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>
WATTS -

LF3110 Series Dielectric Unions

StyleModelPipe SizeFitting Side A Nominal Pipe SizeFitting Side B Nominal Pipe SizeConnection TypeBody MaterialMax. PressureColorConnection SurfacePrice
ALF3110-LF 3-----175 psi--€725.31
RFQ
BLF3110 2 1/22 1/2"2 1/2"2 1/2"SolderBrass175 psiBrassSolder€844.84
C3 LF31103"3"3"SolderBrass175 psiBrassSolder€658.34
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LF3001A Series Dielectric Unions

StyleModelPipe SizeFitting Side A Nominal Pipe SizeFitting Side A TypeFitting Side B Nominal Pipe SizeFitting Side B TypeInlet SizeOutlet SizeOverall LengthPrice
ALF3001A 1-----1"1"-€41.76
ALF3001A 1 1/4-----1 1/4"1 1/4"-€69.66
ALF3001A 3/4-----3/4"3/4"-€23.56
ALF3001A 2-----2"2"-€146.62
ALF3001A 1 1/2-----1 1/2"1 1/2"-€118.60
BLF3001A 1/2-----1/2"1/2"-€38.78
C11/2 LF 3001A-1 1/2 1 1/2"1 1/2"NPT1 1/2"Solder--3"€80.95
C11/4 LF 3001A-1 1/4 1 1/4"1 1/4"NPT1 1/4"Solder--3"€60.28
C1 LF 3001A-1 1"1"NPT1"Solder--2 1/2"€36.08
C1/2 LF 3001A-1/2 1/2"1/2"Female Threaded1/2"Socket--1 7/8"€20.48
C2 LF 3001A-2 2"2"NPT2"Solder--3"€106.53
C3/4 LF 3001A-3/4 3/4"3/4"NPT3/4"Solder--2 1/8"€24.23
WATTS -

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.

StyleModelPipe SizeAdapter MaterialFitting Side A MaterialFitting Side A Nominal Pipe SizeFitting Side B MaterialFitting Side B Nominal Pipe SizeInlet MaterialInlet SizePrice
ALF3004 1-Steel----Steel1"€60.05
BLF3004 1 1/4-Steel----Steel1 1/4"€80.07
BLF3004 3/4-Steel----Steel3/4"€45.64
ALF3004 1 1/2-Malleable Iron----Malleable Iron1 1/2"€121.69
ALF3004 1/2-Steel----Steel1/2"€40.02
C11/2 LF30041 1/2"-Malleable Iron1 1/2"Malleable Iron1 1/2"--€93.82
D1 LF 3004-11"-Steel1"Steel1"--€118.54
D1/2 LF 3004-1/21/2"-Steel1/2"Steel1/2"--€49.01
E2 LF30042"-Malleable Iron2"Malleable Iron2"--€186.13
D3/4 LF 3004 3/43/4"-Steel3/4"Steel3/4"--€55.91
MUELLER STREAMLINE -

PRS Dielectric Unions

StyleModelMPNPrice
APF 11503PF 11503€100.89
APF 11504PF 11504€108.10
APF 11505PF 11505€138.68
APF 11506PF 11506€179.03
APF 11507PF 11507€208.28
APF 11508PF 11508€292.25
StyleModelPipe SizeFitting Side A Nominal Pipe SizeFitting Side B Nominal Pipe SizeOverall LengthConnection TypeApplicationColorFitting Side A GenderPrice
A1/2 LF 3005-1/2A1/2"1/2"1/2"2 5/8"MIP x SolderNon-Potable Water, SteamBrassMale€23.76
A3/4 LF 3005-3/4A3/4"3/4"3/4"3"MIP x SolderNon-Potable Water, SteamBrassMale€28.27
APPROVED VENDOR -

Dielectric Union, FIP x Solder

StyleModelPipe SizeFitting Side A MaterialFitting Side A Nominal Pipe SizeFitting Side A Pipe ThreadingFitting Side B Nominal Pipe SizeHex SizeOverall LengthConnection TypePrice
A168-007NL-Steel1 1/2"11 1/2"1 1/2"2 3/4"2 3/4"FIP x Solder€106.16
B168-005NL1"Steel1"11 1/2"1"1 15/16"2 1/4"FIP x Solder€45.33
C168-003NL1/2"Iron1/2"141/2"1 3/8"1 3/4"FIP x Solder€22.68
D168-004NL3/4"Iron3/4"143/4"1 9/16"2"FIP x Solder€24.68
WATTS -

LF3100 Series, Dielectric Flange, FIP x Solder

StyleModelPipe SizeFitting Side A Nominal Pipe SizeFitting Side B Nominal Pipe SizeMax. PressurePipe Fitting MaterialOverall LengthConnection TypeBody MaterialPrice
A2 1/2 LF31002 1/2"2 1/2"2 1/2"175 psiCopper, Iron4 1/4"FIP x SolderCopper, Iron€461.12
B2 LF 3100 2 2"2"2"250 psiBrass, Malleable Iron-FIP x Solder-€471.54
C3 LF31003"3"3"175 psiCopper, Iron4 1/2"FIP x SolderCopper, Iron€462.14
WATTS -

LF3002 Series Dielectric Unions

StyleModelPipe SizeConnection TypeInsulation MaterialBody MaterialGasket MaterialMax. PressureApplicationAdapter MaterialPrice
ALF3002 3/4--Polysulfone-Buna N250 psi-Steel€38.83
B1 LF30021"FIP x Solder-Copper, IronBuna N250 psiNon-Potable Water, Steam-€44.69
WATTS -

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.

StyleModelPipe SizeFitting Side A Nominal Pipe SizeFitting Side B MaterialFitting Side B Nominal Pipe SizeFitting Side B TypeHex SizeOverall LengthAdapter MaterialPrice
ALF3003 2-------Malleable Iron€340.56
BLF3003 1 1/4-------Steel€280.36
CLF3003 1 1/21 1/2"1 1/2"Malleable Iron1 1/2"NPT3 1/2"2 3/4"-€218.43
CLF3003 11"1"Steel1"Fbp2 1/4"2 1/2"-€64.93
C1/2 LF30031/2"1/2"Steel1/2"NPT1 5/8"2 1/4"-€41.44
C3/4 LF30033/4"3/4"Steel3/4"NPT1 7/8"2 1/4"-€50.32
WATTS -

LF3008 Series Dielectric Unions

StyleModelPipe SizeFitting Side A Nominal Pipe SizeFitting Side B Nominal Pipe SizeHex SizeOverall LengthConnection TypeBody MaterialInsulation MaterialPrice
ALF3008 3/4-------Polysulfone€56.85
B1 LF30081"1"1"1 7/8"2 1/2"FIP x SolderLead Free Brass-€70.70
C1/2 LF30081/2"1/2"1/2"1 1/2"1 7/8"FIP x SolderLead Free Brass-€63.75
WATTS -

Gasket Kits

StyleModelKit ContentsKit TypePrice
AKIT GB-K2 GB Gaskets Per KitGasket Kit€21.40
BKIT GB-P2 GB Gaskets Per KitGasket Kit€45.74
CKIT GB-H2 GB Gaskets Per KitGasket Kit€13.29
DKIT GB-Q2 GB Gaskets Per KitGasket Kit€48.29
EKIT GB-N2 GB Gaskets Per KitGasket Kit€39.07
FKIT GB-L2 GB Gaskets Per KitGasket Kit€26.18
GKIT GB-M2 GB Gaskets Per KitGasket Kit€40.91
HKIT GB-G2 GB Gaskets Per KitGasket Kit€13.29
IKIT GB-R2 GB Gaskets Per KitGasket Kit€75.60
WATTS -

LF4001E Series Dielectric Unions

StyleModelInlet SizeNut MaterialOutlet SizeInsulation MaterialMax. Working PressureAdapter MaterialGasket MaterialInlet MaterialPrice
ALF4001E 1 1/21 1/2"Malleable Iron1 1/2"Polysulfone250 psiSteelBuna NSteel€148.90
ALF4001E 1 1/41 1/4"Steel1 1/4"Polysulfone250 psiSteelBuna NSteel€102.47
ALF4001E 11"Steel1"Polysulfone250 psiSteelBuna NSteel€62.85
ALF4001E 1/21/2"Steel1/2"Polysulfone250 psiSteelBuna NSteel€28.41
BLF4001E 22 1/2"Malleable Iron2 1/2"Polysulfone-SteelBuna NSteel€208.95
CLF4001E 3/43/4"Steel3/4"Polysulfone-SteelBuna NSteel€28.41
StyleModelInlet SizeOutlet SizeInsulation MaterialAdapter MaterialGasket MaterialInlet MaterialInlet TypeLeadPrice
ALF3005A 1/21/2"1/2"PolysulfoneSteelBuna NSteelMale ThreadedNot Present€22.91
ALF3005A 3/43/4"3/4"PolysulfoneSteelBuna NSteelMale ThreadedNot Present€21.82
WATTS -

LF3006 Series Dielectric Unions

StyleModelPipe SizeAdapter MaterialInlet MaterialInlet SizeNut MaterialOutlet MaterialOutlet SizeFitting Side A MaterialPrice
ALF3006 2-Malleable IronMalleable Iron2"Malleable IronMalleable Iron2"-€180.14
ALF3006 3/4-SteelSteel3/4"SteelSteel3/4"-€45.64
ALF3006 1-SteelSteel1"SteelSteel1"-€60.05
BLF3006 1/2-SteelMalleable Iron1/2"SteelMalleable Iron--€34.43
C1 1/2 LF30061 1/2"------Malleable Iron€92.50
DLF3006 1 1/41 1/4"------Steel€81.62
WATTS -

RK-3100/3110/3200 Series Dielectric Union Repair Kit

StyleModelKit ContentsKit TypePrice
AINS-KIT 7/8100 Insulators Per KitInsulator Kit€10.32
BINS-KIT 1/2100 Insulators Per KitInsulator Kit€8.12
BINS-KIT 3/4100 Insulators Per KitInsulator Kit€10.32
CINS-KIT 5/8100 Insulators Per KitInsulator Kit€9.23
StyleModelBody MaterialPrice
A701-413Brass€6.38
RFQ
A701-415Brass€13.94
RFQ
A701-417Brass€31.89
RFQ
A701-414Brass€8.56
RFQ
A701-416Brass€21.19
RFQ
A701-418Brass€51.47
RFQ
WATTS -

RK-3000 Series Dielectric Union Repair Kit

StyleModelKit TypeKit ContentsAda CompliantPrice
AKIT GA-H---€6.63
BKIT GB-F---€40.91
CKIT GA-J---€6.63
DKIT GA-G---€5.90
EKIT GA-D---€8.12
FKIT GB-E---€26.18
GKIT GA-C---€6.63
HKIT GB-D---€21.40
IKIT GB-C---€15.86
JKIT GB-A---€11.80
KKIT GA-FGasket Kit2 GA Gaskets Per Kit-€10.69
LKIT GA-RGasket Kit2 GA Gaskets Per Kit-€36.14
MKIT GA-EGasket Kit--€8.47
NKIT GB-BGasket Kit2 GB Gaskets Per Kit-€13.29
OKIT GA-LGasket Kit2 GA Gaskets Per Kit-€12.53
PKIT GA-QGasket Kit2 GA Gaskets Per Kit-€41.30
QKIT GA-MGasket Kit2 GA Gaskets Per Kit-€15.86
RKIT GA-PGasket Kit2 GA Gaskets Per Kit-€36.14
SKIT GA-AGasket Kit2 GA Gaskets Per Kit-€5.50
TKIT GA-BGasket Kit2 GA Gaskets Per Kit-€4.53
UINK-G-KITInsulator Kit-N€7.74
VINK-J-KITInsulator Kit8 Insulators Per KitN€42.77
WINK-E-KITInsulator Kit2 Insulators Per KitN€7.74
XINK-B-KITInsulator Kit2 Insulators Per Kit-€5.90
YINK-H-KITInsulator Kit2 Insulators Per KitN€8.83
StyleModelBody MaterialPrice
A701-306GBrass€15.39
RFQ
A701-304GBrass€10.98
RFQ
WATTS -

LF3007 Series Dielectric Unions

StyleModelInlet SizeOutlet SizeInsulation MaterialMax. Working PressureAdapter MaterialGasket MaterialInlet MaterialInlet TypePrice
ALF3007 1/21/2"3/8"Polysulfone250 psiSteelBuna NIronMale Threaded€50.43
BLF3007 3/43/4"1/2"Polysulfone-SteelBuna NIronMale Threaded€56.45
StyleModelBody MaterialPrice
A701-103GBrass€6.06
RFQ
A701-104GBrass€7.90
RFQ
A701-106GBrass€16.62
RFQ
A701-105GBrass€11.37
RFQ
A701-107GBrass€24.41
RFQ
A701-108GBrass€41.00
RFQ
StyleModelMPNPrice
A703-102703-102€15.25
RFQ
A703-103703-103€16.45
RFQ
A703-104703-104€16.59
RFQ
A704-102704-102€19.72
RFQ
A704-103704-103€20.43
RFQ
A704-104704-104€21.37
RFQ
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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.