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Flat round steel washer with zinc coating and central hole

L.H. DOTTIE

L.H. DOTTIE RW109 Reducing Washer 4 in x 3-1/2 in Steel Zinc

SKU CH-722F-M8AVX

Reducing washer connects 4-inch to 3-1/2-inch conduit in zinc-plated steel

  • Reduces conduit from 4 in to 3-1/2 in
  • Steel construction resists mechanical stress
  • Zinc coating protects against corrosion
  • Fits standard conduit fittings and couplings
  • Model RW109 ensures correct specification match

Conduit Reducing Washer 4 in x 3-1/2 in

This zinc-plated steel reducing washer connects 4-inch conduit to 3-1/2-inch fittings in electrical installations. It is supplied new and intended for trade or DIY use where a secure, code-compliant transition between conduit sizes is required. The DOTTIE RW109 model provides a flat sealing surface for locknuts or couplings.

Zinc-plated steel construction

The zinc coating protects the washer against corrosion in damp or outdoor environments. Steel gives the part enough rigidity to maintain its shape under tightening torque, preventing the deformation that softer metals can suffer. No separate gasket or sealant is included, so the installer must ensure the mating faces are clean for a reliable connection.

Simple slip-on installation

The washer slides over the conduit end before the locknut is tightened, requiring no special tools beyond standard wrenches. The most common issue is misalignment when the conduit is not cut square, which can leave a gap that compromises the seal. Verifying a clean, perpendicular cut avoids rework.

Highlights

  • Reduces conduit from 4 in to 3-1/2 in
  • Steel construction resists mechanical stress
  • Zinc coating protects against corrosion
  • Fits standard conduit fittings and couplings
  • Model RW109 ensures correct specification match

Specifications

BrandDOTTIE

Questions about this item

Does the zinc coating on this reducing washer wear off over time and need replacement?

The zinc-plated steel resists corrosion in normal conduit installations, so the washer does not require scheduled replacement.

What mechanical limit appears first if this washer is left under constant clamp load?

The steel body maintains its shape under normal tightening torque, and no yield point is reached in standard conduit assemblies.

Does the washer generate any noise or heat when conduit vibrates all day?

As a passive metal spacer it produces no noise or heat regardless of vibration duration.

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