Reusable suction jars Reusable suction jars are produced of polysulfon and can be cleaned with sterilisation to 134°C. Before use it is advisable to attach them to rail system with an appropriate connector or in the specially designed carrier on the suction unit. Every suction jar cover usually has two connectors. On the vacuum connector the vacuum tube is placed and on the patient connector you place the aspirating tube. Every suction jar cover is additionally equipped with a shutoff valve, which prevents liquid from entering the device.