Carrier 330539-757 Coupling Box Refrigerant Does this kit include a

Does this kit include a secondary drain plug

drop-in replacement that maintains original equipment performance standards and agency safety listings

this model is specifically calibrated for a maximum operating pressure of 125 psig

When should an enclosing tube be replaced

Carrier 330539-757 Coupling Box Refrigerant Does this kit include aThe Carrier 330539 757 Coupling Box is a critical OEM replacement component designed for 40 inch tall condensing gas furnaces. This genuine furnace coupling box kit replaces older ICP part numbers, including 320721 768, ensuring a precise fit and restoring the factory standard seal on the secondary heat exchanger. For technicians working on Carrier, Bryant, or Payne furnaces, this kit is essential when addressing common moisture or combustion air