dunno how prohibitive they are to reproduce, but usually if a product is popular enough, someone comes along and mass manufactures the replacement parts. Just l

dunno how prohibitive they are to reproduce, but usually if a product is popular enough, someone comes along and mass manufactures the replacement parts. Just like car parts. Of course, there are sometimes things you don't want to really mess with of questionable quality. I'm assuming any pressure cooker has a rubber blowoff plug so there's not too much risk of the normal use valve jamming or something. And an electronic pressure cooker might sense over-heat/overpressurization. But if the steam release valve is electronically controlled too... you're now in BMW land