I have a Stratus SRC25, rocking piston, 1/4 HP compressor pumping two air stations (one in winter). I run the system year round, 20/7. It has been in continuous use for 2 years, now.
I have a rebuild kit on hand. When do you know it is time to rebuild the compressor? After a set period of time? When the airflow to the airstations reduces significantly? When the unit craps out completely?