Fernco hd-33 Heavy Duty No-hub Pipe Coupling 3 in

Product Description

The FERNCO hd-33 is a heavy-duty no-hub pipe coupling designed to join no-hub cast iron pipe in drain, waste, and vent systems. Built to HD Series specifications, it features a patented shield design that maximizes pressure transfer from the clamps to the gasket and pipe, producing a secure, leak-resistant connection. The coupling is constructed from stainless steel and manufactured domestically. It meets multiple industry standards including ASTM C564/C1540 and CISPI 310. Licensed plumbers and pipefitters install this fitting in both new construction and retrofit applications where a reliable, code-compliant no-hub connection is required.

The hd-33 is suited for 3-inch nominal no-hub cast iron piping systems in residential and commercial plumbing installations. It is specifically engineered to replace less-efficient hub-and-spigot connections, making it a practical choice for drain and waste line repairs or new rough-in work. The heavy-duty classification means it performs where standard couplings may be undersized for the application, such as below-slab or high-load drain runs.

Key Features

• Patented shield design maximizes clamp-to-gasket pressure transfer for a secure seal
• Heavy-duty construction rated for demanding no-hub cast iron piping applications
• Stainless steel body resists corrosion in wet and underground environments
• Domestic manufacture meets ASTM C564/C1540 and CISPI 310 standards
• IAPMO listed (File No. 3198) and carries MEA 253-98-E approval
• Designed to replace hub-and-spigot joints with a more efficient no-hub connection

Compatibility

Designed as an OEM-style heavy-duty replacement coupling for 3-inch nominal no-hub cast iron pipe systems conforming to CISPI 310 and ASTM C1540 standards.

Installation Notes

Installation should be performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Shut off flow to the line and relieve any system pressure before removing existing fittings or pipe sections. Ensure pipe ends are clean, square, and free of burrs before seating the gasket and tightening the shield clamps. Do not over-torque the clamp bolts; follow the torque range specified in the applicable CISPI 310 installation guidelines.

Technical Specifications

• Nominal Size: 3 inches
• Material: Stainless Steel
• Series: HD Series
• Type: Heavy Duty
• Weight: 0.61 pounds
• Country of Origin: US
• Standards and Approvals: ASTM C564/C1540, CISPI 310, CMR-248, IAPMO File No. 3198, MEA 253-98-E

Standard Information

• Brand: FERNCO
• Manufacturer Part Number: hd-33