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- Plumbing
- Pipe Fittings and Couplings
- Dielectric Unions
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
Used with water heaters for separating two metal pipes of different materials and to prevent galvanic corrosion. Available in different connection types
<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>
A| Style | Model | Inlet Size | Outlet Size | Insulation Material | Adapter Material | Gasket Material | Inlet Material | Inlet Type | Lead | Price (ex. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LF3005A 1/2 | €27.72 | |||||||||
| A | LF3005A 3/4 | €26.40 |
LF3100 Series, Dielectric Flange, FIP x Solder
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C| Style | Model | Pipe Size | Max. Pressure | Connection Type | Body Material | Gasket Material | Max. Temp. | Price (ex. VAT) | |
|---|---|---|---|---|---|---|---|---|---|
| A | 2 1/2 LF3100 | €379.44 | |||||||
| B | 2 LF 3100 2" | €352.09 | |||||||
| C | 3 LF3100 | €479.15 |
A| Style | Model | Pipe Size | Hex Size | Connection Type | Gasket Material | Max. Pressure | Max. Temp. | Nut Material | Price (ex. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|
| A | 1/2 LF 3005-1/2A | €17.85 | ||||||||
| A | 3/4 LF 3005-3/4A | €22.29 |
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.
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.
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E| Style | Model | Pipe Size | Body Material | Nut Material | Hex Size | Adapter Material | Inlet Material | Inlet Size | Outlet Material | Price (ex. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LF3004 1 1/4 | €96.89 | |||||||||
| B | LF3004 1 1/2 | €147.25 | |||||||||
| B | LF3004 1 | €72.66 | |||||||||
| B | LF3004 1/2 | €48.42 | |||||||||
| A | LF3004 3/4 | €55.22 | |||||||||
| C | 11/2 LF3004 | €88.26 | |||||||||
| A | 1 1/4 LF3004 | €67.24 | |||||||||
| D | 1 LF 3004-1 | €89.62 | |||||||||
| D | 1/2 LF 3004-1/2 | €46.12 | |||||||||
| E | LF3004 2 | €140.71 | |||||||||
| D | 3/4 LF 3004 3/4 | €52.59 |
LF3002 Series Dielectric Unions
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B| Style | Model | Pipe Size | Connection Type | Insulation Material | Body Material | Gasket Material | Max. Pressure | Nut Material | Adapter Material | Price (ex. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LF3002 3/4 | €46.98 | |||||||||
| B | LF3002 1 | €33.05 |
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.
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.
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D| Style | Model | Pipe Size | Nut Material | Hex Size | Adapter Material | Inlet Material | Inlet Size | Outlet Size | Insulation Material | Price (ex. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LF3003 1 1/4 | €183.06 | |||||||||
| B | LF3003 2 | €334.21 | |||||||||
| C | LF3003 1 1/2 | €157.28 | |||||||||
| D | 11/4 LF3003 | €111.13 | |||||||||
| C | LF3003 1 | €61.09 | |||||||||
| C | LF3003 1/2 | €38.98 | |||||||||
| C | 2 LF3003 | €186.30 | |||||||||
| C | LF3003 3/4 | €47.33 |
LF3008 Series Dielectric Unions
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C| Style | Model | Pipe Size | Hex Size | Connection Type | Body Material | Insulation Material | Gasket Material | Max. Pressure | Nut Material | Price (ex. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LF3008 3/4 | €68.78 | |||||||||
| B | LF3008 1 | €64.45 | |||||||||
| C | LF3008 1/2 | €47.86 | |||||||||
| C | 3/4 LF3008 | €56.42 |
Gasket Kits
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ILF301 Series Dielectric Unions
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B| Style | Model | Inlet Size | Outlet Size | Insulation Material | Max. Working Pressure | Adapter Material | Gasket Material | Inlet Material | Inlet Type | Price (ex. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LF301 1 1/2 | €42.88 | |||||||||
| A | LF301 1 1/4 | €28.17 | |||||||||
| A | LF301 1 | €18.33 | |||||||||
| B | LF301 1/2 | €11.33 | |||||||||
| A | LF301 2 | €59.56 | |||||||||
| A | LF301 3/4 | €11.38 |
RK-3000 Series Dielectric Union Repair Kit
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Y| Style | Model | Kit Contents | Kit Type | Ada Compliant | Price (ex. VAT) | |
|---|---|---|---|---|---|---|
| A | KIT GA-H | €8.03 | ||||
| B | KIT GB-C | €19.19 | ||||
| C | KIT GB-E | €31.67 | ||||
| D | KIT GB-F | €49.50 | ||||
| E | KIT GA-J | €8.03 | ||||
| F | KIT GA-D | €9.82 | ||||
| G | KIT GB-D | €25.90 | ||||
| H | KIT GA-C | €8.03 | ||||
| I | KIT GA-G | €7.14 | ||||
| J | KIT GB-A | €14.28 | ||||
| K | KIT GA-A | €6.66 | ||||
| L | KIT GA-F | €12.94 | ||||
| M | KIT GA-L | €15.17 | ||||
| N | KIT GA-B | €5.49 | ||||
| O | KIT GA-P | €43.72 | ||||
| P | KIT GA-R | €43.72 | ||||
| Q | KIT GA-Q | €49.98 | ||||
| R | KIT GA-M | €19.19 | ||||
| S | KIT GA-E | €10.25 | ||||
| T | KIT GB-B | €16.08 | ||||
| U | INK-A-KIT | €7.14 | ||||
| V | INK-G-KIT | €9.37 | ||||
| W | INK-E-KIT | €9.37 | ||||
| X | INK-H-KIT | €10.69 | ||||
| Y | INK-F-KIT | €10.69 |
LF4001E Series Dielectric Unions
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C| Style | Model | Inlet Size | Nut Material | Outlet Size | Insulation Material | Max. Working Pressure | Adapter Material | Gasket Material | Inlet Material | Price (ex. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LF4001E 1 1/2 | €180.16 | |||||||||
| A | LF4001E 1 1/4 | €123.98 | |||||||||
| A | LF4001E 1 | €76.04 | |||||||||
| A | LF4001E 1/2 | €34.38 | |||||||||
| B | LF4001E 2 | €252.83 | |||||||||
| C | LF4001E 3/4 | €34.38 |
LF3001A Series Dielectric Unions
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C| Style | Model | Pipe Size | Hex Size | Inlet Size | Nut Material | Outlet Size | Connection Type | Insulation Material | Max. Working Pressure | Price (ex. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LF3001A 1 | €50.53 | |||||||||
| A | LF3001A 2 | €177.41 | |||||||||
| A | LF3001A 1 1/2 | €143.51 | |||||||||
| A | LF3001A 1 1/4 | €84.28 | |||||||||
| B | LF3001A 1/2 | €30.02 | |||||||||
| A | LF3001A 3/4 | €28.51 | |||||||||
| C | 11/2 LF 3001A-1 1/2" | €76.16 | |||||||||
| C | 11/4 LF 3001A-1 1/4" | €54.68 | |||||||||
| C | 1 LF 3001A-1" | €33.94 | |||||||||
| C | 1/2 LF 3001A-1/2" | €19.27 | |||||||||
| C | 2 LF 3001A-2" | €100.24 | |||||||||
| C | 3/4 LF 3001A-3/4" | €22.79 |
LF3006 Series Dielectric Unions
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H| Style | Model | Pipe Size | Nut Material | Hex Size | Adapter Material | Inlet Material | Inlet Size | Outlet Material | Outlet Size | Price (ex. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LF3006 2 | €217.97 | |||||||||
| A | LF3006 3/4 | €55.22 | |||||||||
| A | LF3006 1 | €72.66 | |||||||||
| B | LF3006 1/2 | €41.66 | |||||||||
| C | 1 1/2 LF3006 | €87.02 | |||||||||
| D | LF3006 1 1/4 | €60.93 | |||||||||
| E | 1 LF3006 | €44.71 | |||||||||
| F | 1/2 LF3006 | €30.27 | |||||||||
| G | 2 LF3006 | €178.39 | |||||||||
| H | 3/4 LF3006 | €33.89 |
RK-3100/3110/3200 Series Dielectric Union Repair Kit
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D| Style | Model | Kit Contents | Kit Type | Price (ex. VAT) | |
|---|---|---|---|---|---|
| A | INS-KIT 5/8 | €11.16 | |||
| B | INS-KIT 7/8 | €12.48 | |||
| C | INS-KIT 3/4 | €12.48 | |||
| D | INS-KIT 1/2 | €9.82 |
A| Style | Model | Inlet Size | Max. Working Pressure | Gasket Material | Gasket Maximum Pressure | Gasket Maximum Temperature | Inlet Material | Inlet Thread Type | Inlet Type | Price (ex. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 3004 1 1/4 | €79.42 | RFQ | ||||||||
| A | 3004 1/2 | €39.72 | RFQ |
LF3007 Series Dielectric Unions
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B| Style | Model | Inlet Size | Outlet Size | Insulation Material | Max. Working Pressure | Adapter Material | Gasket Material | Inlet Material | Inlet Type | Price (ex. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LF3007 1/2 | €61.02 | |||||||||
| B | LF3007 3/4 | €68.30 |
3001A Series Dielectric Unions
AB| Style | Model | Adapter Material | Inlet Size | Outlet Size | Max. Working Pressure | Insulation Material | Gasket Material | Inlet Material | Inlet Type | Price (ex. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 3001A 1/2 | €23.53 | RFQ | ||||||||
| B | 3001A 1 1/2 | €117.90 | |||||||||
| B | 3001A 1 1/4 | €69.12 | |||||||||
| B | 3001A 2 | €145.74 |
LF3100 Series Dielectric Unions
A
B| Style | Model | Inlet Size | Outlet Size | Max. Working Pressure | Insulation Material | Adapter Material | Gasket Material | Gasket Maximum Pressure | Gasket Maximum Temperature | Price (ex. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LF3100M3 2 1/2 | €531.82 | RFQ | ||||||||
| B | LF3100M3 3 | €729.43 | RFQ | ||||||||
| B | LF3100M3 4 | €1,930.58 | RFQ |
LF3110 Series Dielectric Unions
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B
C| Style | Model | Pipe Size | Connection Type | Body Material | Max. Pressure | Gasket Material | Max. Temp. | Gasket Maximum Pressure | Gasket Maximum Temperature | Price (ex. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LF3110-LF 3 | €877.63 | RFQ | ||||||||
| B | LF3110 2 1/2 | €638.69 | |||||||||
| C | LF3110 3 | €619.37 |
Dielectric Union, 3/4 X 1/2 Inch Size
| Model | Item | Price (ex. VAT) | |
|---|---|---|---|
| LF302 3/4 | BQ6WMB | €15.31 |
Dielectric Union, 3/4 X 1/2 Inch Size
| Model | Item | Price (ex. VAT) | |
|---|---|---|---|
| 3002 3/4 | BR6ZUA | €37.76 | RFQ |
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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