The Pentair 273512 Bleeder W/O-Ring Replacement is a critical component that helps HVAC systems run efficiently. With its O-ring, this premium replacement component guarantees a tight and waterproof seal. Its sleek black color and dimensions of 4" x 2.5" x 6" allow it to blend in perfectly with your HVAC system. Its main purpose is to make it easier for the system to discharge trapped... https://www.usapoolshop.com/273512-pentair-bleeder-w-o-ring-replacement