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Dielectric Unions & Nipples

Dielectric Unions & Nipples

  • 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
    (1)
    $16.79 each
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    1,401
    Tue, Nov 2
    1,401
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    1,401 Tue, Nov 2
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  • 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)
    $5.79 each
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    $55.10 box of 10
    $5.51 each
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    Mon, Nov 15 – Mon, Nov 22
    Arrives
    Mon, Nov 15 – Mon, Nov 22
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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) DUN-1009LF 1" Sweat x Female Dielectric Union (Lead Free)
    SKU: DUN-1009LF Matco-Norca
    SKU: DUN-1009LF
    Brand: Matco-Norca
    (1)
    $9.89 each
      Box Up & Save 4%  
    $95.10 box of 10
    $9.51 each
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    Mon, Nov 15 – Mon, Nov 22
    Arrives
    Mon, Nov 15 – Mon, Nov 22
    Questions? Call 1-888-757-4774 or LiveChat Img Chat Us
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  • 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) DEU075CF 3/4" Sweat x Female Dielectric Union (Lead Free)
    SKU: DEU075CF Bluefin
    SKU: DEU075CF
    Brand: Bluefin
    (3)
    $4.44 each
      Box Up & Save 6%  
    $104.50 box of 25
    $4.18 each
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    8
    Tue, Nov 2
    8
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    8 Tue, Nov 2
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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
    (15)
    $13.06 each
      Box Up  
    $313.44 box of 24
    $13.06 each
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    729
    Tue, Nov 2
    729
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    729 Tue, Nov 2
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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
    $13.89 each
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    687
    Tue, Nov 2
    687
    QtyArrives
    687 Tue, Nov 2
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  • 1-1/2" Sweat x Female Dielectric Union w/ EPDM Seat (Lead Free) Product Image
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    1-1/2" Sweat x Female Dielectric Union w/ EPDM Seat (Lead Free) DUN-1509LF 1-1/2" Sweat x Female Dielectric Union w/ EPDM Seat (Lead Free)
    SKU: DUN-1509LF Matco-Norca
    SKU: DUN-1509LF
    Brand: Matco-Norca
    $17.69 each
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    $68.20 box of 4
    $17.05 each
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    Mon, Nov 15 – Mon, Nov 22
    Arrives
    Mon, Nov 15 – Mon, Nov 22
    Questions? Call 1-888-757-4774 or LiveChat Img Chat Us
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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
    (15)
    $19.99 each
      Box Up & Save 5%  
    $227.88 box of 12
    $18.99 each
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    39
    Tue, Nov 2
    39
    QtyArrives
    39 Tue, Nov 2
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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) DUN-759MLF 3/4" Male x Sweat Dielectric Union (Lead Free)
    SKU: DUN-759MLF Matco-Norca
    SKU: DUN-759MLF
    Brand: Matco-Norca
    (1)
    $6.89 each
      Box Up & Save 3%  
    $66.70 box of 10
    $6.67 each
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    Mon, Nov 15 – Mon, Nov 22
    Arrives
    Mon, Nov 15 – Mon, Nov 22
    Questions? Call 1-888-757-4774 or LiveChat Img Chat Us
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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
    $23.49 each
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    205
    Tue, Nov 2
    205
    QtyArrives
    205 Tue, Nov 2
    Questions? Call 1-888-757-4774
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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)
    $11.79 each
      Box Up & Save 4%  
    $56.40 box of 5
    $11.28 each
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    Mon, Nov 15 – Mon, Nov 22
    Arrives
    Mon, Nov 15 – Mon, Nov 22
    Questions? Call 1-888-757-4774 or LiveChat Img Chat Us
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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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    266
    Tue, Nov 2
    266
    QtyArrives
    266 Tue, Nov 2
    Questions? Call 1-888-757-4774
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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
    (15)
    $23.29 each
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    172
    Tue, Nov 2
    172
    QtyArrives
    172 Tue, Nov 2
    Questions? Call 1-888-757-4774
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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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    500
    Tue, Nov 2
    500
    QtyArrives
    500 Tue, Nov 2
    Questions? Call 1-888-757-4774
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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
      Box Up & Save 6%  
    $83.00 box of 25
    $3.32 each
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    132
    Tue, Nov 2
    132
    QtyArrives
    132 Tue, Nov 2
    Questions? Call 1-888-757-4774
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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
    $8.89 each
      Box Up & Save 4%  
    $212.25 box of 25
    $8.49 each
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    69
    Tue, Nov 2
    69
    QtyArrives
    69 Tue, Nov 2
    Questions? Call 1-888-757-4774
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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
    $2.78 each
      Box Up & Save 5%  
    $66.00 box of 25
    $2.64 each
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    122
    Tue, Nov 2
    122
    QtyArrives
    122 Tue, Nov 2
    Questions? Call 1-888-757-4774
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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
    (3)
    $21.45 each
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    136
    Tue, Nov 2
    136
    QtyArrives
    136 Tue, Nov 2
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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
    $12.79 each
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    $304.75 box of 25
    $12.19 each
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    44
    Tue, Nov 2
    44
    QtyArrives
    44 Tue, Nov 2
    Questions? Call 1-888-757-4774
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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 DNTT074 1-1/2" x 4" Galvanized Steel Dielectric Nipple w/ Pex Insulator
    SKU: DNTT074 Matco-Norca
    SKU: DNTT074
    Brand: Matco-Norca
    (1)
    $8.19 each
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    $196.25 box of 25
    $7.85 each
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    105
    Tue, Nov 2
    105
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    105 Tue, Nov 2
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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 DNTT084 2" x 4" Galvanized Steel Dielectric Nipple w/ Pex Insulator
    SKU: DNTT084 Matco-Norca
    SKU: DNTT084
    Brand: Matco-Norca
    (2)
    $10.39 each
      Box Up & Save 4%  
    $400.40 box of 40
    $10.01 each
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    Mon, Nov 15 – Mon, Nov 22
    Arrives
    Mon, Nov 15 – Mon, Nov 22
    Questions? Call 1-888-757-4774 or LiveChat Img Chat Us
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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
    $31.99 each
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    165
    Tue, Nov 2
    165
    QtyArrives
    165 Tue, Nov 2
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  • 1-1/2" FNPT x Copper Press Dielectric Union, P-571NL (Lead Free) Product Image
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    1-1/2" FNPT x Copper Press Dielectric Union, P-571NL (Lead Free) 301-107PNL 1-1/2" FNPT x Copper Press Dielectric Union, P-571NL (Lead Free)
    SKU: 301-107PNL Legend Valve
    SKU: 301-107PNL
    Brand: Legend Valve
    $45.59 each
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    77
    Tue, Nov 2
    77
    QtyArrives
    77 Tue, Nov 2
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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
    $18.69 each
      Box Up & Save 5%  
    $212.28 box of 12
    $17.69 each
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    54
    Tue, Nov 2
    54
    QtyArrives
    54 Tue, Nov 2
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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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