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Black elastomeric PVC shielded coupling with stainless steel clamps and shear ring for 3 inch pipe connections

Fernco Inc.

Fernco Inc. 3000-33 Shielded Coupling 3 In

SKU CH-XFJZ-JY1RB

Connects 3-inch cast-iron to plastic or steel DWV pipe with an internal stop, shear ring and clamps meeting ASTM A167-91, rated to 4.3 psi and 180 °F

  • TypeDrain Components
  • MaterialElastomeric PVC
  • Connects cast-iron to plastic or steel without bushings
  • Internal pipe stop ensures correct fit and cuts noise
  • Stainless-steel shear ring and clamps meet ASTM A167-91
  • Withstands 180 °F operating temperature for DWV systems
  • Tested to 4.3 psi and installs at 60 in-lb torque

3-Inch Shielded Coupling for DWV Systems

This Fernco shielded coupling joins 3-inch cast-iron pipe to plastic, steel or extra-heavy cast iron without bushings. An internal pipe stop aligns the joint during assembly and dampens vibration. The elastomeric PVC sleeve and stainless-steel clamp meet ASTM A167-91 requirements for drain-waste-vent installations.

Tested to 4.3 psi at 180 F operating temperature

The coupling withstands 4.3 psi test pressure while handling continuous flow up to 180 F. Clamp torque is set at 60 in-lb to maintain a secure seal without over-tightening the elastomeric sleeve. This combination keeps the joint leak-free under normal DWV pressure and thermal cycling.

Replaces bushing-dependent transitions on 3-inch

Use this coupling when converting existing cast-iron stacks to modern plastic or steel piping without adding separate bushings. The integrated stop and shear ring simplify the retrofit and reduce potential leak paths. Not suited for pressure-rated supply lines or sizes other than the listed 3-inch by 3-inch configuration.

Highlights

  • Connects cast-iron to plastic or steel without bushings
  • Internal pipe stop ensures correct fit and cuts noise
  • Stainless-steel shear ring and clamps meet ASTM A167-91
  • Withstands 180 °F operating temperature for DWV systems
  • Tested to 4.3 psi and installs at 60 in-lb torque

Specifications

TypeDrain Components
MaterialElastomeric PVC
BrandFernco

Questions about this item

How do I install the Fernco 3000-33 shielded coupling and what torque mistake should I avoid?

Slide the coupling over the prepared pipe ends until each reaches the internal stop, then tighten the clamp assemblies to exactly 60 In./Lb. using a calibrated torque wrench; over-tightening can distort the elastomeric PVC sleeve and compromise the seal.

What maintenance or replacement will the Fernco 3000-33 coupling need over time?

Inspect the elastomeric PVC body and stainless clamp assemblies periodically for cracking, corrosion, or loss of elasticity; replace the entire coupling if the material hardens, the shear ring deforms, or leakage appears at the joint.

What is the first performance limit the Fernco 3000-33 coupling reaches under sustained DWV service?

The 4.3 psi test pressure rating is the primary limit; sustained internal pressure above this level can overcome the clamp preload and cause joint separation before temperature or torque limits are reached.

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