Dielectric Unions

Dielectric unions are used to separate two dissimilar metal pipes (such as copper pipes and galvanized steel). Purpose of dielectric unions is to prevent galvanic corrosion, which is caused by electrolysis.

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Product Description SKU Qty Unit Price
1/2" Dielectric Union (C x F), Lead-Free

Webstone Valves
01102W
x1
$3.75 / each
x10
$35.00
($3.50 / each)
3/4" Dielectric Union (C x F), Lead-Free

Webstone Valves
01103W
x1
$3.35 / each
x10
$32.00
($3.20 / each)
1" Dielectric Union (C x F), Lead-Free

Webstone Valves
01104W
x1
$4.75 / each
x10
$45.00
($4.50 / each)
1-1/4" Dielectric Union (C x F), Lead-Free

Webstone Valves
01105W
x1
$6.75 / each
x10
$64.50
($6.45 / each)
1-1/2" Dielectric Union (C x F), Lead-Free

Webstone Valves
01106W
x1
$10.10 / each
x10
$97.50
($9.75 / each)
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Electrolytic corrosion occurs in plumbing systems that contain dissimilar metals. The process of corrosion is rapid when the water is present in the system, since it acts as a medium between the two metals. The three components: water and two metals, form a "battery", where electric current carries ions from one metal to another, causing it to dissolve. The washer inside the union prevents such current from flowing, thus preventing corrosion itself.

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