I owned a 6 qt stainless steel pressure for years and it worked great until it stopped building pressure.  I replaced it with a new Presto that was exactly the same.  The new one seals sometimes, but most of the time it doesn't. I am not new to using a pressure cooker, and this one is junk.  The screws come loose and the unit does not build pressure.  It just steams the water away.  I will never buy Presto again.  I sent an email to the company but did not get a response.  I plan to discard this cooker, and buy one from a more reliable manufacturer.