Dielectric Unions
Dissimilar Metal Connections
Protect Critical Piping Transitions
Connect Dissimilar Metals. Help Control Galvanic Corrosion.
Dielectric unions electrically isolate dissimilar metals at a piping connection to help reduce galvanic corrosion. They are commonly used where copper piping transitions to steel, galvanized steel or other dissimilar metallic piping and equipment in plumbing, mechanical and hydronic systems.
Why Use One?
Separate Dissimilar Metals
The insulating components interrupt direct electrical contact between dissimilar metallic piping materials.
System Protection
Help Reduce Galvanic Corrosion
Proper dielectric separation helps protect vulnerable transition points where different metals meet.
Connection Options
Threaded, Solder & Press
Shop multiple connection configurations to match copper tube, threaded piping and press-system requirements.
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Dielectric Unions No Lead (FIP x Solder)
Cello
$5.31 - $255.64No Lead Dielectric Unions (FIP x Solder) UNNL-IFX Dielectric Union is a lead-free plumbing fitting designed to electrically isolate dissimilar metal piping (e.g., copper and steel) to prevent... -
Lead-Free Dielectric Unions (MIP x Solder)
ASC
$6.82 - $15.05Lead-Free Dielectric Unions (MIP x Solder) Dielectric unions help prevent galvanic corrosion caused by stray currents or joined pipes made from dissimilar metal. California AB1953 lead-free... -
Dielectric Unions Lead-Free (FIP x FIP)
ASC
$6.25 - $13.15Dielectric Unions Lead-Free (FIP x FIP) Dielectric unions help prevent galvanic corrosion caused by stray currents or joined pipes made from dissimilar metal. Female IPS x Female IPS California... -
Lead Free Brass Dielectric Union, Press x FIP Connection, 250 PSI
Jomar Valve
$21.48 - $121.93Lead Free Brass Dielectric Union, Press x FIP Connection, 250 PSI Features Prevents Accelerated Corrosion EPDM Gasket: -20˚F to 180˚F Wetted Surfaces Contain Less than .25% Lead Content... -
Black Iron FIP x FIP, 250 PSI
Jomar Valve
$10.89 - $87.92Black Iron FIP x FIP, 250 PSI Features Prevents accelerated corrosion For use on black pipe Buna Seats: -20˚F to 180˚F Specification Sheet PDF Certifications: -
Lead Free Brass Dielectric Union, FIP x FIP Connection, 250 PSI
Jomar Valve
$17.54 - $37.45Lead Free Brass Dielectric Union, FIP x FIP Connection, 250 PSI Features Prevents Accelerated Corrosion Buna Seats: -20˚F to 180˚F Wetted Surfaces Contain Less than .25% Lead Content Specification... -
Lead-Free Dielectric Unions (FIP x Solder)
ASC
$6.35 - $902.28Lead-Free Dielectric Unions (FIP x Solder) ASC Series 209FXL Lead-Free Dielectric Unions provide a transition between a female iron pipe threaded connection and a brass solder connection while... -
Galvanized FIP x FIP, 250 PSI
Jomar Valve
$10.29 - $83.34Galvanized FIP x FIP, 250 PSI Features Prevents accelerated corrosion Buna Seats: -20˚F to 180˚F Specification Sheet PDF Certifications: Meets ANSI B16.39 -
Brass Solder x Galvanized FIP 250 PSI
Jomar Valve
$8.71 - $54.08Brass Solder x Galvanized FIP 250 PSI Features Prevents accelerated corrosion Buna Seats: -20˚F to 180˚F Specification Sheet PDF Certifications: Meets ANSI -
Lead Free Dielectric Unions FIP x Solder
Watts
$11.46 - $69.66Lead Free Dielectric Unions FIP x Solder Series LF301 dielectric unions feature a female iron pipe thread to solder connection. These unions are designed between pipe made from dissimilar metals to... -
Lead Free Brass Dielectric Union, Solder x FIP Connection, 250 PSI
Jomar Valve
$10.97 - $74.15Lead Free Brass Dielectric Union, Solder x FIP Connection, 250 PSI Features Prevents Accelerated Corrosion Buna Seats: -20˚F to 180˚F Wetted Surfaces Contain Less than .25% Lead Content... -
Lead Free Brass Dielectric Union, Solder x MIP Connection, 250 PSI
Jomar Valve
$19.85 - $27.84Lead Free Brass Dielectric Union, Solder x MIP Connection, 250 PSI Features Prevents Accelerated Corrosion Buna Seats: -20˚F to 180˚F Wetted Surfaces Contain Less than .25% Lead Content... -
Lead Free Brass Dielectric Union, Press x MIP Connection, 250 PSI
Jomar Valve
$25.46 - $31.29Lead Free Brass Dielectric Union, Press x MIP Connection, 250 PSI Features Prevents Accelerated Corrosion EPDM Gasket: -20˚F to 180˚F Wetted Surfaces Contain Less than .25% Lead Content...