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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 Matco-Norca
    SKU: DUN-0759LF
    Brand: Matco-Norca
    (3)
    $4.55 each
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    $43.30 box of 10
    $4.33 each
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    Wed, Aug 18 – Wed, Aug 25
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    Wed, Aug 18 – Wed, Aug 25
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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 Legend Valve
    SKU: 301-104PNL
    Brand: Legend Valve
    $14.69 each
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    2,716
    Wed, Aug 4
    2,716
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    2,716 Wed, Aug 4
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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 Matco-Norca
    SKU: DUN-1259LF
    Brand: Matco-Norca
    (2)
    $9.29 each
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    $44.45 box of 5
    $8.89 each
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    Wed, Aug 18 – Wed, Aug 25
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    Wed, Aug 18 – Wed, Aug 25
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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 Watts
    SKU: 0009865
    Brand: Watts
    (14)
    $11.66 each
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    $279.84 box of 24
    $11.66 each
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    643
    Wed, Aug 4
    643
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    643 Wed, Aug 4
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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 Watts
    SKU: 0009866
    Brand: Watts
    (14)
    $18.99 each
      Box Up & Save 4%  
    $218.28 box of 12
    $18.19 each
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    74
    Wed, Aug 4
    75
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    74 Wed, Aug 4
    1 Thu, Aug 5
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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 Bluefin
    SKU: DEU200CF
    Brand: Bluefin
    (1)
    $23.59 each
      Box Up & Save 6%  
    $221.90 box of 10
    $22.19 each
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    43
    Wed, Aug 4
    43
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    43 Wed, Aug 4
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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 Zurn
    SKU: 34-DUXLC
    Brand: Zurn
    $7.02 each
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    13
    Wed, Aug 4
    13
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    13 Wed, Aug 4
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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 Bluefin
    SKU: DEN075-300
    Brand: Bluefin
    (1)
    $2.87 each
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    $62.75 box of 25
    $2.51 each
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    306
    Wed, Aug 4
    306
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    306 Wed, Aug 4
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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 Bluefin
    SKU: DEU050CF
    Brand: Bluefin
    $3.53 each
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    $83.00 box of 25
    $3.32 each
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    345
    Wed, Aug 4
    345
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    345 Wed, Aug 4
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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 Legend Valve
    SKU: 301-105PNL
    Brand: Legend Valve
    $20.59 each
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    386
    Wed, Aug 4
    386
    QtyArrives
    386 Wed, Aug 4
    Questions? Call 1-888-757-4774
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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 Bluefin
    SKU: DEN100-400
    Brand: Bluefin
    (1)
    $3.87 each
      Box Up & Save 9%  
    $88.00 box of 25
    $3.52 each
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    927
    Wed, Aug 4
    927
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    927 Wed, Aug 4
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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 Watts
    SKU: 0009875
    Brand: Watts
    (14)
    $21.42 each
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    101
    Wed, Aug 4
    101
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    101 Wed, Aug 4
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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 Bluefin
    SKU: DEN075-250
    Brand: Bluefin
    (1)
    $2.22 each
      Box Up & Save 13%  
    $48.25 box of 25
    $1.93 each
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    883
    Wed, Aug 4
    883
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    883 Wed, Aug 4
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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 Watts
    SKU: 0881427
    Brand: Watts
    $8.39 each
      Box Up & Save 5%  
    $199.75 box of 25
    $7.99 each
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    114
    Wed, Aug 4
    114
    QtyArrives
    114 Wed, Aug 4
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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 Bluefin
    SKU: DEN075-400
    Brand: Bluefin
    (1)
    $2.96 each
      Box Up & Save 12%  
    $64.75 box of 25
    $2.59 each
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    155
    Wed, Aug 4
    155
    QtyArrives
    155 Wed, Aug 4
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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 Matco-Norca
    SKU: DUN-7559LF
    Brand: Matco-Norca
    $4.55 each
      Box Up & Save 5%  
    $43.30 box of 10
    $4.33 each
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    Wed, Aug 18 – Wed, Aug 25
    Arrives
    Wed, Aug 18 – Wed, Aug 25
    Questions? Call 1-888-757-4774 or LiveChat Img Chat Us
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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 Zurn
    SKU: 1-DUXLC
    Brand: Zurn
    (2)
    $11.83 each
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    152
    Wed, Aug 4
    152
    QtyArrives
    152 Wed, Aug 4
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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 Bluefin
    SKU: DEN150-400
    Brand: Bluefin
    (1)
    $5.89 each
      Box Up & Save 8%  
    $134.75 box of 25
    $5.39 each
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    288
    Wed, Aug 4
    288
    QtyArrives
    288 Wed, Aug 4
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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 Watts
    SKU: 0881428
    Brand: Watts
    $12.07 each
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    $287.25 box of 25
    $11.49 each
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    48
    Wed, Aug 4
    48
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    48 Wed, Aug 4
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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 Watts
    SKU: 0881401
    Brand: Watts
    $2.62 each
      Box Up & Save 5%  
    $62.25 box of 25
    $2.49 each
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    111
    Wed, Aug 4
    111
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    111 Wed, Aug 4
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  • Dielectric Union Gasket Kit for 1-1/2" 3001 Series, GB-E Product Image
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    Dielectric Union Gasket Kit for 1-1/2" 3001 Series, GB-E 0881429 Dielectric Union Gasket Kit for 1-1/2" 3001 Series, GB-E
    SKU: 0881429 Watts
    SKU: 0881429
    Brand: Watts
    (1)
    $15.22 each
      Box Up & Save 4%  
    $364.75 box of 25
    $14.59 each
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    60
    Wed, Aug 4
    60
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    60 Wed, Aug 4
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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 Watts
    SKU: 0821931
    Brand: Watts
    $17.63 each
      Box Up & Save 5%  
    $200.28 box of 12
    $16.69 each
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    107
    Wed, Aug 4
    107
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    107 Wed, Aug 4
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  • 2" x 4" Galvanized Steel Dielectric Nipple<br>w/ Pex Insulator Product Image
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    2" x 4" Galvanized Steel Dielectric Nipple w/ Pex Insulator DEN200-400 2" x 4" Galvanized Steel Dielectric Nipple w/ Pex Insulator
    SKU: DEN200-400 Bluefin
    SKU: DEN200-400
    Brand: Bluefin
    $8.29 each
      Box Up & Save 10%  
    $149.80 box of 20
    $7.49 each
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    66
    Wed, Aug 4
    66
    QtyArrives
    66 Wed, Aug 4
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  • 1-1/4" FNPT x Copper Press Dielectric Union, P-571NL (Lead Free) Product Image
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    1-1/4" FNPT x Copper Press Dielectric Union, P-571NL (Lead Free) 301-106PNL 1-1/4" FNPT x Copper Press Dielectric Union, P-571NL (Lead Free)
    SKU: 301-106PNL Legend Valve
    SKU: 301-106PNL
    Brand: Legend Valve
    $27.99 each
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    197
    Wed, Aug 4
    197
    QtyArrives
    197 Wed, Aug 4
    Questions? Call 1-888-757-4774
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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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