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WATTS Dielectric Unions

Used with water heaters for separating two metal pipes of different materials and to prevent galvanic corrosion. Available in different connection types

1 - 21 of 29 Items (136 Products) Filter

Watts dielectric unions provide insulation between two different materials to prevent electrolysis which may lead to corrosion or pipe failure. Series LF3100 unions feature a female iron pipe...Read more
WATTS -

LF3100 Series Dielectric Unions

StyleModelInlet SizeOutlet SizePrice
ALF3100M3 2 1/22 1/2"2-1/2"€439.52
RFQ
BLF3100M3 33"3"€602.83
RFQ
CLF3100M3 44"4"€1,595.52
RFQ
StyleModelPrice
ALF3002 1€27.31
ALF3002 3/4€38.83
WATTS -

LF4001E Series Dielectric Unions

StyleModelGasket MaterialInlet SizeOutlet SizePrice
ALF4001E 2Buna-N2-1/2"2-1/2"€208.95
BLF4001E 3/4Buna-N3/4"3/4"€28.41
BLF4001E 1 1/2Buna N1 1/2"1-1/2"€148.90
BLF4001E 1/2Buna N1/2"1/2"€28.41
BLF4001E 1Buna N1"1"€62.85
BLF4001E 1 1/4Buna N1 1/4"1-1/4"€102.47
WATTS -

LF3001A Series Dielectric Unions

StyleModelGasket MaterialHex SizeInlet SizeOutlet SizePipe SizePrice
A3/4 LF 3001A-3/4"Buna-N1.625"--3/4"€18.83
A11/4 LF 3001A-1 1/4"Buna-N2.25"--1.25"€45.19
A2 LF 3001A-2"Buna-N3.5"--2"€82.84
BLF3001A 2Buna-N-2"2"-€146.62
CLF3001A 1 1/4Buna-N-1-1/4"1-1/4"-€69.66
CLF3001A 3/4Buna-N-3/4"3/4"-€23.56
CLF3001A 1Buna-N-1"1"-€41.76
A1/2 LF 3001A-1/2"Buna-N1.5"--1/2"€15.93
D1 LF 3001A-1"Buna-N1.875"--1"€28.05
D11/2 LF 3001A-1 1/2"Buna-N2.75"--1.5"€62.94
BLF3001A 1 1/2Buna-N-1-1/2"1-1/2"-€118.60
CLF3001A 1/2Buna N-1/2"1/2"-€24.81
WATTS -

LF3006 Series Dielectric Unions

StyleModelBody MaterialGasket MaterialHex SizeInlet MaterialInlet SizeOutlet MaterialOutlet SizePipe SizePrice
ALF3006 2-Buna-N-Malleable Iron2"Malleable Iron2"-€180.14
ALF3006 1-Buna-N-Steel1"Steel1"-€60.05
ALF3006 3/4-Buna-N-Steel3/4"Steel3/4"-€45.64
ALF3006 1/2-Buna N-Malleable Iron1/2"Malleable Iron--€34.43
B2 LF3006Black Malleable IronBuna-N4.125"----2"€147.43
C1 1/2 LF3006Black Malleable IronBuna-N3.5"----1.5"€71.92
D1/2 LF3006Malleable IronBuna-N1.625"----1/2"€25.01
E1 LF3006Malleable IronBuna-N2.25"----1"€36.95
F3/4 LF3006Malleable IronBuna-N1.875"----3/4"€28.01
ALF3006 1 1/4Malleable IronBuna-N2.75"----1.25"€50.36
StyleModelInlet SizeOutlet SizePrice
ALF301 11"1"€15.15
ALF301 1 1/21-1/2"1-1/2"€35.44
ALF301 1 1/41-1/4"1-1/4"€23.28
ALF301 1/21/2"1/2"€9.37
ALF301 22"2"€49.22
ALF301 3/43/4"3/4"€9.41
WATTS -

Gasket Kits

StyleModelPrice
AKIT GB-G€13.29
BKIT GB-H€13.29
CKIT GB-K€21.40
DKIT GB-L€26.18
EKIT GB-M€40.91
FKIT GB-N€39.07
GKIT GB-R€75.60
HKIT GB-Q€48.29
IKIT GB-P€45.74
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
ALF3004 1 1/4-Buna-N-Steel1-1/4"Steel1-1/4"-€80.07
ALF3004 1/2-Buna N-Steel1/2"Steel1/2"-€40.02
ALF3004 3/4-Buna-N-Steel3/4"Steel3/4"-€45.64
ALF3004 1 1/2-Buna N-Malleable Iron1 1/2"Malleable Iron1-1/2"-€121.69
ALF3004 1-Buna N-Steel1"Steel1"-€60.05
B11/2 LF3004Galvanized Malleable IronBuna-N3.5"----1.5"€72.94
ALF3004 2Galvanized Malleable IronBuna-N4.125"----2"€116.29
C1 1/4 LF3004IronBuna-N2.75"----1.25"€55.57
D1/2 LF 3004-1/2Malleable Iron and Galvanized SteelBuna-N1.625"----1/2"€38.12
D3/4 LF 3004 3/4Malleable Iron and Galvanized SteelBuna-N1.875"----3/4"€43.46
E1 LF 3004-1Malleable Iron and Galvanized SteelBuna-N2.25"----1"€74.06
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
ALF3003 2-Buna N-Malleable Iron2"2"-€276.21
ALF3003 1 1/4-Buna-N-Steel1-1/4"1-1/4"-€151.29
B2 LF3003Lead Free Brass and Malleable IronBuna-N4.125"---2"€153.97
ALF3003 1 1/2Lead Free Brass and Malleable IronBuna-N3.5"---1.5"€129.99
ALF3003 3/4Lead Free Brass and SteelBuna-N1.875"---3/4"€39.12
ALF3003 1Lead Free Brass and SteelBuna-N2.25"---1"€50.49
C11/4 LF3003Lead Free Brass and SteelBuna-N2.75"---1.25"€91.84
ALF3003 1/2Lead Free Brass and SteelBuna-N1.625"---1/2"€32.22
WATTS -

3001A Series Dielectric Unions

StyleModelGasket MaterialInlet SizeOutlet SizePrice
A3001A 1 1/2Buna-N1-1/2"1-1/2"€97.44
B3001A 1 1/4Buna-N1-1/4"1-1/4"€57.12
A3001A 2Buna-N2"2"€120.44
A3001A 1/2Buna N1/2"-€19.44
RFQ
WATTS -

LF3008 Series Dielectric Unions

StyleModelHex SizePipe SizePrice
ALF3008 3/4--€56.85
ALF3008 1/21.5"1/2"€39.56
B3/4 LF30081.625"3/4"€46.63
ALF3008 11.875"1"€53.26
StyleModelInlet SizeOutlet SizePrice
ALF3005A 1/21/2"1/2"€22.91
ALF3005A 3/43/4"3/4"€21.82
WATTS -

Dielectric Union, MIP x Solder

StyleModelHex SizePipe SizePrice
A1/2 LF 3005-1/2A1.5"1/2"€14.75
B3/4 LF 3005-3/4A1.625"3/4"€18.42
APPROVED VENDOR -

Dielectric Union, FIP x Solder

StyleModelPipe SizePrice
A168-005NL1"€27.69
B168-007NL1.5"€64.78
C2TEZ91/2"€13.83
D2TFA13/4"€15.06
WATTS -

LF3100 Series, Dielectric Flange, FIP x Solder

StyleModelBody MaterialMax. PressurePipe SizePrice
A2 1/2 LF3100Copper and Iron175 psi2.5"€313.59
B3 LF3100Copper and Iron175 psi3"€395.99
C2 LF 3100 2"Malleable Iron and Brass250 psi2"€290.98
ZURN -

DUXLC Dielectric Pipe Fittings

ZURN -

DUXL Dielectric Pipe Fittings

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

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

StyleModelPrice
AINS-KIT 7/8€10.32
BINS-KIT 1/2€8.12
CINS-KIT 5/8€9.23
DINS-KIT 3/4€10.32
StyleModelItemPipe SizePrice
ALF3110 2 1/2Dielectric Flange2.5"€527.85
ALF3110 3Dielectric Flange3"€511.87
ALF3110-LF 3Pipe Fitting-€725.31
RFQ
WATTS -

RK-3000 Series Dielectric Union Repair Kit

StyleModelItemPrice
AKIT GA-HGasket Kit€6.63
BKIT GA-PGasket Kit€36.14
CKIT GA-AGasket Kit€5.50
DKIT GA-LGasket Kit€12.53
EKIT GA-GGasket Kit€5.90
FKIT GB-AGasket Kit€11.80
GKIT GA-BGasket Kit€4.53
HKIT GA-FGasket Kit€10.69
IKIT GB-CGasket Kit€15.86
JKIT GA-RGasket Kit€36.14
KKIT GB-BGasket Kit€13.29
LKIT GA-QGasket Kit€41.30
MKIT GB-DGasket Kit€21.40
NKIT GB-EGasket Kit€26.18
OKIT GB-FGasket Kit€40.91
PKIT GA-JGasket Kit€6.63
QKIT GA-MGasket Kit€15.86
RKIT GA-DGasket Kit€8.12
SKIT GA-CGasket Kit€6.63
TKIT GA-EGasket Kit€8.47
UINK-H-KITInsulator Kit€8.83
VINK-E-KITInsulator Kit€7.74
WINK-F-KITInsulator Kit€8.83
XINK-G-KITInsulator Kit€7.74
YINK-B-KITInsulator Kit€5.90
StyleModelInlet SizePrice
A3004 1 1/41 1/4"€65.64
RFQ
A3004 1/21/2"€32.83
RFQ
12

Features

  • These unions are ideal for hot water storage tanks, water & air conditioners, steam, gas and water piping.
  • They are made of iron / brass / copper / steel for easy connection between two different pipes to prevent leakage, corrosion or deterioration in the piping system due to galvanic and stray current.
  • They are integrated with a Buna-N gasket for preventing the occurrence of electric current through the pipes.
  • They withstand a pressure rating of 175 / 250 psi and have a maximum temperature rating of 180 degrees F.

Frequently Asked Questions

Can a dielectric union be used between stainless steel and copper pipes?

When copper is used with carbon steel or galvanised steel, dielectric unions must be used to electrically insulate each material. But when copper is connected with stainless steel, a brass / bronze fitting can provide sufficient electrical separation between the two materials.

How does the dielectric union break continuity?

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

How to install the Watts dielectric union?

  • Wrap several layers of sealing tape over the threads of the steel pipe.
  • Install the threaded end of the dielectric union to the steel pipe and turn it clockwise with the help of a pipe wrench.
  • Next, slide the union nut over the end of the copper pipe with an open threaded end facing out. Also, slide 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.
  • Slide the rubber gasket between the union nut and the union body and assemble it.
  • Inspect to ensure a watertight connection.

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