Dielectric Unions

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<p>Dielectric unions provide insulation between incompatible materials for joining them safely. They avoid electrolysis, which leads to corrosion or pipe failure. They are ideal for pipe sizes ranging from 3/4 to 4 inches. </p>
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LF3008 Series Dielectric Unions

StyleModelHex SizePipe SizePrice (ex. VAT)
ALF3008 3/4--€56.27
BLF3008 1/21.5"1/2"€39.16
B3/4 LF30081.625"3/4"€46.16
CLF3008 11.875"1"€52.72
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RK-3000 Series Dielectric Union Repair Kit

StyleModelItemPrice (ex. VAT)
AKIT GA-AGasket Kit€5.45
BKIT GA-MGasket Kit€15.70
CKIT GA-LGasket Kit€12.41
DKIT GA-GGasket Kit€5.84
EKIT GB-AGasket Kit€11.68
FKIT GA-BGasket Kit€4.49
GKIT GA-FGasket Kit€10.58
HKIT GA-RGasket Kit€35.77
IKIT GB-BGasket Kit€13.15
JKIT GA-QGasket Kit€40.89
KKIT GA-PGasket Kit€35.77
LKIT GA-EGasket Kit€8.39
MKIT GB-FGasket Kit€40.49
NKIT GA-HGasket Kit€6.57
OKIT GB-CGasket Kit€15.70
PKIT GB-EGasket Kit€25.91
DKIT GA-JGasket Kit€6.57
QKIT GA-DGasket Kit€8.04
RKIT GB-DGasket Kit€21.19
SKIT GA-CGasket Kit€6.57
TINK-G-KITInsulator Kit€7.66
UINK-E-KITInsulator Kit€7.66
VINK-H-KITInsulator Kit€8.74
WINK-D-KITInsulator Kit€6.57
XINK-A-KITInsulator Kit€5.84
StyleModelInlet SizePrice (ex. VAT)
A3004 1 1/41 1/4"€64.97
RFQ
A3004 1/21/2"€32.50
RFQ
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LF3007 Series Dielectric Unions

StyleModelGasket MaterialInlet SizeOutlet SizePrice (ex. VAT)
ALF3007 3/4Buna-N3/4"1/2"€55.88
BLF3007 1/2Buna N1/2"3/8"€49.92
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3001A Series Dielectric Unions

StyleModelGasket MaterialInlet SizeOutlet SizePrice (ex. VAT)
A3001A 1 1/2Buna-N1-1/2"1-1/2"€96.45
A3001A 1 1/4Buna-N1-1/4"1-1/4"€56.55
A3001A 2Buna-N2"2"€119.23
B3001A 1/2Buna N1/2"-€19.25
RFQ
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LF3100 Series Dielectric Unions

StyleModelInlet SizeOutlet SizePrice (ex. VAT)
ALF3100M3 2 1/22 1/2"2-1/2"€435.08
RFQ
BLF3100M3 33"3"€596.74
RFQ
BLF3100M3 44"4"€1,579.41
RFQ
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LF3110 Series Dielectric Unions

StyleModelItemPipe SizePrice (ex. VAT)
ALF3110 2 1/2Dielectric Flange2.5"€522.51
BLF3110 3Dielectric Flange3"€506.70
CLF3110-LF 3Pipe Fitting-€717.99
RFQ
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DUXLC Dielectric Pipe Fittings

ZURN -

DUXL Dielectric Pipe Fittings

StyleModel
A114-DUXL
RFQ
B1-DUXL
RFQ
A112-DUXL
RFQ
A12-DUXL
RFQ
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LF3004 Series Dielectric Unions

Watts LF3004 Series dielectric unions are used in commercial and industrial applications to prevent accelerated corrosion and deterioration in piping systems caused by galvanic and stray currents. They are installed between pipes made from dissimilar metals. These dielectric unions feature steel / iron / galvanised malleable iron / malleable iron & galvanised steel construction for structural rigidity and long service life. They have polysulfone insulation to prevent electrical hazards during operations and come with Buna-N gaskets for secure & reliable sealing between the pipes.

StyleModelBody MaterialGasket MaterialHex SizeInlet MaterialInlet SizeOutlet MaterialOutlet SizePipe SizePrice (ex. VAT)
ALF3004 1 1/2-Buna N-Malleable Iron1 1/2"Malleable Iron1-1/2"-€120.46
ALF3004 1-Buna N-Steel1"Steel1"-€59.45
BLF3004 3/4-Buna-N-Steel3/4"Steel3/4"-€45.18
BLF3004 1 1/4-Buna-N-Steel1-1/4"Steel1-1/4"-€79.26
ALF3004 1/2-Buna N-Steel1/2"Steel1/2"-€39.61
C11/2 LF3004Galvanized Malleable IronBuna-N3.5"----1.5"€72.20
DLF3004 2Galvanized Malleable IronBuna-N4.125"----2"€115.12
B1 1/4 LF3004IronBuna-N2.75"----1.25"€55.01
E1/2 LF 3004-1/2Malleable Iron and Galvanized SteelBuna-N1.625"----1/2"€37.73
E3/4 LF 3004 3/4Malleable Iron and Galvanized SteelBuna-N1.875"----3/4"€43.02
E1 LF 3004-1Malleable Iron and Galvanized SteelBuna-N2.25"----1"€73.31
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LF3003 Series Dielectric Unions

Watts LF3003 Series dielectric unions are installed at the junction of pipes with varying metal compositions, such as water heaters or pumps, to isolate the metals and reduce potential corrosion caused by electrolysis. These unions effectively maintain water quality and extend the lifespan of plumbing systems by preventing leaks and deterioration due to the chemical reactions caused by metal interaction. The brand's LF3003 Series dielectric unions safeguard water distribution systems, ensuring reliability and durability. They come with a comprehensive assembly consisting of a union nut, two tailpieces and a gasket. This combination creates a robust barrier against electric currents, effectively preventing galvanic corrosion. They have a design with a female iron pipe thread to female brass pipe thread connection, facilitating seamless integration and secure attachment between different types of pipes. These dielectric unions have Buna-N gasket, preventing leakage.

StyleModelBody MaterialGasket MaterialHex SizeInlet MaterialInlet SizeOutlet SizePipe SizePrice (ex. VAT)
ALF3003 1 1/4-Buna-N-Steel1-1/4"1-1/4"-€149.76
BLF3003 2-Buna N-Malleable Iron2"2"-€273.42
C2 LF3003Lead Free Brass and Malleable IronBuna-N4.125"---2"€152.41
CLF3003 1 1/2Lead Free Brass and Malleable IronBuna-N3.5"---1.5"€128.67
CLF3003 1/2Lead Free Brass and SteelBuna-N1.625"---1/2"€31.89
CLF3003 3/4Lead Free Brass and SteelBuna-N1.875"---3/4"€38.72
CLF3003 1Lead Free Brass and SteelBuna-N2.25"---1"€49.98
D11/4 LF3003Lead Free Brass and SteelBuna-N2.75"---1.25"€90.91
APPROVED VENDOR -

Dielectric Union, FIP x Solder

StyleModelPipe SizePrice (ex. VAT)
A2TFA21"€27.41
B2TFA31.5"€64.12
C2TEZ91/2"€13.69
D2TFA13/4"€14.91
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LF3002 Series Dielectric Unions

StyleModelPrice (ex. VAT)
ALF3002 1€27.04
BLF3002 3/4€38.44
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Gasket Kits

StyleModelPrice (ex. VAT)
AKIT GB-H€13.15
BKIT GB-L€25.91
CKIT GB-N€38.67
DKIT GB-G€13.15
EKIT GB-K€21.19
FKIT GB-M€40.49
GKIT GB-R€74.83
HKIT GB-Q€47.80
IKIT GB-P€45.28
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LF4001E Series Dielectric Unions

StyleModelGasket MaterialInlet SizeOutlet SizePrice (ex. VAT)
ALF4001E 2Buna-N2-1/2"2-1/2"€206.84
BLF4001E 3/4Buna-N3/4"3/4"€28.13
CLF4001E 1/2Buna N1/2"1/2"€28.13
CLF4001E 1Buna N1"1"€62.21
CLF4001E 1 1/2Buna N1 1/2"1-1/2"€147.39
CLF4001E 1 1/4Buna N1 1/4"1-1/4"€101.43
StyleModelInlet SizeOutlet SizePrice (ex. VAT)
ALF3005A 1/21/2"1/2"€22.68
ALF3005A 3/43/4"3/4"€21.60
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LF3001A Series Dielectric Unions

StyleModelGasket MaterialHex SizeInlet SizeOutlet SizePipe SizePrice (ex. VAT)
A1/2 LF 3001A-1/2"Buna-N1.5"--1/2"€15.77
A3/4 LF 3001A-3/4"Buna-N1.625"--3/4"€18.64
A1 LF 3001A-1"Buna-N1.875"--1"€27.77
A11/4 LF 3001A-1 1/4"Buna-N2.25"--1.25"€44.73
A11/2 LF 3001A-1 1/2"Buna-N2.75"--1.5"€62.31
A2 LF 3001A-2"Buna-N3.5"--2"€82.00
BLF3001A 1Buna-N-1"1"-€41.34
BLF3001A 2Buna-N-2"2"-€145.14
BLF3001A 1 1/2Buna-N-1-1/2"1-1/2"-€117.40
BLF3001A 1 1/4Buna-N-1-1/4"1-1/4"-€68.95
BLF3001A 3/4Buna-N-3/4"3/4"-€23.32
CLF3001A 1/2Buna N-1/2"1/2"-€24.56
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LF3006 Series Dielectric Unions

StyleModelBody MaterialGasket MaterialHex SizeInlet MaterialInlet SizeOutlet MaterialOutlet SizePipe SizePrice (ex. VAT)
ALF3006 2-Buna-N-Malleable Iron2"Malleable Iron2"-€178.32
ALF3006 3/4-Buna-N-Steel3/4"Steel3/4"-€45.18
ALF3006 1-Buna-N-Steel1"Steel1"-€59.45
BLF3006 1/2-Buna N-Malleable Iron1/2"Malleable Iron--€34.08
C1 1/2 LF3006Black Malleable IronBuna-N3.5"----1.5"€71.19
D2 LF3006Black Malleable IronBuna-N4.125"----2"€145.94
E1/2 LF3006Malleable IronBuna-N1.625"----1/2"€24.76
F3/4 LF3006Malleable IronBuna-N1.875"----3/4"€27.72
G1 LF3006Malleable IronBuna-N2.25"----1"€36.58
HLF3006 1 1/4Malleable IronBuna-N2.75"----1.25"€49.85
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LF301 Series Dielectric Unions

StyleModelInlet SizeOutlet SizePrice (ex. VAT)
ALF301 11"1"€14.99
ALF301 1 1/21-1/2"1-1/2"€35.08
ALF301 1 1/41-1/4"1-1/4"€23.05
BLF301 1/21/2"1/2"€9.27
ALF301 22"2"€48.73
ALF301 3/43/4"3/4"€9.31
StyleModelHex SizePipe SizePrice (ex. VAT)
A1/2 LF 3005-1/2A1.5"1/2"€14.60
A3/4 LF 3005-3/4A1.625"3/4"€18.24
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LF3100 Series, Dielectric Flange, FIP x Solder

StyleModelBody MaterialMax. PressurePipe SizePrice (ex. VAT)
A2 1/2 LF3100Copper and Iron175 psi2.5"€310.42
B3 LF3100Copper and Iron175 psi3"€391.99
C2 LF 3100 2"Malleable Iron and Brass250 psi2"€288.04
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Dielectric Unions

Watts dielectric unions are used in HVAC equipment, hot water storage tanks, and piping system for reducing the deterioration and accelerated corrosion caused due to stray and galvanic currents. These unions are capable of withstanding temperatures and pressures up to 180 degrees F and 250 psi, respectively. They are offered in FIP, MIP & solder connection options, to allow easy installation on pipe sizes ranging from 1/2 to 4 inches, on Raptor Supplies.

Frequently Asked Questions

What is stray current?

Stray current produces a high number of anodes & cathodes that can inadvertently enter an alternate (but unintended) path and create corrosion in the piping system.

What is the function of tailpieces in a dielectric union?

Tailpieces allow connecting ends of two dissimilar pipe systems so that liquid can be safely transported with minimal leakage.

How does the dielectric union break continuity?

When dielectric unions are connected between two dissimilar pipes, they ground the electric current and break continuity for complete insulation between the two environments.

How to install a dielectric union between steel and copper pipes?

  • Wrap several layers of sealing tape over the threads of the steel pipe.
  • Connect the threaded end of the dielectric union to the steel pipe and turn it clockwise using a pipe wrench.
  • Slide the union nut over the end of the copper pipe and place the plastic insulator over the copper pipe.
  • Install the copper solder adapter onto the copper pipe and sweat adapter using a propane torch.
  • Allow the pipe to cool.
  • Quickly slide the rubber gasket between the union nut & body and assemble it.
  • Inspect to ensure a watertight connection.

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