Pittstop R12, R22, R502, R290, R600a Oil Checker 2 Pack or 10 Pack

Oil, Tools


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Envirosafe Pittstop R12, R22, R502, R290, R600a Oil Checker 2 Pack or 10 Pack Photo - Click to Enlarge

  • Note: This item will not work on R134 systems. If you need to check the oil for an R134 system, please purchase the R134 oil checkers.
  • A cost effective and easy way to detect air conditioning oil levels and harmful acids in the oil of A/C systems without changing out the A/C system and draining all the oil from the system.
  • Many A/C compressor failures are caused by low oil levels and dirty contaminated oil in the A/C system. The use of this low cost oil checker can save you the cost of a new compressor plus the down time caused by the replacement of a compressor.
  • Automotive and commercial installers can use existing service fittings to utilize the oil checker.
  • Directions: Operate the A/C system for 15-20 minutes. Put the oil checker between your thumb, index finger and middle finger and with the A/C compressor running, push down on the low pressure (suction line - which is normally the big A/C line) 2 or 3 times. Set oil checker upright for 3-5 minutes then pick up the oil checker and check the oil level. If the tube is 1/2 full or more, DO NOT add oil to the system. If it is below 1/2 full, add oil to your system. The oil checker is a 1 time use item. THE COMPRESSOR CLUTCH MUST BE ENGAGED OR RUNNING TO GET A CORRECT READING.
  • Also available in 10 packs.
  • Available for R134a and R1234yf systems as well.
  • This item is also available for purchase in bulk without packaging. Contact us for pricing!

Directions  for Use:

  • Operate the A/C system for 15-20 minutes.  
  • The fan can be on high or low.
  • Put the oil checker between your thumb, index finger and middle finger and with the A/C compressor running push down on the low pressure (suction line)(this is normally the big A/C line) 2 or 3 times.  
  • Set oil checker upright for 3-5 minutes then pick up the oil checker and check the oil level.  
  • If the tube is 1/2 full or more, DO NOT add oil to the system.  If it is below 1/2 full, add oil to your system.  
  • The oil checker is a 1 time use item.


Note:  The compressor clutch must be engaged or running to get a correct reading.

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