Lennox 98L78 – LB-97803A Silicone Rubber Pressure Switch Tubing Kit, 18-Piece, Red

The Lennox 98L78 (model LB-97803A) is a complete 18-piece silicone pressure switch tubing assortment designed for accurate, reliable airflow sensing in Lennox HVAC systems. This kit includes six pieces each of 2-inch, 6-inch, and 9-inch lengths, giving technicians the flexibility to replace worn or cracked tubing during service, maintenance, or repairs.

Made from high-grade red silicone rubber, the tubing resists heat, vibration, moisture, and long-term wear. Its 0.360-inch square profile with a 0.196-inch inside diameter ensures a secure fit on compatible pressure switches and ports, helping maintain proper furnace safety operation and combustion airflow monitoring.

This Lennox OEM kit is ideal for routine maintenance, troubleshooting pressure faults, or restoring correct airflow sensing performance in furnaces and HVAC equipment.

Features
• Includes 18 pieces total: 6 pieces of 2-inch, 6-inch, and 9-inch lengths
• OEM Lennox replacement pressure switch tubing for reliable system performance
• Durable red silicone rubber resists heat, moisture, and cracking
• 0.360" square x 0.196" ID for secure, accurate pressure sensing connections
• Helps correct pressure switch errors, airflow issues, and furnace shutdowns
• Suitable for servicing many Lennox gas furnace and HVAC models