Lennox 20X56 (Lennox 550003452) Clamshell Vent Clamps are designed to provide a secure and reliable connection for PVC venting systems used in high-efficiency HVAC equipment. These genuine Lennox vent clamps are engineered specifically for 3 inch (80 mm) vent pipe applications, ensuring proper alignment and a tight seal at vent joints.

This 5-pack of clamshell-style vent clamps is commonly used in gas furnaces, boilers, and other condensing appliances where maintaining vent integrity is critical for safe operation. The clamshell design allows for quick installation while delivering consistent clamping pressure to help prevent vent separation, leakage, or movement during system operation.

Manufactured to Lennox factory specifications, these vent clamps are ideal for both new installations and service replacements, helping technicians maintain code-compliant venting and long-term system reliability.

 

Product features and benefits

• Genuine Lennox OEM replacement part
• Part number 550003452, catalog number 20X56
• Designed for 3 inch (80 mm) PVC vent pipe
• Clamshell-style construction for secure, even clamping
• Helps maintain proper vent alignment and joint integrity
• Suitable for high-efficiency furnaces and condensing HVAC equipment• Package includes 5 vent clamps

 

Applications

• HVAC furnace venting systems
• Condensing gas appliances
• Replacement or maintenance of existing vent connections

 

This Lennox clamshell vent clamp kit is an essential component for ensuring safe, durable, and manufacturer-approved venting performance in residential and light commercial HVAC systems.