Sterilisation in place (most commonly called SIP) is the process of automated Sterilisation whilst a system is in place. SIP almost always functions through Moist heat sterilisation, as such it is key to ensure Steam Traps are in place at all drainable points. SIP requires a certain temperature to be reached throughout the system for a certain time to reach a lethality, to ensure the whole system is up to temperature a worst case reading is taken.