The Pentair 154492 Bulkhead O-Ring is a precision-engineered component designed for secure sealing in HVAC systems. As a Bulkhead O-Ring, used in preventing leaks at connection points where pipes or tubes pass through barriers, ensuring system integrity. This O-ring features a 3/16" thickness, a 2-5/8" inner diameter, and a 2" outer diameter, making it suitable for a variety of HVAC a... https://www.usapoolshop.com/154492-pentair-bulkhead-o-ring-3-16-x-2-5-8-id