Featured Categories

  • Tools & Machining
  • Shipping, Packaging & Office Supplies
  • Plumbing
  • Safety

Shop Categories

  • Abrasives & Polishers
  • Adhesives & Tapes
  • Electrical Supplies
  • Electronics
  • Fasteners
  • Food Service & Restaurant Supplies
  • Furniture, Linens & Decor
  • Grounds & Outdoor
  • Hardware & Building Materials
  • Heating & Cooling
  • Janitorial & Cleaning Supplies
  • Lab Equipment & Supplies
  • Lighting
  • Material Handling
  • Medical & Personal Care
  • Paint, Coatings & Supplies
  • Plumbing
  • Power Transmission
  • Pumps
  • Raw Materials
  • Safety
  • Shipping, Packaging & Office Supplies
  • Storage & Workspace
  • Test Instruments & Gauges
  • Tools & Machining
  • Vehicle Maintenance
  • Welding, Soldering & Brazing
  • About Us
  • Promo Codes
  • Contact Us
Added to Cart
Skip to Main Content
FREE Shipping on orders over $50 after you . Restrictions Apply
Zoro Homepage
Close icon
Clipboard Icon Clipboard Icon Quick Order
Cart Icon
0
Cart Icon
0
Cart
  • Low prices on everyday needs. Shop Zoro Select
  • Don't miss these limited time offers. Shop All Deals
  • Get 30 days to pay with Net 30. Apply Now
  1. Home
  2. /
  3. Plumbing
  4. /
  5. Pipes, Valves & Fittings
  6. /
  7. Fittings
  8. /
  9. Dielectric Unions
Search Feedback

Dielectric Unions (332 items)

Zoro Select Dielectric Union, 250 psi Max. Pressure ez-20503
Zoro Select

Dielectric Union, 250 psi Max. Pressure

Zoro # G4839322
Mfr # ez-20503
product price:  $8.15
/ea
Legend Valve 1" T-578 DIELECTRIC COUPLING 301-535
Legend Valve

1" T-578 DIELECTRIC COUPLING

Zoro # G1764280
Mfr # 301-535
product price:  $25.29
/ea
Viega Viega ProPress di-electric union, 2" x 2" 79180
Viega

Viega ProPress di-electric union, 2" x 2"

Zoro # G1044653
Mfr # 79180
product price:  $185.99
/ea
Legend Valve 3/4" T-573 NL DIELECTRIC UNION 301-324NL
Legend Valve

3/4" T-573 NL DIELECTRIC UNION

Zoro # G1840434
Mfr # 301-324NL
product price:  $19.25
/ea
Viega Viega ProPress di-electric union, 3/4" x 3/4" 79160
Viega

Viega ProPress di-electric union, 3/4" x 3/4"

Zoro # G2459484
Mfr # 79160
product price:  $68.49
/ea
Watts Dielectric Union, 2 In, FIP x FBP, 250 psi 2 LF3003
Watts

Dielectric Union, 2 In, FIP x FBP, 250 psi

Zoro # G4528377
Mfr # 2 LF3003
product price:  $222.99
/ea
Zoro Select Dielectric Union, 1 1/2 In, FIP x Solder 168-007NL
Zoro Select

Dielectric Union, 1 1/2 In, FIP x Solder

Zoro # G3377184
Mfr # 168-007NL
product price:  $29.69
/ea
Legend Valve 2-1/2 NL FXS T-571 DIEL. UNIO 301-119NL
Legend Valve

2-1/2 NL FXS T-571 DIEL. UNIO

Zoro # G1800236
Mfr # 301-119NL
product price:  $163.99
/ea
Viega Viega ProPress di-electric union, 1" x 1" 79165
Viega

Viega ProPress di-electric union, 1" x 1"

Zoro # G2824875
Mfr # 79165
product price:  $87.69
/ea
Legend Valve 2"FXS T571 NO LEAD DI UNION 301-108NL
Legend Valve

2"FXS T571 NO LEAD DI UNION

Zoro # G1791556
Mfr # 301-108NL
product price:  $31.15
/ea
Legend Valve 3"FXS T571 NL DIELECTRIC UNION 301-120NL
Legend Valve

3"FXS T571 NL DIELECTRIC UNION

Zoro # G1799247
Mfr # 301-120NL
product price:  $192.99
/ea
Legend Valve 3/4" T-578 DIELECTRIC COUPLING 301-534
Legend Valve

3/4" T-578 DIELECTRIC COUPLING

Zoro # G1804670
Mfr # 301-534
product price:  $19.49
/ea
Legend Valve 1-1/2" D.U. STEAM GASKET 301-437
Legend Valve

1-1/2" D.U. STEAM GASKET

Zoro # G1768410
Mfr # 301-437
product price:  $4.45
/ea
Sold in mult. of 3 for $13.35
Watts Dielectric Union, 3/4In, FIPxSolder, 250psi 3/4 LF 3001A-3/4"
Watts

Dielectric Union, 3/4In, FIPxSolder, 250psi

Zoro # G1311597
Mfr # 3/4 LF 3001A-3/4"
product price:  $25.17
/ea
Watts Dielectric Flange, 2-1/2 In, FIP, 175 psi 3200 21/2"
Watts

Dielectric Flange, 2-1/2 In, FIP, 175 psi

Zoro # G1999164
Mfr # 3200 21/2"
product price:  $263.99
/ea
Watts Dielectric Union, 3/4In, FBPxSolder, 250psi 3/4 LF3008
Watts

Dielectric Union, 3/4In, FBPxSolder, 250psi

Zoro # G4540706
Mfr # 3/4 LF3008
product price:  $53.49
/ea
Watts Dielectric Union, 1/2 In, FIP, 250 psi 1/2 LF 3004-1/2
Watts

Dielectric Union, 1/2 In, FIP, 250 psi

Zoro # G0607713
Mfr # 1/2 LF 3004-1/2
product price:  $33.89
/ea
Legend Valve 3/4" D.U. STEAM GASKET 301-434
Legend Valve

3/4" D.U. STEAM GASKET

Zoro # G1802345
Mfr # 301-434
product price:  $2.15
/ea
Sold in mult. of 6 for $12.90
Viega Viega ProPress di-electric union, 1-1/2" x 1-1/2" 79175
Viega

Viega ProPress di-electric union, 1-1/2" x 1-1/2"

Zoro # G2316666
Mfr # 79175
product price:  $129.99
/ea
Watts Dielectric Flange, 2-1/2 In, FIP x Solder 2 1/2 LF3100
Watts

Dielectric Flange, 2-1/2 In, FIP x Solder

Zoro # G4636082
Mfr # 2 1/2 LF3100
product price:  $445.99
/ea
Legend Valve 3/4" FNPT x PRESS P-571NL DU 301-104PNL
Legend Valve

3/4" FNPT x PRESS P-571NL DU

Zoro # G1806195
Mfr # 301-104PNL
product price:  $22.45
/ea
Watts Dielectric Union, 3/4In, FIP x FBP, 250 psi 3/4 LF3003
Watts

Dielectric Union, 3/4In, FIP x FBP, 250 psi

Zoro # G4608895
Mfr # 3/4 LF3003
product price:  $46.19
/ea
Viega Viega ProPress di-electric union, 1/2" x 1/2" 79155
Viega

Viega ProPress di-electric union, 1/2" x 1/2"

Zoro # G1037066
Mfr # 79155
product price:  $58.89
/ea
Watts Dielectric Union, 1/2In, FIPxSolder, 250psi 1/2 LF 3001A-1/2"
Watts

Dielectric Union, 1/2In, FIPxSolder, 250psi

Zoro # G3334807
Mfr # 1/2 LF 3001A-1/2"
product price:  $24.50
/ea
Watts Dielectric Union, 1-1/4 In, FIP, 250 psi 1 1/4 LF3004
Watts

Dielectric Union, 1-1/4 In, FIP, 250 psi

Zoro # G4559676
Mfr # 1 1/4 LF3004
product price:  $73.69
/ea
Watts Dielectric Union, 1 In, FIP, 250 psi 1 LF3006
Watts

Dielectric Union, 1 In, FIP, 250 psi

Zoro # G5397524
Mfr # 1 LF3006
product price:  $39.39
/ea
Watts Dielectric Union, 1-1/2 In, FIPxFBP, 250psi 1 1/2 LF3003
Watts

Dielectric Union, 1-1/2 In, FIPxFBP, 250psi

Zoro # G4581071
Mfr # 1 1/2 LF3003
product price:  $172.99
/ea
Legend Valve 1" T-573 NL DIELECTRIC UNION 301-325NL
Legend Valve

1" T-573 NL DIELECTRIC UNION

Zoro # G1790725
Mfr # 301-325NL
product price:  $31.55
/ea
Watts Dielectric Union, 2In, FIP x Solder, 250psi 2 LF 3001A-2"
Watts

Dielectric Union, 2In, FIP x Solder, 250psi

Zoro # G0825903
Mfr # 2 LF 3001A-2"
product price:  $180.54
/ea
Smith-Cooper MIPXC Dielectric Union, NL 1" 4347004220
Smith-Cooper

MIPXC Dielectric Union, NL 1"

Zoro # G6776329
Mfr # 4347004220
product price:  $14.59
/ea
Legend Valve 2" T-578 DIELECTRIC COUP. 301-538
Legend Valve

2" T-578 DIELECTRIC COUP.

Zoro # G1788887
Mfr # 301-538
product price:  $56.25
/ea
Watts Dielectric Union, 1-1/4 In, FIPxFBP, 250psi 11/4 LF3003
Watts

Dielectric Union, 1-1/4 In, FIPxFBP, 250psi

Zoro # G5365342
Mfr # 11/4 LF3003
product price:  $104.99
/ea
Jomar Valve Dielectric Union Galv., FIPxFIP, 3/4" DU
Jomar Valve

Dielectric Union Galv., FIPxFIP, 3/4"

Zoro # G7077150
Mfr # DU
product price:  $14.99
/ea
Watts Dielectric Union, 1-1/4 In, FIP x Solder 11/4 LF 3001A-1 1/4"
Watts

Dielectric Union, 1-1/4 In, FIP x Solder

Zoro # G3380063
Mfr # 11/4 LF 3001A-1 1/4"
product price:  $84.61
/ea
Legend Valve 3/4" FXS T571 NO LEAD DI UNION 301-104NL
Legend Valve

3/4" FXS T571 NO LEAD DI UNION

Zoro # G1807890
Mfr # 301-104NL
product price:  $7.55
/ea
Sold in mult. of 2 for $15.10
Zoro Select Dielectric Union, 3/4 In, FIP x Solder 168-004NL
Zoro Select

Dielectric Union, 3/4 In, FIP x Solder

Zoro # G1680664
Mfr # 168-004NL
product price:  $6.89
/ea
Dielectric Unions (332 items)
  • 1
    of 10 pages
  • Next
  • Last

About Dielectric Unions

Dielectric Unions are an important conduit fitting used to connect different types of pipes together. They provide a secure and reliable connection between two pieces of piping, preventing corrosion or other damage that could be caused by dissimilar materials coming into contact with one another.

Types of Dielectric Unions

Dielectric Unions come in a variety of sizes and shapes to fit the needs of any job. Depending on the application, they may include dielectric nipples or unions, dielectric pipe couplings, stainless steel to brass dielectric unions, and sharkbite dielectric unions. Each type is designed for specific applications, so it’s important to choose the right one for your project.

How Dielectric Unions are Made

Dielectric Unions are made from a variety of materials such as brass, copper, steel, and plastic. The union consists of two end fittings that are connected by a nut and washer assembly which creates a tight seal between the two pipes when tightened. This prevents any current from passing through the joint.

Industries that use Dielectric Unions

Dielectric Unions are commonly used in plumbing, gas piping, electrical conduit installation and many other industries where connections need to be made between two different types of material. Professionals must know when to use them in order to ensure proper installation and prevent leaks or damage.

Find the Dielectric Unions You Need at Zoro

Looking for a specific item? Use our robust search tool to find it by name or keyword, or use our handy filters to narrow down our full assortment. You can also check out our whole selection of plumbing tools & supplies, along with other equipment and essentials to ensure you have all you need to tackle the job, especially if you're taking on a DIY project for the first time.
Plus, when you shop at Zoro, you'll always enjoy competitive prices on tons of great brands you know and trust. We make the shopping experience as fast and seamless as possible with free shipping on orders over $50 for registered users, Net 30 payment terms for qualifying customers, and an unparalleled customer service experience.

Related Categories

Copper FittingsBlack Pipe FittingsBrass Pipe FittingsPVC Pipe FittingsBall Valves
Press-Fit Tube FittingsCheck ValvesBlack PipesWater ConnectorsRelief Valves
1-1/4 union1 1 2 dielectric union1/2" dielectric union2" dielectric union11/4 union
1" dielectric coupling2" epdm gasket2 inch dielectric union1 1/2 die2-1/2 union

Sign Up & Save

Take 10% off your next order when you sign up for Zoro emails. Subscribe now to receive your promo code via email.

Follow Us

  • Facebook
  • YouTube
  • LinkedIn
  • Instagram
Every Part Plays a Part

Information

  • About Us
  • Accessibility
  • Careers
  • Inclusion
  • Giving Back
  • Resource Hub
  • Returns
  • Shipping

Shopping

  • Brands
  • Collections
  • My Account
  • Payments
  • Promo Codes
  • Sitemap
  • Track My Order

Services

  • Customer Service
  • FAQs
  • Net 30 Terms
  • Reseller Program
  • Sell on Zoro
  • Participate in Research

Zoro, Inc

Connect

Customer Service From Real People

  • Phone: (855) 289-9676
  • Contact Us

© 2011-2026 Zoro Tools, Inc. All rights reserved.
  • Terms & Conditions
  • Terms of Access
  • Privacy Policy
Zoro, Inc