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10 BEST PEX Pipe, Fittings & Specialty Tools Choose Right Multilayer 2022

10 BEST PEX Pipe, Fittings & Specialty Tools Choose Right Multilayer 2022

10 BEST PEX Pipe, Fittings & Specialty Tools Choose Right Multilayer 2022

The use of multilayer pipe is growing every day thanks to its five-layer composition (plastic/adhesive/aluminum/adhesive/plastic) that gives it properties that combine the advantages of metal and plastic pipes. It is a tube for universal use, ideal for any plumbing and heating application, both in new construction and rehabilitation. 

Among its innumerable advantages, we can highlight its comfort of use (it is light, flexible, keeps the curves made, and easy to cut), the savings in installation time, and its suitability for exposed installations in which the tube runs. Outside. from the wall.

For its part, the PEX pipe is a polyethylene pipe subjected to a cross-linking process in its molecular structure that improves its performance in terms of temperature resistance, resistance to chemical agents, and lengthening of its useful life. Given its exceptional quality-price ratio, it is especially suitable for plumbing installations in sizeable new construction projects and, in the case of PEX tubes with an anti-oxygen barrier, in underfloor air conditioning installations.

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Advantages of Multiconcept and concept-Pex pipes

At IXOS, we have both types of pipes within the references of our concept brand: Multiconcept (multilayer insulated pipes) and concept-Pex (cross-linked polyethylene pipes).

Concept – Pex cross-linked polyethylene pipes provide the following advantages:

– They resist high pressures at high temperatures (at 95ºC, their resistance is 6 bars of pressure), more than enough for any plumbing and heating installation.

– Ease of transport and handling thanks to its lightness and flexibility, the latter characteristic that saves joints and reduces installation times.

– They prevent bursts due to freezing, thanks to their flexibility.

– Low coefficient of thermal conductivity (0.38 W/mºC), which allows for energy savings by reducing heat losses. This low thermal conductivity also prevents condensation.

– They can be cold bent and curved easily and without the need to use particular tools, which saves joints and installation time.

– Resistance to all types of corrosion, since due to their composition, they are not vulnerable to most chemical agents, such as, for example, acids, bases, antifreeze, etc.

– As they do not conduct electricity, concept-PEX pipes do not produce any galvanic corrosion.

– Great behavior against aging, being able to exceed 50 years of service even under conditions of pressure and high temperatures. In addition, thanks to their configuration, they ensure the absence of limescale and other deposits, maintaining the initial flow for life.

The insulating condition of polyethylene provides low thermal conductivity, avoids condensation, and allows energy savings by reducing heat losses.

10 BEST PEX Pipe, Fittings & Specialty Tools Choose Right Multilayer 2022

Multiconcept multilayer pipes have the following added advantages over concept-PEX lines, thanks to their central aluminum layer:

-They are straightforward to bend and maintain the given shape. Its radius of curvature is 5 times the outer diameter when bending manually and 4 times when bending with the bending spring.

– They are suitable for exposed installations, standard in rehabilitation works.

– Their aluminum layer makes them impervious to oxygen, making them especially suitable for heating installations, both by radiators and underfloor heating.

– Increases its resistance to high pressures, resisting 10 bars of pressure at 95ºC for more than 50 years.

Press accessories for both systems

The Multiconcept and concept-Pex systems add the properties of the corresponding press-fitting type to the multilayer or Pex pipes. The accessories of the Multiconcept system are compatible with the pressing profiles U, RF, TH, and H, while those of the concept-Pex system are compatible with the profiles type RF, U, and H.

The pressing accessories of both systems share the following advantages:

– Greater resistance to tensile stress. The geometry of the bush allows the positioning of the clamping jaw concerning the shape of the accessory, which significantly improves its resistance to tensile stress.

– They comply with the most demanding regulations, guaranteeing tightness and sanitary qualities.

– Its brass alloy contains a low lead content, complying with the most demanding European regulations regarding materials in contact with drinking water.

– The welded stainless steel bushings give them a lower hardness so that the subsequent tightening can be carried out with less effort from the tool.

– Time savings, since both systems do not require any waiting once the connection has been made, which allows the installation to come into service immediately.

To these advantages, the Multiconcept system pressing accessories to add a plastic ring to hold the cap in place that acts as an anti-corrosion chamber by preventing contact between the three metals of the plan (stainless steel, brass, and aluminum of the multilayer tube, eliminating the possibility of electrolytic corrosion.

And, for its part, the pressing accessories of the concept-Pex system incorporate a safety/self-locking locking system, which facilitates the tightening of the bushing, preventing the addition from coming out of the tube during the pressing operation.

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Union by pressing

The most used connection technique to connect multilayer and Pex pipes worldwide is pressing due to its speed, comfort, and compatibility, even for metal pipes. There are two types of pressing tools, manual and automatic, powered by a battery or connection to the electrical network. 

For the professional installer, it is evident that the most suitable pressing tools are the battery-powered ones, since they make the work faster and more comfortable, avoid faulty pressing and allow total freedom of movement by eliminating power cables—network connection

Knowing all these advantages provided by battery-powered pressing tools, and based on the fact that one of IXOS’s missions is to offer professional installers the best solutions so that they can be efficient and agile in their work

we have launched, as we had advanced, the “IXOS helps you press” promotion, through which you can get a free press-fitting tool (with an annual review service) for the purchase of products from the Multiconcept or concept-Pex systems.

10 BEST PEX Pipe, Fittings & Specialty Tools Choose Right Multilayer 2022

This promotion includes a case with the MAP115 ML concept mini tool, two batteries, charger, and clamps with diameters 16, 20, and 25 Profile “U.” Among the main features of the concept mini MAP115 ML pressing tool are its small size, lightness, and easy handling thanks to its 36 centimeters in length, 1.6 kilos and 3-4 seconds of pressing time.

Despite its size, the MAP115 ML concept mini-press is solid and efficient, with a linear force of 15 kN and double surface treatment on the jaws. In addition, it has a high-capacity battery (10.8 V / 1.5 Ah with charge indicator) with a charging time of fewer than 40 minutes, and safety elements such as LEDs to illuminate the work area, improving the grip with new materials and an anti-fall safety harness ring.

If you want to know more details about this promotion, we invite you to stop by one of our centers or contact your commercial advisor. You already know that you can find us at:

Providing an excellent option for plumbing, radiant and hydronic systems in residential and commercial plumbing applications, Crosslinked Polyethylene (PEX) tubing is widely used in America, Europe, and Australia. Each area has its standard on PEX installation, which can be found at. 

After reading this essay, I hope you can help choose the best type of PEX for your next home or industrial project.

PEX pipe manufacturing process

The PEX-A & PEX-B & PEX-C are all processed by crosslinking, a chemical reaction between the polyethylene polymer chains.

Crosslinking causes HDPE to become stronger and resistant to cold temperature cracking or impact brittleness while retaining flexibility.

The three methods of crosslinking HDPE are:

  1. PEX-A: peroxide method (Engels). During the manufacturing process, free radicals are created when the HDPE polymer melts, and crosslinks between molecules occur at temperatures exceeding the polymer’s decomposition temperature.
  2. PEX-B: silane method (moisture cure). After the extrusion process is crosslinking between HDPE molecules using a catalyst and exposing PEX pipes to hot water. This type of PEX is the most.
  3. PEX-C : radiation method (electron irradiation). The crosslinking of the molecules is done after the extrusion process by exposing the pipe to a beam of electron radiation. The emitted radiation can break the bonds between the polymer molecules and start the crosslinking process.
10 BEST PEX Pipe, Fittings & Specialty Tools Choose Right Multilayer 2022

Pros & cons of PEX-A, PEX-B, PEX-C tubing

PEX-A

  • The most flexible and highest quality tube on the market makes it the most expensive of all those 3 types.
  • Doubloons in the pipe could be repaired simply by heating the line with a heat gun, for it is more elastic than PEX-B.
  • The wall thickness of PEX-A systems is typically greater than PEX B because it has a lower burst resistance and requires greater consistency to stand up to the same operating pressures.

As a result of the thicker wall of the PEX-A pipe, it will generally have a lower SDR and, therefore, a lower flow rate.

  • The pipe expands around the fitting instead of the fitting inside the tube. This can make accessories more challenging to install if you work in cold conditions.

Tips: this PEX is slightly more flexible than the other types at temperatures above 60oF. However, PEX-B tends to be more flexible below this temperature and offers an advantage during installation in colder climates.

Several industry participants state that the PEX-a method produces more flexible tubing than other methods.

PEX-B

  • The cheapest of those 3 types.
  • Expansion fittings could not work with PEX-B.
  • The flow rate is higher than PEX-A as it is often rated for higher pressure than PEX-A.
  • The most commonly used PEX in North America, including compression, PUSH FIT, and copper crimp rings. It is more affordable because it is more rigid.
  • The higher crystallinity molecular structure results in the PEX B product having a higher surface hardness, better scratch resistance, higher thermal stability, higher stiffness, a more rigid body, better resistance to chlorine solutions, and higher strength.
  • Although all types of PEX are vulnerable to high chlorine counts, it performs better in chlorine tests than other types.
  • The pipe can degrade if exposed to high levels of the chemical.
  • The kinks in the PEX-B must be cut and repaired with an accessory.
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PEX-C

  • Similar in price to PEX-B, identical in quality to PEX-A, but not good enough to be used with complete flow connections.
  • The pipe is more flexible than PEX-B, although it may feel a bit more “plastic-like” than other types of PEX.
  • The more environmentally friendly manufacturing process may become a more popular choice in the future.
  • The crosslinking process for this type creates the fewest bonds, making it closer to regular polyethylene plastic tubing as opposed to true PEX A and B PEX tubing.

Comparison of main attributes

Property PEX-A PEX-B PEX-C

flexibility Better flexibility than PEX-B Stiffer to work with and bend than the other 2 It varies

resistance to bullfighting Good Poor

(More vulnerable to being bent than PEX-A or PEX-C) Fair

(Most susceptible to being twisted)

Kink Repairability Excellent It’s not possible Decreases after heating to transparency

Force Meets ASTM standard Meets ASTM standard Meets ASTM standard

homogeneity Not very good Good Good

thermal memory Good Poor Poor

Barrier Property Complies with DIN 4726 Complies with DIN 4726 Complies with DIN 4726

thermostability Better than ASTM requirements Better than ASTM requirements Better than ASTM requirements

The memory effect of being coiled Just-better than PEX-B Poor Just-better than PEX-B

Minimum bending radius Good-better than PEX-B Poor – the worst of all types of PEX It varies

density 0.938-highest 0.941-highest 0.941-highest

Is PEX pipe good for plumbing?

All this makes PEX an excellent piping material for hot and cold water systems, especially since it is flexible and well adapted for temperatures below freezing all the way up to 200 degrees Fahrenheit. PEX is easy for plumbers to install and has fewer joints, bringing your costs down.

What are the disadvantages of PEX?

PEX Plumbing Disadvantages

  • PEX may leach BPA and other toxic chemicals. …
  • PEX is extremely sensitive to UV light. …
  • PEX can be damaged by chemicals and pests. …
  • PEX can’t be installed in high heat areas. …
  • PEX is semi-permeable, which means liquid can enter the pipe.

What is PEX pipe used for?

What Are PEX Pipes? PEX is short for cross-linked polyethylene. PEX pipes, which are used for radiant heating and cooling systems, water piping, and insulation for electrical cables. PEX can be bent, twisted, or crushed, to some degree, and it will return to its original shape.

How long does PEX pipe last?

Generally, PEX pipes last for 25 to 40 years before they need to be replaced. By comparison, copper pipes last for around 50 to 70 years.

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