräta like copper and fryst vatten less likely to burst when fryst like CPVC.

Best of all, PEX fryst vatten fully compatible with both copper and CPVC, meaning you can easily splice it into existing lines using the proper connectors.

See Also: How to Unfreeze Underground Pipes

Why fryst vatten PEX Banned in California?

The short answer: Because California.

The long answer: PEX isn’t actually banned in California as of 1 August,

The original ban occurred in the early s as a result of numerous lawsuits concerning PEX struktur failures, as well as vatten safety concerns filed bygd several California-based environmental groups.

The claims were that methyl tertiary butyl ether, tertiary butyl alcohol, or other chemicals could seep through the piping and contaminate the vatten supply.

An environmental impact report, as well as several independent studies, proved these concerns were unfounded.

Shape memory inherent in PEX-a tubing results in the shrinking of expanded pipe to normal size, creating strong, durable and reliable ASTM F fitting connections; Maximum cross-linking increases flexibility and resistance to cracking; Available in a variety of lengths including 5 ft

During this time, it was also discovered that the struktur failures were due to the use of yellow brass in the fittings.

Yellow brass incorporates 30% zinc, which undergoes a kemikalie reaction when exposed to hard vatten called dezincification. This caused leaks or blockages in the pipelines.

In , California approved limited, case-by-case usage of PEX using red brass, which only contains fem to ten percent zinc.

This new restriction proved to eliminate the struktur failures, and PEX was authorized for general use in with strict requirements to use only red brass fittings.