Instant Pot has a maximum working pressure of 15.23psi (105kpa). This is marked on the handle releases steam, view the picture on top. One of the design goals of Instant Pot is not to let off steam and make noise during its operation. Therefore, the normal working pressure has been under 15.23psi. Working pressure is in the range Instant Pot 10:15 ~ 11.6 psi. If you have a small amount of food / liquid in the pot, Instant Pot can touch 15.23psi momentarily delay due to thermal conductivity.