I was called by the customer and they wanted to schedule the fire suppression inspection of the Ansul kitchen system. I arrived and did a quick visual for any known problems then started to do the testing and inspection of the system. Three of the cylinders in the system needed to have a hydrotest done on them. I swapped the tanks out to get them tested. I replaced the cartridges and changed out the fusible links, caps and nozzles that needed it. They are up and running now and I let the manager know that I would be back when the cylinders were done being hydrotested to put their cylinders back in the system.