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Dielectric Unions & Nipples

Dielectric Unions & Nipples

  • 3/4" Sweat x Female Dielectric Union <br>(Lead Free) Product Image
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    3/4" Sweat x Female Dielectric Union (Lead Free) DUN-0759LF 3/4" Sweat x Female Dielectric Union (Lead Free)
    SKU: DUN-0759LF
    Brand: Matco-Norca
    (3)
    $4.55 each
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    $43.30 box of 10
    $4.33 each
    Thu, Jun 10 – Thu, Jun 17
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    Thu, Jun 10 – Thu, Jun 17
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  • 3/4" FNPT x Copper Press Dielectric Union, P-571NL (Lead Free) Product Image
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    3/4" FNPT x Copper Press Dielectric Union, P-571NL (Lead Free) 301-104PNL 3/4" FNPT x Copper Press Dielectric Union, P-571NL (Lead Free)
    SKU: 301-104PNL
    Brand: Legend Valve
    $14.69 each
    643
    Wed, May 26
    643
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    643 Wed, May 26
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  • 1" Sweat x Female Dielectric Union<br>(Lead Free) Product Image
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    1" Sweat x Female Dielectric Union (Lead Free) DEU100CF 1" Sweat x Female Dielectric Union (Lead Free)
    SKU: DEU100CF
    Brand: Bluefin
    (1)
    $7.79 each
      Box Up & Save 10%  
    $174.75 box of 25
    $6.99 each
    247
    Wed, May 26
    247
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    247 Wed, May 26
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  • 1-1/2" Sweat x Female Dielectric Union (Lead Free) Product Image
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    1-1/2" Sweat x Female Dielectric Union (Lead Free) DEU150CF 1-1/2" Sweat x Female Dielectric Union (Lead Free)
    SKU: DEU150CF
    Brand: Bluefin
    $13.79 each
      Box Up & Save 6%  
    $129.90 box of 10
    $12.99 each
    62
    Wed, May 26
    62
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    62 Wed, May 26
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  • 1-1/4" Sweat x Female Dielectric Union<br>(Lead Free) Product Image
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    1-1/4" Sweat x Female Dielectric Union (Lead Free) DUN-1259LF 1-1/4" Sweat x Female Dielectric Union (Lead Free)
    SKU: DUN-1259LF
    Brand: Matco-Norca
    (2)
    $9.29 each
      Box Up & Save 4%  
    $44.45 box of 5
    $8.89 each
    Thu, Jun 10 – Thu, Jun 17
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    Thu, Jun 10 – Thu, Jun 17
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  • 3/4" LF3001A CxF Dielectric Union<br>(Lead Free) Product Image
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    3/4" LF3001A CxF Dielectric Union (Lead Free) 0009865 3/4" LF3001A CxF Dielectric Union (Lead Free)
    SKU: 0009865
    Brand: Watts
    (14)
    $11.21 each
      Box Up & Save 2%  
    $264.00 box of 24
    $11.00 each
    526
    Wed, May 26
    526
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    526 Wed, May 26
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  • 3/4" Male x Sweat Dielectric Union<br>(Lead Free) Product Image
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    3/4" Male x Sweat Dielectric Union (Lead Free) DEU075CM 3/4" Male x Sweat Dielectric Union (Lead Free)
    SKU: DEU075CM
    Brand: Bluefin
    (1)
    $6.09 each
      Box Up & Save 7%  
    $142.25 box of 25
    $5.69 each
    47
    Wed, May 26
    47
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    47 Wed, May 26
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  • 1" LF3001A CxF<br>Dielectric Union<br>(Lead Free) Product Image
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    1" LF3001A CxF Dielectric Union (Lead Free) 0009866 1" LF3001A CxF Dielectric Union (Lead Free)
    SKU: 0009866
    Brand: Watts
    (14)
    $18.99 each
      Box Up & Save 4%  
    $218.28 box of 12
    $18.19 each
    102
    Wed, May 26
    102
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    102 Wed, May 26
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  • 2" Sweat x Female Dielectric Union<br>(Lead Free) Product Image
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    2" Sweat x Female Dielectric Union (Lead Free) DEU200CF 2" Sweat x Female Dielectric Union (Lead Free)
    SKU: DEU200CF
    Brand: Bluefin
    (1)
    $23.59 each
      Box Up & Save 6%  
    $221.90 box of 10
    $22.19 each
    163
    Wed, May 26
    163
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    163 Wed, May 26
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  • 3/4" CxF Dielectric Union<br>(Lead Free) Product Image
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    3/4" CxF Dielectric Union (Lead Free) 34-DUXLC 3/4" CxF Dielectric Union (Lead Free)
    SKU: 34-DUXLC
    Brand: Zurn
    $7.02 each
    23
    Wed, May 26
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    23 Wed, May 26
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  • 3/4" x 3" Galvanized Steel Dielectric Nipple<br>w/ Pex Insulator Product Image
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    3/4" x 3" Galvanized Steel Dielectric Nipple w/ Pex Insulator DEN075-300 3/4" x 3" Galvanized Steel Dielectric Nipple w/ Pex Insulator
    SKU: DEN075-300
    Brand: Bluefin
    (1)
    $2.87 each
      Box Up & Save 13%  
    $62.75 box of 25
    $2.51 each
    551
    Wed, May 26
    551
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    551 Wed, May 26
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  • 1/2" Sweat x Female Dielectric Union <br>(Lead Free) Product Image
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    1/2" Sweat x Female Dielectric Union (Lead Free) DEU050CF 1/2" Sweat x Female Dielectric Union (Lead Free)
    SKU: DEU050CF
    Brand: Bluefin
    $3.53 each
      Box Up & Save 6%  
    $83.00 box of 25
    $3.32 each
    488
    Wed, May 26
    488
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    488 Wed, May 26
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  • 1" x 4" Galvanized Steel Dielectric Nipple<br>w/ Pex Insulator Product Image
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    1" x 4" Galvanized Steel Dielectric Nipple w/ Pex Insulator DEN100-400 1" x 4" Galvanized Steel Dielectric Nipple w/ Pex Insulator
    SKU: DEN100-400
    Brand: Bluefin
    (1)
    $3.87 each
      Box Up & Save 9%  
    $88.00 box of 25
    $3.52 each
    1,001
    Wed, May 26
    1,001
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    1,001 Wed, May 26
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  • 1" FNPT x Copper Press Dielectric Union, P-571NL (Lead Free) Product Image
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    1" FNPT x Copper Press Dielectric Union, P-571NL (Lead Free) 301-105PNL 1" FNPT x Copper Press Dielectric Union, P-571NL (Lead Free)
    SKU: 301-105PNL
    Brand: Legend Valve
    $20.59 each
    127
    Wed, May 26
    127
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    127 Wed, May 26
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  • 3/4" 3003 FxF<br>Dielectric Union<br>(Lead Free) Product Image
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    3/4" 3003 FxF Dielectric Union (Lead Free) 0009875 3/4" 3003 FxF Dielectric Union (Lead Free)
    SKU: 0009875
    Brand: Watts
    (14)
    $21.42 each
    31
    Wed, May 26
    31
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    31 Wed, May 26
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  • 3/4" x 2-1/2" Galvanized Steel Dielectric Nipple<br>w/ Pex Insulator Product Image
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    3/4" x 2-1/2" Galvanized Steel Dielectric Nipple w/ Pex Insulator DEN075-250 3/4" x 2-1/2" Galvanized Steel Dielectric Nipple w/ Pex Insulator
    SKU: DEN075-250
    Brand: Bluefin
    (1)
    $2.22 each
      Box Up & Save 13%  
    $48.25 box of 25
    $1.93 each
    1,098
    Wed, May 26
    1,098
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    1,098 Wed, May 26
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  • 1" GB-C EPDM Hi-Temp Dielectric Gasket Kit Product Image
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    1" GB-C EPDM Hi-Temp Dielectric Gasket Kit 0881427 1" GB-C EPDM Hi-Temp Dielectric Gasket Kit
    SKU: 0881427
    Brand: Watts
    $8.39 each
      Box Up & Save 5%  
    $199.75 box of 25
    $7.99 each
    121
    Wed, May 26
    121
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    121 Wed, May 26
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  • 3/4" x 4" Galvanized Steel Dielectric Nipple<br>w/ Pex Insulator Product Image
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    3/4" x 4" Galvanized Steel Dielectric Nipple w/ Pex Insulator DEN075-400 3/4" x 4" Galvanized Steel Dielectric Nipple w/ Pex Insulator
    SKU: DEN075-400
    Brand: Bluefin
    (1)
    $2.96 each
      Box Up & Save 12%  
    $64.75 box of 25
    $2.59 each
    200
    Wed, May 26
    200
    QtyArrives
    200 Wed, May 26
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  • 3/4" FIP x 1/2" Sweat Dielectric Union<br>(Lead Free) Product Image
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    3/4" FIP x 1/2" Sweat Dielectric Union (Lead Free) DUN-7559LF 3/4" FIP x 1/2" Sweat Dielectric Union (Lead Free)
    SKU: DUN-7559LF
    Brand: Matco-Norca
    $4.55 each
      Box Up & Save 5%  
    $43.30 box of 10
    $4.33 each
    Thu, Jun 10 – Thu, Jun 17
    Arrives
    Thu, Jun 10 – Thu, Jun 17
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  • 1-1/2" x 4" Galvanized Steel Dielectric Nipple<br>w/ Pex Insulator Product Image
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    1-1/2" x 4" Galvanized Steel Dielectric Nipple w/ Pex Insulator DEN150-400 1-1/2" x 4" Galvanized Steel Dielectric Nipple w/ Pex Insulator
    SKU: DEN150-400
    Brand: Bluefin
    (1)
    $5.89 each
      Box Up & Save 8%  
    $134.75 box of 25
    $5.39 each
    344
    Wed, May 26
    344
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    344 Wed, May 26
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  • 1" CxF Dielectric Union<br>(Lead Free) Product Image
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    1" CxF Dielectric Union (Lead Free) 1-DUXLC 1" CxF Dielectric Union (Lead Free)
    SKU: 1-DUXLC
    Brand: Zurn
    (1)
    $10.67 each
    151
    Wed, May 26
    151
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    151 Wed, May 26
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  • 1-1/4" GB-D EPDM Hi Temp Dielectric Gasket (Set of 2) Product Image
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    1-1/4" GB-D EPDM Hi Temp Dielectric Gasket (Set of 2) 0881428 1-1/4" GB-D EPDM Hi Temp Dielectric Gasket (Set of 2)
    SKU: 0881428
    Brand: Watts
    $12.07 each
      Box Up & Save 5%  
    $287.25 box of 25
    $11.49 each
    63
    Wed, May 26
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    63 Wed, May 26
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  • 1/2", 3/4" GA-B Buna Dielectric Gasket Kit (2 Gaskets Per Kit) Product Image
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    1/2", 3/4" GA-B Buna Dielectric Gasket Kit (2 Gaskets Per Kit) 0881401 1/2", 3/4" GA-B Buna Dielectric Gasket Kit (2 Gaskets Per Kit)
    SKU: 0881401
    Brand: Watts
    $2.62 each
      Box Up & Save 5%  
    $62.25 box of 25
    $2.49 each
    79
    Wed, May 26
    79
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    79 Wed, May 26
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  • 3/4" LF3004 FxF <br>Dielectric Union<br>(Lead Free) Product Image
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    3/4" LF3004 FxF Dielectric Union (Lead Free) 0821931 3/4" LF3004 FxF Dielectric Union (Lead Free)
    SKU: 0821931
    Brand: Watts
    $17.63 each
      Box Up & Save 5%  
    $200.28 box of 12
    $16.69 each
    56
    Wed, May 26
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    56 Wed, May 26
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FAQs, Manuals & Videos

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  • Applications
    A dielectric union is utilized in a plumbing system to make a connection between two pipes of dissimilar metal (such as copper and galvanized Steel). The installation of a dielectric union to separate the two dissimilar metals will prevent corrosion that would otherwise occur over time. They are used in many common residential and commercial applications including: hot water storage tanks, water and air conditioners, and processing tanks and are commonly found in steam, gas, and water piping systems.

    How does a Dielectric Union prevent corrosion?
    Generally all tap water is slightly acidic or basic. When tap water flows through two pipes of dissimilar metal (such as Copper and Galvanized Steel), an electric current is created. The chemical reaction created by the electric current will ultimately erode one of the metals, while simultaneously forming a buildup of new material on the second metal. This buildup of new material typically consists of substance from the eroded metal, and the acid produced during the chemical process.

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