Mastercool Nitrogen Pressure Testing Regulator Kit. The new nitrogen regulator from Mastercool is especially made to fit the requirements of vehicle A/C and HVAC/R systems. When a system is not filled with refrigerant, it is tested for leaks using a single-stage nitrogen regulator.
Mastercool Nitrogen Pressure Testing Regulator Kit. The new nitrogen regulator from Mastercool is especially made to fit the requirements of vehicle A/C and HVAC/R systems. When a system is not filled with refrigerant, it is tested for leaks using a single-stage nitrogen regulator.