Product details
Solid Core Filter Drier 1/4″ FL 4305/2 Castel
The Castel 4305/2 solid core filter drier is engineered to protect refrigeration and air-conditioning systems by removing moisture, acids, and solid particles from the refrigerant circuit. Installed in the liquid line, it supports efficient system operation and extends the service life of compressors and expansion devices. The 1/4″ flare connection ensures secure installation in commercial and light refrigeration applications.
Key Benefits
Removes moisture and contaminants from refrigerant
Solid core filtration for effective protection
Protects compressors and expansion valves
Improves system efficiency and reliability
1/4″ flare connection for secure installation
Specifications
Brand: Castel
Model: 4305/2
Product Type: Solid Core Filter Drier
Connection Type: Flare
Connection Size: 1/4″ FL
Installation: Liquid line mounting
Application: Refrigeration and air-conditioning systems
Applications
Commercial refrigeration systems
Air-conditioning liquid line protection
Cold storage installations
HVAC maintenance and servicing
FAQs
What is the function of this filter drier:
It removes moisture, acids, and solid particles from the refrigerant.
What type of connection does this model use:
It features a 1/4″ flare connection.
Where is this filter drier installed:
It is installed in the liquid line of refrigeration and HVAC systems.
Why is moisture removal important:
Moisture can cause corrosion, ice formation, and system failure, so removing it ensures reliable operation.






