Silicon pipes and food safety

I want to share some useful information that I recently learned while I set up a pump on by brew kettle. I decided to use a simple flexible pipe to recirculate the wort, mainly for consistency in temperature but it also helps with efficiency, sparging and moving the wort. First, I went to a local fitting shop and asked specificly for piping that can take up to at least 80 degrees C of temperature and is food safe. They gave me what they called a silicone pipe, and said it was both heat resistant and food safe. I have earlier learnt in another store, talking to a seller, that there are pipes on the market which people call silicone but in fact are plastic. So I thought I would run a test on my new pipes with plain hot water. It got extremely flexible at around 50 degrees celcius, which is not even very hot. That got me suspicious, I went online and found a store that sells silicone specificly. I visited them, got some real silicone pipe, that cost 3 times the plastic pipe, and also looked different (more opaque, white coloured rather then plain transparent). I was also told that plastic pipes burn, and become sooty black, also stink when burning while real silicone turns white in fire, and doesn't burn that much. Good to know. But real silicone feels and looks so different now it will be easy to tell without the fire test. It is heat resistant to about 180 degrees C and food safe. Also, rubbers generally are not food safe, so I got some silicone pipe pieces in different sices so I can cut O rings off them easily to serve as sealents for my gear. For example I got an angle valve as a tap, I which I figured will work great, because it can be disassambled, so clogging can be removed, but also has a filter in it, in case I need extra filtration, and it had rubber seal on the inside! These rubber seals often smell. But even if they don't they are produced from oil, so they are basically a special kind of plastic. Not heat resistant, not food safe, and they wear off easily, and loose pieces of themselves. So I replaced those with silicone for example. Now my gear is food grade.
On the pictures, the silicone tube is on the right, held with the plier, after the burning test.