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  • 1/2" Oxygen Barrier PEX Tubing (300 ft Coil) Product Image
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    1/2" Oxygen Barrier PEX Tubing (300 ft Coil) T050-300-OXY 1/2" Oxygen Barrier PEX Tubing (300 ft Coil)
    SKU: T050-300-OXY
    Brand: Bluefin
    (190)
    $77.99 each
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    1/2" Oxygen Barrier PEX Tubing (1,000 ft Coil) T050-1000-OXY 1/2" Oxygen Barrier PEX Tubing (1,000 ft Coil)
    SKU: T050-1000-OXY
    Brand: Bluefin
    (190)
    $229.99 each
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  • 3/4" Oxygen Barrier PEX Tubing (300 ft Coil) Product Image
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    3/4" Oxygen Barrier PEX Tubing (300 ft Coil) T075-300-OXY 3/4" Oxygen Barrier PEX Tubing (300 ft Coil)
    SKU: T075-300-OXY
    Brand: Bluefin
    (190)
    $132.99 each
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  • 3/4" hePEX<br>(100 ft. coil) Product Image
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    3/4" hePEX (100 ft. coil) A1140750 3/4" hePEX (100 ft. coil)
    SKU: A1140750
    Brand: Uponor (Wirsbo)
    (122)
    $109.99 each
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    1/2" hePEX (300 ft. coil) A1250500 1/2" hePEX (300 ft. coil)
    SKU: A1250500
    Brand: Uponor (Wirsbo)
    (122)
    $204.99 each
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  • 1/2" hePEX<br>(100 ft. coil) Product Image
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    1/2" hePEX (100 ft. coil) A1140500 1/2" hePEX (100 ft. coil)
    SKU: A1140500
    Brand: Uponor (Wirsbo)
    (122)
    $71.69 each
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  • 1" Oxygen Barrier PEX Tubing (300 ft Coil) Product Image
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    1" Oxygen Barrier PEX Tubing (300 ft Coil) T100-300-OXY 1" Oxygen Barrier PEX Tubing (300 ft Coil)
    SKU: T100-300-OXY
    Brand: Bluefin
    (190)
    $209.99 each
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  • 1/2" hePEX<br>(1000 ft. coil) Product Image
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    1/2" hePEX (1000 ft. coil) A1220500 1/2" hePEX (1000 ft. coil)
    SKU: A1220500
    Brand: Uponor (Wirsbo)
    (122)
    $714.99 each
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  • 1/2" PEX-AL-PEX Tubing <br>(300 ft Coil) Product Image
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    1/2" PEX-AL-PEX Tubing (300 ft Coil) T050-300-PAP 1/2" PEX-AL-PEX Tubing (300 ft Coil)
    SKU: T050-300-PAP
    Brand: Bluefin
    (26)
    $132.99 each
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  • 1" hePEX<br>(100 ft. coil) Product Image
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    1" hePEX (100 ft. coil) A1141000 1" hePEX (100 ft. coil)
    SKU: A1141000
    Brand: Uponor (Wirsbo)
    (122)
    $194.99 each
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  • 3/4" hePEX<br>(300 ft. coil) Product Image
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    3/4" hePEX (300 ft. coil) A1250750 3/4" hePEX (300 ft. coil)
    SKU: A1250750
    Brand: Uponor (Wirsbo)
    (122)
    $334.99 each
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  • 5/16" hePEX<br>(250 ft. coil) Product Image
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    5/16" hePEX (250 ft. coil) A1180313 5/16" hePEX (250 ft. coil)
    SKU: A1180313
    Brand: Uponor (Wirsbo)
    (122)
    $179.99 each
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  • 1/2" hePEX<br>(500 ft. coil) Product Image
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    1/2" hePEX (500 ft. coil) A1260500 1/2" hePEX (500 ft. coil)
    SKU: A1260500
    Brand: Uponor (Wirsbo)
    (122)
    $349.99 each
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  • 1/2" PEX-AL-PEX Tubing (1,000 ft Coil) Product Image
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    1/2" PEX-AL-PEX Tubing (1,000 ft Coil) T050-1000-PAP 1/2" PEX-AL-PEX Tubing (1,000 ft Coil)
    SKU: T050-1000-PAP
    Brand: Bluefin
    (26)
    $407.99 each
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  • 5/8" Oxygen Barrier PEX Tubing (400 ft Coil) Product Image
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    5/8" Oxygen Barrier PEX Tubing (400 ft Coil) T058-400-OXY 5/8" Oxygen Barrier PEX Tubing (400 ft Coil)
    SKU: T058-400-OXY
    Brand: Bluefin
    (190)
    $141.99 each
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  • 5/8" hePEX<br>(100 ft. coil) Product Image
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    5/8" hePEX (100 ft. coil) A1140625 5/8" hePEX (100 ft. coil)
    SKU: A1140625
    Brand: Uponor (Wirsbo)
    (122)
    $93.59 each
    26
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  • 5/8" Oxygen Barrier PEX Tubing (1,000 ft Coil) Product Image
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    5/8" Oxygen Barrier PEX Tubing (1,000 ft Coil) T058-1000-OXY 5/8" Oxygen Barrier PEX Tubing (1,000 ft Coil)
    SKU: T058-1000-OXY
    Brand: Bluefin
    (190)
    $354.99 each
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  • 3/8" hePEX<br>(100 ft. coil) Product Image
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    3/8" hePEX (100 ft. coil) A1140375 3/8" hePEX (100 ft. coil)
    SKU: A1140375
    Brand: Uponor (Wirsbo)
    (122)
    $76.99 each
    23
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  • 3/4" FostaPEX<br>PEX-AL-PEX Tubing<br>(150 ft. coil) Product Image
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    3/4" FostaPEX PEX-AL-PEX Tubing (150 ft. coil) 35040 3/4" FostaPEX PEX-AL-PEX Tubing (150 ft. coil)
    SKU: 35040
    Brand: Viega
    (15)
    $204.99 each
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  • 3/4" PEX-AL-PEX Tubing <br>(300 ft Coil) Product Image
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    3/4" PEX-AL-PEX Tubing (300 ft Coil) T075-300-PAP 3/4" PEX-AL-PEX Tubing (300 ft Coil)
    SKU: T075-300-PAP
    Brand: Bluefin
    (26)
    $261.99 each
    48
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  • 3/4" Pre-Insulated Wirsbo hePEX w/ 1/2" Insulation, 100 ft coil Product Image
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    3/4" Pre-Insulated Wirsbo hePEX w/ 1/2" Insulation, 100 ft coil A6140750 3/4" Pre-Insulated Wirsbo hePEX w/ 1/2" Insulation, 100 ft coil
    SKU: A6140750
    Brand: Uponor (Wirsbo)
    $299.99 each
    63
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  • 1/2" ViegaPEX Barrier Tubing (300 ft) Product Image
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    1/2" ViegaPEX Barrier Tubing (300 ft) 11425 1/2" ViegaPEX Barrier Tubing (300 ft)
    SKU: 11425
    Brand: Viega
    (2)
    $171.99 each
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  • 5/8" hePEX<br>(300 ft. coil) Product Image
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    5/8" hePEX (300 ft. coil) A1250625 5/8" hePEX (300 ft. coil)
    SKU: A1250625
    Brand: Uponor (Wirsbo)
    (122)
    $265.99 each
    9
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  • 1/2" FostaPEX<br>PEX-AL-PEX Tubing<br>(150 ft. coil) Product Image
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    1/2" FostaPEX PEX-AL-PEX Tubing (150 ft. coil) 35020 1/2" FostaPEX PEX-AL-PEX Tubing (150 ft. coil)
    SKU: 35020
    Brand: Viega
    (15)
    $138.99 each
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FAQs, Manuals & Videos

Resources

Videos

FAQs

  • If by standard you mean a closed system, with cast iron pumps, valves and a boiler, then oxygen barrier PEX is the right tubing for you. Brands of oxygen barrier PEX include hePEX, MrPEX, HydroPEX, and Viega PEX.
  • Wirsbo hePEX and MrPEX tubing are both PEX-a products. PEX-a uses is made using the best manufacturing process (the Engel method) and produces the strongest, most flexible tubing. PEX-a tubing is also the only tubing that can be used with expander style fittings. hePEX is more expensive than ThermaPEX because it is made by Wirsbo (Uponor), the leading brand name, who have been the world leader in PEX for decades. The other brands of PEX, HydroPEX and Viega PEX, are comparable and can be used in standard radiant applications. All of these brands carry at least a 20 year warranty.
  • There are many different ways to install PEX tubing in a radiant heat system. The most popular are in a slab, in joist bays with aluminum panels or PEX clips, or in a Quik Trak above subfloor system. The most efficient and least expensive way to install PEX is an in-slab application; but unfortunately this option is not always available.
  • 1/2" is by far the most common size of tubing used in radiant heat. 5/8", 3/8", and 3/4" follow behind. The size of PEX tubing used does not change the amount of heat that is produced, but it does change the maximum loop length that can be run.
  • The spacing of PEX tubing in a radiant heat system determines how much heat a given area will produce. This spacing or distance between two PEX lines is also referred to as the on-center distance. The closer that tubing is spaced, the higher the BTU output will be, given that water temperature is held constant. When laying out your tubing you must keep this in mind. For basements and shops, 12" spacing will work. For living areas, tubing can be spaced roughly 9" apart. For a bathroom, tubing can be 6-7" apart. This spacing assumes a moderate climate; if you are located in a warm climate tubing can be spaced farther apart and if you are located in an extremely cold climate tubing should be spaced closer together. Along exposed walls, tubing should be spaced 6" apart for the first 2-3' to combat the heat loss.
  • For baseboard and other hydronic heating applications you will want to use either oxygen barrier PEX or PEX-AL-PEX tubing (the aluminum core acts an oxygen barrier). In most applications oxygen barrier PEX (such as MrPEX or hePEX) will be used. However, PEX-AL-PEX, because of its ability to hold its shape, is often used. Both of these products are able to withstand temperatures up to 200° F. The oxygen barrier will prevent rusting of cast iron components in your system.
  • PEX-AL-PEX tubing is used in some slab applications, Warmboard applications, and in some hydronic heating jobs. The main advantage of using PEX-AL-PEX is its ability to hold its shape when bent or pushed a certain way. This can be great in tight situations such as in the boiler room and for baseboard. However, for in slab and joist applications this tubing can be difficult to work with. PEX-AL-PEX can is great for high temperature systems as well because it has a very low expansion rate of .156" per 100 feet for a 10° temperature rise.
  • No, you cannot use PEX on a solar system because the water temperatures in a solar system can reach 325°, which is too high for PEX.

Articles

  • PEX (cross-linked polyethylene) tubing is a flexible pipe used in radiant heat and hydronic heating systems. Radiant heat is growing in popularity, and is now the preferred heating system in new homes. Radiant heat provides more comfort throughout the home than standard baseboard heat. PEX tubing is installed beneath the floor and heats the home from the ground up. As the floor becomes warm, the room is heated evenly and efficiently. Radiant heat is silent, producing no creaking, banging, or humming sounds that are commonly heard in other heating systems. Radiant heat allows you to turn the thermostat a few degrees lower than you normally would while providing the same warmth. This cuts energy bills and saves you money.

    PEX tubing is approved by all major plumbing/heating codes and bends easily, making it more versatile than standard copper tubing. Manufacturers of PEX generally provide a 20-25 year warranty, but PEX is known to have a much longer lifespan. 1/2" PEX is the most common size used in radiant heat, but 3/8", 5/8", and 3/4" are also available.

    Types of Radiant Heat Tubing

    Oxygen Barrier PEX
    The "barrier" referred to in PEX tubing is an oxygen barrier. The oxygen barrier assures that no oxygen will enter the heating system. A standard radiant heat system is a closed system that includes cast iron pumps, valves, and a boiler. This type of system requires an oxygen barrier PEX to prevent the cast iron components from rusting over time. If oxygen barrier tubing is not used, components in the system should be brass, bronze, or stainless steel which are more expensive. We offer several types of oxygen barrier PEX including Uponor (Wirsbo) hePEX, ThermaPEX , Rifeng, and Viega PEX.

    PEX-AL-PEX
    PEX-AL-PEX (PEX-Aluminum-PEX) is a three-layer oxygen barrier PEX Tubing. The main benefit of PEX-AL-PEX is that it maintains its shape when bent. While traditional PEX is flexible, it returns to its original shape when left unsecure. Once bent, PEX-AL-PEX will hold that shape until bent again. PEX-AL-PEX has less expansion capacity than standard PEX. PEX-AL-PEX is generally used in outdoor heating applications, warmboard systems, and high temperature systems such as baseboard or fan coils. We carry several types of PEX-AL-PEX including Rifeng PEX-AL-PEX, Uponor (Wirsbo) Multicor, and Viega FostaPEX.

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