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Watts 3002 brass and steel dielectric coupling with zinc plating

Watts

Watts 3002 Dielectric Straight Coupling 3/4x1/2

SKU CH-V2T9-YFX90

Connects dissimilar metals to prevent galvanic corrosion in plumbing systems

  • Prevents galvanic corrosion with dielectric insulator
  • Handles 250 psi maximum operating pressure
  • Operates from 33 to 180 degrees F
  • Brass and zinc-plated steel construction
  • 3002 model straight coupling design

Dielectric Straight Coupling 3002

The Watts 3002 dielectric straight coupling joins a 3/4 inch female threaded brass end to a 1/2 inch female socket steel end. It isolates dissimilar metals in plumbing systems to prevent galvanic corrosion. The insulator uses polysulfone and the gasket uses NBR for reliable sealing. This new fitting suits installers needing a direct transition between threaded and socket connections.

Pressure and Temperature Headroom

Rated for 250 psi maximum operating pressure, the coupling handles typical residential and light commercial water pressures with margin. The operating temperature range spans 33 to 180 degrees F, covering cold-water lines and standard hot-water distribution. Systems exceeding either limit will require a different fitting class or additional protection.

Threaded-to-Socket Interface Limits

The 3/4 inch female thread and 1/2 inch female socket define the connection options; no other pipe sizes or end types are supported by this model. The overall length is 1 7/8 inches, which sets the installed space requirement. Installers must verify that the mating pipe threads and socket dimensions match these exact specifications before assembly.

How it compares

Measured against everything we stock in Hose Fittings, Adapters & Clamps, at today’s prices. Recalculated every night.

Price $16.99
Typical for this category: the median of 2,955 items is $17.99.

Specifications

Product
Brand nameWATTS

Questions about this item

Will the 3/4 in female threaded end of the Watts 3002 coupling join my existing 3/4 in steel pipe without a new thread sealant?

The brass female NPT thread mates with standard 3/4 in pipe threads; apply your usual thread sealant or tape for a leak-free joint.

How can I confirm the dielectric barrier is intact after I install the Watts 3002 coupling?

With water pressurised up to 250 psi the joint should hold without leakage, and a multimeter across the brass and steel ends will show an open circuit.

Does the Watts 3002 package include the 1/2 in socket-weld pipe or any gasket lubricant?

The box contains only the coupling body with its built-in polysulfone insulator and NBR gasket; pipe and lubricant are purchased separately.

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