Dielectric Unions | Raptor Supplies United Kingdom

Dielectric Unions

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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.

ZURN -

DUXLC Dielectric Pipe Fittings

StyleModel
A34-DUXLC
RFQ
B3-DUXLC
RFQ
C2-DUXLC
RFQ
D112-DUXLC
RFQ
E12-DUXLC
RFQ
F212-DUXLC
RFQ
G114-DUXLC
RFQ
H1-DUXLC
RFQ
APPROVED VENDOR -

Dielectric Union, FIP x Solder

StyleModelPipe SizePrice (inc. VAT)
A168-005NL1"£28.53
B168-007NL1.5"£66.74
C2TEZ91/2"£14.25
D2TFA13/4"£15.52
StyleModelInlet SizeOutlet SizePrice (inc. VAT)
ALF3005A 1/21/2"1/2"£23.60
ALF3005A 3/43/4"3/4"£22.48
WATTS -

LF3006 Series Dielectric Unions

StyleModelBody MaterialGasket MaterialHex SizeInlet MaterialInlet SizeOutlet MaterialOutlet SizePipe SizePrice (inc. VAT)
ALF3006 1-Buna-N-Steel1"Steel1"-£61.87
ALF3006 1/2-Buna N-Malleable Iron1/2"Malleable Iron--£35.48
ALF3006 2-Buna-N-Malleable Iron2"Malleable Iron2"-£185.60
ALF3006 3/4-Buna-N-Steel3/4"Steel3/4"-£47.02
B1 1/2 LF3006Black Malleable IronBuna-N3.5"----1.5"£74.10
C2 LF3006Black Malleable IronBuna-N4.125"----2"£151.90
D1/2 LF3006Malleable IronBuna-N1.625"----1/2"£25.77
E3/4 LF3006Malleable IronBuna-N1.875"----3/4"£28.85
F1 LF3006Malleable IronBuna-N2.25"----1"£38.07
ALF3006 1 1/4Malleable IronBuna-N2.75"----1.25"£51.88
WATTS -

LF4001E Series Dielectric Unions

StyleModelGasket MaterialInlet SizeOutlet SizePrice (inc. VAT)
ALF4001E 2Buna-N2-1/2"2-1/2"£215.28
BLF4001E 3/4Buna-N3/4"3/4"£29.27
BLF4001E 1Buna N1"1"£64.75
BLF4001E 1/2Buna N1/2"1/2"£29.27
BLF4001E 1 1/4Buna N1 1/4"1-1/4"£105.57
BLF4001E 1 1/2Buna N1 1/2"1-1/2"£153.41
WATTS -

LF3001A Series Dielectric Unions

StyleModelGasket MaterialHex SizeInlet SizeOutlet SizePipe SizePrice (inc. VAT)
ALF3001A 2Buna-N-2"2"-£151.06
B1 LF 3001A-1"Buna-N1.875"--1"£28.90
C3/4 LF 3001A-3/4"Buna-N1.625"--3/4"£19.40
C1/2 LF 3001A-1/2"Buna-N1.5"--1/2"£16.41
B11/2 LF 3001A-1 1/2"Buna-N2.75"--1.5"£64.85
ALF3001A 1 1/2Buna-N-1-1/2"1-1/2"-£122.20
DLF3001A 1 1/4Buna-N-1-1/4"1-1/4"-£71.77
DLF3001A 3/4Buna-N-3/4"3/4"-£24.28
C11/4 LF 3001A-1 1/4"Buna-N2.25"--1.25"£46.56
C2 LF 3001A-2"Buna-N3.5"--2"£85.35
DLF3001A 1Buna-N-1"1"-£43.02
DLF3001A 1/2Buna N-1/2"1/2"-£25.56
WATTS -

Gasket Kits

StyleModelPrice (inc. VAT)
AKIT GB-K£22.05
BKIT GB-L£26.97
CKIT GB-P£47.12
DKIT GB-Q£49.76
EKIT GB-M£42.15
FKIT GB-N£40.25
GKIT GB-R£77.89
HKIT GB-G£13.69
IKIT GB-H£13.69
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.

StyleModelBody MaterialGasket MaterialHex SizeInlet MaterialInlet SizeOutlet MaterialOutlet SizePipe SizePrice (inc. VAT)
ALF3004 1 1/2-Buna N-Malleable Iron1 1/2"Malleable Iron1-1/2"-£125.38
ALF3004 3/4-Buna-N-Steel3/4"Steel3/4"-£47.02
ALF3004 1 1/4-Buna-N-Steel1-1/4"Steel1-1/4"-£82.50
ALF3004 1/2-Buna N-Steel1/2"Steel1/2"-£41.23
ALF3004 1-Buna N-Steel1"Steel1"-£61.87
ALF3004 2Galvanized Malleable IronBuna-N4.125"----2"£119.82
B11/2 LF3004Galvanized Malleable IronBuna-N3.5"----1.5"£75.15
C1 1/4 LF3004IronBuna-N2.75"----1.25"£57.26
D1/2 LF 3004-1/2Malleable Iron and Galvanized SteelBuna-N1.625"----1/2"£39.27
E1 LF 3004-1Malleable Iron and Galvanized SteelBuna-N2.25"----1"£76.31
D3/4 LF 3004 3/4Malleable Iron and Galvanized SteelBuna-N1.875"----3/4"£44.78
StyleModelPrice (inc. VAT)
ALF3002 1£28.14
ALF3002 3/4£40.00
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.

StyleModelBody MaterialGasket MaterialHex SizeInlet MaterialInlet SizeOutlet SizePipe SizePrice (inc. VAT)
ALF3003 1 1/4-Buna-N-Steel1-1/4"1-1/4"-£155.88
ALF3003 2-Buna N-Malleable Iron2"2"-£284.58
ALF3003 1 1/2Lead Free Brass and Malleable IronBuna-N3.5"---1.5"£133.93
B2 LF3003Lead Free Brass and Malleable IronBuna-N4.125"---2"£158.63
ALF3003 1/2Lead Free Brass and SteelBuna-N1.625"---1/2"£33.20
ALF3003 1Lead Free Brass and SteelBuna-N2.25"---1"£52.02
C11/4 LF3003Lead Free Brass and SteelBuna-N2.75"---1.25"£94.62
ALF3003 3/4Lead Free Brass and SteelBuna-N1.875"---3/4"£40.30
WATTS -

LF3008 Series Dielectric Unions

StyleModelHex SizePipe SizePrice (inc. VAT)
ALF3008 3/4--£58.57
ALF3008 1/21.5"1/2"£40.75
B3/4 LF30081.625"3/4"£48.04
ALF3008 11.875"1"£54.88
StyleModelInlet SizeOutlet SizePrice (inc. VAT)
ALF301 11"1"£15.61
ALF301 1 1/21-1/2"1-1/2"£36.52
ALF301 1 1/41-1/4"1-1/4"£23.99
ALF301 1/21/2"1/2"£9.65
ALF301 22"2"£50.71
ALF301 3/43/4"3/4"£9.69
ZURN -

DUXL Dielectric Pipe Fittings

StyleModel
A112-DUXL
RFQ
A114-DUXL
RFQ
A12-DUXL
RFQ
B1-DUXL
RFQ
WATTS -

Dielectric Union, MIP x Solder

StyleModelHex SizePipe SizePrice (inc. VAT)
A1/2 LF 3005-1/2A1.5"1/2"£15.20
B3/4 LF 3005-3/4A1.625"3/4"£18.98
WATTS -

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

StyleModelPrice (inc. VAT)
AINS-KIT 5/8£9.51
BINS-KIT 7/8£10.63
CINS-KIT 1/2£8.36
DINS-KIT 3/4£10.63
StyleModelInlet SizePrice (inc. VAT)
A3004 1 1/41 1/4"£67.63
RFQ
A3004 1/21/2"£33.82
RFQ
StyleModelGasket MaterialInlet SizeOutlet SizePrice (inc. VAT)
ALF3007 3/4Buna-N3/4"1/2"£58.16
ALF3007 1/2Buna N1/2"3/8"£51.96
WATTS -

3001A Series Dielectric Unions

StyleModelGasket MaterialInlet SizeOutlet SizePrice (inc. VAT)
A3001A 1 1/4Buna-N1-1/4"1-1/4"£58.85
B3001A 1 1/2Buna-N1-1/2"1-1/2"£100.39
B3001A 2Buna-N2"2"£124.09
B3001A 1/2Buna N1/2"-£20.03
RFQ
StyleModelItemPipe SizePrice (inc. VAT)
ALF3110 2 1/2Dielectric Flange2.5"£543.84
ALF3110 3Dielectric Flange3"£527.39
ALF3110-LF 3Pipe Fitting-£747.29
RFQ
WATTS -

RK-3000 Series Dielectric Union Repair Kit

StyleModelItemPrice (inc. VAT)
AKIT GB-EGasket Kit£26.97
BKIT GA-HGasket Kit£6.83
CKIT GB-FGasket Kit£42.15
DKIT GB-CGasket Kit£16.34
EKIT GA-BGasket Kit£4.67
FKIT GA-FGasket Kit£11.02
GKIT GA-PGasket Kit£37.23
HKIT GA-QGasket Kit£42.55
IKIT GA-MGasket Kit£16.34
JKIT GA-EGasket Kit£8.73
KKIT GA-DGasket Kit£8.36
LKIT GB-BGasket Kit£13.69
MKIT GA-RGasket Kit£37.23
NKIT GA-GGasket Kit£6.08
OKIT GA-AGasket Kit£5.67
PKIT GB-AGasket Kit£12.16
QKIT GA-CGasket Kit£6.83
RKIT GA-JGasket Kit£6.83
SKIT GA-LGasket Kit£12.91
TKIT GB-DGasket Kit£22.05
UINK-C-KITInsulator Kit£6.83
VINK-A-KITInsulator Kit£6.08
WINK-J-KITInsulator Kit£44.06
XINK-B-KITInsulator Kit£6.08
YINK-F-KITInsulator Kit£9.10
WATTS -

LF3100 Series Dielectric Unions

StyleModelInlet SizeOutlet SizePrice (inc. VAT)
ALF3100M3 2 1/22 1/2"2-1/2"£452.84
RFQ
BLF3100M3 33"3"£621.10
RFQ
CLF3100M3 44"4"£1,643.87
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.

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