the blue TT2-001 tubes are used for acid testing in R-410A systems

Will this plug fit non-Lennox compressors

Using this on an R22 system will result in improper refrigerant metering and likely compressor failure

and auxiliary stages

making it ideal for low-pressure city gas applications

Sensus 173-62-021-02 Spring 320788-703 the blue TT2-001 tubes areThe Sensus 173 62 021 02 Spring is a critical component for maintaining precise pressure control in Sensus 143 80 gas regulators and other compatible 173 series models. As a veteran grade cadmium spring, it is engineered to provide a specific outlet pressure range of 1 2 to 3 PSI, ensuring the regulator maintains a stable set point even under varying inlet conditions. This cadmium plated heating and gas part is designed for high corrosion resistance