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Stainless steel 4 inch no hub coupling with clamps

Legend Valve

Legend Valve 303-421 4 inch heavy duty no hub coupling accessory

SKU CH-XZQ5-8MNP9

4-inch heavy-duty no-hub coupling joins pipes securely in plumbing systems

  • Heavy-duty coupling secures 4 inch no-hub pipe joints
  • Legend Valve brand trusted by plumbing professionals
  • Model 303-421 identifies exact replacement part
  • New condition ensures full performance from first use
  • California Proposition 65 warning notes chemical safety disclosure

4 inch no hub coupling

The Legend Valve 303-421 is a 4 inch heavy duty no hub coupling designed for joining no hub soil pipe and fittings in drainage, waste and vent systems. It suits professional plumbers and maintenance teams who need a reliable mechanical joint without hubbed connections.

Stainless shield and clamp assembly

The coupling uses a heavy duty stainless steel shield and clamp arrangement that tightens around the pipe ends to create a secure seal. The design allows for straightforward installation with standard hand tools and accommodates the slight dimensional variations common in cast iron and plastic no hub pipe.

Verify pipe compatibility and local code

Before ordering confirm that the existing pipe is true no hub type and that the 4 inch nominal size matches the system you are repairing or extending. Check local plumbing codes for any restrictions on mechanical couplings in the intended application and note the Proposition 65 warning regarding chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Highlights

  • Heavy-duty coupling secures 4 inch no-hub pipe joints
  • Legend Valve brand trusted by plumbing professionals
  • Model 303-421 identifies exact replacement part
  • New condition ensures full performance from first use
  • California Proposition 65 warning notes chemical safety disclosure

Specifications

BrandLEGEND VALVE

Questions about this item

What pipe size does the 303-421 no hub coupling connect?

The 303-421 model is a 4 inch heavy duty no hub coupling designed to join pipes of that diameter in drainage systems.

What hardware is needed to secure this coupling during installation?

Installation requires tightening the stainless steel clamps with a torque wrench or nut driver to the manufacturer's specified inch-pound value.

Which step is commonly missed when fitting a no hub coupling like this one?

Many installers forget to fully seat both pipe ends against the centre stop before torquing the clamps, which can cause leaks.

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