Mastercool 53377 – R134a Visual Inspection Sight Glass with R134a Manual Couplers

Save Time by Easily Determining if the A/C System Needs to be Flushed

The condition of the refrigerant in your A/C system is an important factor in the proper operation of all components and overall cooling efficiency. The only way to actually see the condition of the refrigerant in your vehicle’s A/C system is with the use of the Mastercool visual inspection sight glass.

This unit can be used with a standard vacuum pump or with the vacuum function on your R/R/R machine. Easy to follow instructions will guide you through the use of either option.

Allows user to visually inspect the refrigerant in any R134a or R1234yf system and identify excess dye, oil or debris

Allows the user to extract a small portion of the refrigerant for actual visual inspection

Leak free, ball valve controlled and will allow the refrigerant extracted for the visual inspection to be deposited back into the system