How long and at what pressure do I sterilise grain?

Sterilise jars or bags of hydrated grain at 15 psi, about 121°C, for 90 to 120 minutes, then let them cool without opening the cooker so nothing is drawn in. Larger jars and denser grain need the longer time. Grain should be at roughly 45 to 55% moisture so it does not clump or burst. Never rush the cool-down.