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 -

Union Elbows

StyleModelKit TypeAda CompliantPrice
ATWHV-RK 3/4-1--€90.05
B406-RW-STEM KIT 3--€1,293.49
RFQ
CISPTMSTCVR-1MG3MGH-RKCover KitN€150.44
D6 LL-HKLever Handle Kit-€40.55
ERK CP-16Repair Kit-€148.22
RFQ
F27 BSK-SS-RKRepair Kit-€134.22
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
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 SizeApplicationFitting Side A Nominal Pipe SizeFitting Side B MaterialFitting Side B Nominal Pipe SizeFitting Side B TypeHex SizeOverall LengthPrice
ALF3003 1 1/4--------€151.29
BLF3003 2--------€340.56
CLF3003 1 1/21 1/2"Non-Potable Water, Steam1 1/2"Malleable Iron1 1/2"NPT3 1/2"2 3/4"€218.43
D11/4 LF30031 1/4"Potable Water, Steam1 1/4"Steel1 1/4"NPT2 3/4"2 3/4"€122.50
C1 LF30031"Non-Potable Water, Steam1"Steel1"Fbp2 1/4"2 1/2"€64.93
C1/2 LF30031/2"Non-Potable Water, Steam1/2"Steel1/2"NPT1 5/8"2 1/4"€41.44
C2 LF30032"Non-Potable Water, Steam2"Malleable Iron2"NPT4 1/8"3 1/8"€258.78
C3/4 LF30033/4"Non-Potable Water, Steam3/4"Steel3/4"NPT1 7/8"2 1/4"€50.32
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 -

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 SizeBody MaterialFitting Side A MaterialFitting Side A Nominal Pipe SizeFitting Side B MaterialFitting Side B Nominal Pipe SizeOverall LengthAdapter MaterialPrice
ALF3004 1 1/4-------Steel€80.07
BLF3004 1 1/2-------Malleable Iron€121.69
BLF3004 1/2-------Steel€40.02
BLF3004 1-------Steel€60.05
ALF3004 3/4-------Steel€45.64
C11/2 LF30041 1/2"Malleable IronMalleable Iron1 1/2"Malleable Iron1 1/2"2 3/4"-€93.82
A1 1/4 LF30041 1/4"IronSteel1 1/4"Steel1 1/4"2 3/4"-€93.40
D1 LF 3004-11"-Steel1"Steel1"2 1/2"-€118.54
D1/2 LF 3004-1/21/2"-Steel1/2"Steel1/2"2 1/4"-€49.01
E2 LF30042"Malleable IronMalleable Iron2"Malleable Iron2"3 1/8"-€186.13
D3/4 LF 3004 3/43/4"-Steel3/4"Steel3/4"2 1/4"-€55.91
WATTS -

Gasket Kits

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

LF301 Series Dielectric Unions

StyleModelInlet SizeOutlet SizeInsulation MaterialMax. Working PressureAdapter MaterialGasket MaterialInlet TypeLeadPrice
ALF301 1 1/21 1/2"1 1/2"Plastic-SteelEPDMFemale ThreadedNot Present€35.44
ALF301 1 1/41 1/4"1 1/4"Plastic-SteelEPDMFemale ThreadedNot Present€23.28
ALF301 11"1"Plastic-SteelEPDMFemale ThreadedNot Present€15.15
BLF301 1/21/2"1/2"Plastic250 psiSteelEPDMFemale ThreadedNot Present€16.35
ALF301 22"2"Plastic-SteelEPDMFemale ThreadedNot Present€49.22
ALF301 3/43/4"3/4"Plastic-SteelEPDMFemale ThreadedNot Present€27.42
WATTS -

LF3006 Series Dielectric Unions

StyleModelPipe SizeFitting Side A MaterialFitting Side A Nominal Pipe SizeFitting Side B MaterialFitting Side B Nominal Pipe SizeOverall LengthHex SizeAdapter MaterialPrice
ALF3006 2-------Malleable Iron€180.14
ALF3006 3/4-------Steel€45.64
ALF3006 1-------Steel€60.05
BLF3006 1/2-------Steel€34.43
C1 1/2 LF30061 1/2"Malleable Iron1 1/2"Malleable Iron1 1/2"2 3/4"3 1/2"-€92.50
DLF3006 1 1/41 1/4"Steel1 1/4"Steel1 1/4"2 3/4"2 3/4"-€81.62
E1 LF30061"Steel1"Steel1"2 1/2"2 1/4"-€47.52
F1/2 LF30061/2"Steel1/2"Steel1/2"2 1/4"--€40.55
G2 LF30062"Malleable Iron2"Malleable Iron2"3 1/8"4 1/8"-€235.98
H3/4 LF30063/4"Steel3/4"Steel3/4"2 1/4"1 7/8"-€36.03
WATTS -

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 2-----2"2"-€146.62
ALF3001A 1 1/2-----1 1/2"1 1/2"-€118.60
ALF3001A 1 1/4-----1 1/4"1 1/4"-€69.66
BLF3001A 1/2-----1/2"1/2"-€38.78
ALF3001A 3/4-----3/4"3/4"-€23.56
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
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 -

RK-3000 Series Dielectric Union Repair Kit

StyleModelKit TypeKit ContentsAda CompliantPrice
AKIT GA-H---€6.63
BKIT GB-C---€15.86
CKIT GB-E---€26.18
DKIT GB-F---€40.91
EKIT GA-J---€6.63
FKIT GA-D---€8.12
GKIT GB-D---€21.40
HKIT GA-C---€6.63
IKIT GA-G---€5.90
JKIT GB-A---€11.80
KKIT GA-AGasket Kit2 GA Gaskets Per Kit-€5.50
LKIT GA-RGasket Kit2 GA Gaskets Per Kit-€36.14
MKIT GA-BGasket Kit2 GA Gaskets Per Kit-€4.53
NKIT GA-FGasket Kit2 GA Gaskets Per Kit-€10.69
OKIT GA-LGasket Kit2 GA Gaskets Per Kit-€12.53
PKIT GA-PGasket Kit2 GA Gaskets Per Kit-€36.14
QKIT GB-BGasket Kit2 GB Gaskets Per Kit-€13.29
RKIT GA-QGasket Kit2 GA Gaskets Per Kit-€41.30
SKIT GA-MGasket Kit2 GA Gaskets Per Kit-€15.86
TKIT GA-EGasket Kit--€8.47
UINK-A-KITInsulator Kit2 Insulators Per Kit-€5.90
VINK-G-KITInsulator Kit-N€7.74
WINK-E-KITInsulator Kit2 Insulators Per KitN€7.74
XINK-H-KITInsulator Kit2 Insulators Per KitN€8.83
YINK-F-KITInsulator Kit2 Insulators Per Kit-€8.83
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
C3/4 LF30083/4"3/4"3/4"1 5/8"2 1/8"FIP x SolderLead Free Brass-€59.96
ZURN -

DUXLC Dielectric Pipe Fittings

StyleModelMPNPrice
A1-DUXLC1-DUXLC€114.55
B2-DUXLC2-DUXLC€247.89
C3-DUXLC3-DUXLC€392.34
D12-DUXLC12-DUXLC€37.76
E34-DUXLC34-DUXLC€41.58
F112-DUXLC112-DUXLC€129.14
G114-DUXLC114-DUXLC€89.73
H212-DUXLC212-DUXLC€606.77
StyleModelBody MaterialPrice
A701-504GBrass€13.58
RFQ
A701-505GBrass€20.70
RFQ
A701-503GBrass€9.70
RFQ
StyleModelInlet SizeMax. Working PressureGasket MaterialGasket Maximum PressureGasket Maximum TemperatureInlet MaterialInlet Thread TypeInlet TypePrice
A3004 1 1/41 1/4"250 psiBuna N250 psi180°FIronNPTFemale Threaded€65.64
RFQ
A3004 1/21/2"250 psiBuna N250 psi180°FIronNPTFemale Threaded€32.83
RFQ
StyleModelBody MaterialPrice
A701-705GBrass€20.87
RFQ
A701-706GBrass€28.49
RFQ
A701-707GBrass€40.44
RFQ
A701-708GBrass€67.42
RFQ
A701-703GBrass€11.88
RFQ
A701-704GBrass€14.89
RFQ
StyleModelBody MaterialPrice
A701-804GBrass€17.30
RFQ
A701-803GBrass€14.08
RFQ
StyleModelBody MaterialPrice
A701-304GBrass€10.98
RFQ
A701-306GBrass€15.39
RFQ
WATTS -

Fiberglass Protective Insulated Backflow Enclosures

StyleModelAda CompliantKit TypePrice
A3002 3/4--€31.20
RFQ
BISPTMSTSEAT-16-3GH-RKNReplacement Part€40.19
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€788.52
C3 LF31103"3"3"SolderBrass175 psiBrassSolder€658.34
WATTS -

LF3100 Series Dielectric Unions

StyleModelInlet SizeOutlet SizeMax. Working PressureInsulation MaterialAdapter MaterialGasket MaterialGasket Maximum PressureGasket Maximum TemperaturePrice
ALF3100M3 2 1/22 1/2"2 1/2"175 psiPolysulfoneCast IronBuna N250 psi180°F€439.52
RFQ
BLF3100M3 33"3"175 psiPolysulfoneCast IronBuna N250 psi180°F€602.83
RFQ
BLF3100M3 44"4"175 psiPolysulfoneCast IronBuna N250 psi180°F€1,595.52
RFQ

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.