Mission Rubber c-430hw 4 Inches X 3 Inches Heavy-duty No-hub Reducing Coupling Domestic

Product Description

The Mission Rubber C-430HW is a heavy-duty no-hub reducing coupling designed to connect 4-inch no-hub cast iron pipe to 3-inch no-hub cast iron pipe in a straight-line configuration. This domestic-made coupling is built for demanding plumbing installations where a reliable, leak-proof connection is required between two different pipe sizes. HVAC technicians, licensed plumbers, and drain-waste-vent installers rely on no-hub couplings like this one to join cast iron pipe sections quickly and securely without the need for threaded fittings or solvent cement. The C-430HW is rated for non-pressure, gravity flow applications, making it well suited for drain, waste, and vent systems in residential, commercial, and light industrial settings. The coupling is constructed with a heavy-duty 304 stainless steel shield and clamp assembly, which provides strong corrosion resistance and long service life even in buried or underground installations. Molded sealing O-rings are positioned under each clamp to prevent pipe end slippage and reinforce the integrity of the joint seal. An internal pipe stop ensures that each pipe end is inserted to the correct depth, reducing vibration and noise transmission through the joint. The maximum torque rating is 80 inch-pounds, giving installers a clear tightening target for consistent, code-compliant joints. The C-430HW meets FM 1680 CLASS 1, ASTM C 1540, ASTM C 564, ASTM A240/A240M, and CSA B602 standards and carries UPC approval and IAPMO 7816 listing. It cross-references to Anaco-Husky Cemco 4009 and Fernco ProFlex NH-42, making it a direct replacement option for those part numbers. The coupling can be assembled, disassembled, and reused, which is a practical advantage during rough-in inspections or system modifications. Made in the USA.

• Connects 4-inch no-hub cast iron pipe to 3-inch no-hub cast iron pipe in a straight-line run
• Heavy-duty 304 stainless steel shield and clamps rated to 80 inch-pounds torque for secure, code-compliant joints
• Molded O-rings under each clamp prevent slippage and reinforce the seal; internal pipe stop ensures proper positioning

Product Highlights

The Mission Rubber C-430HW delivers a heavy-duty, UPC-approved no-hub reducing connection for gravity-flow drain and waste systems, with corrosion-resistant stainless steel hardware and a design approved for underground use. Its compliance with multiple ASTM, FM, and CSA standards makes it a reliable choice for professional plumbing installations.

Product Information

Standard Information

• Brand: MISSION RUBBER
• Manufacturer Part Number: C-430HW

Technical Specifications

• Side A Pipe Size: 4 inches No-Hub Cast Iron
• Side B Pipe Size: 3 inches No-Hub Cast Iron
• Shield and Clamp Material: Heavy-Duty 304 Stainless Steel
• Application: Non-pressure, gravity flow only
• Maximum Torque: 80 inch-pounds
• Standards: FM 1680 CLASS 1, ASTM C 1540, ASTM C 564, ASTM A240/A240M, CSA B602, IAPMO 7816
• Approvals: UPC Approved
• Country of Origin: USA
• Cross-Reference: Anaco-Husky Cemco 4009, Fernco ProFlex NH-42