piping choices = horse for courses.
silicon: DIY easy to use, resilant to heat soak, and flexible for routing purposes. iirc 3 ply Samco is pressure tested to 3 bar. For me it was the ideal medium for my 1st steps into developing a fmic instal almost 4 years ago. Now i can enjoy the benefit of seeing everyone elses efforts and developements.
downside is it will flex under high boost applications and uses the dreaded hose joiners which interupt flow.
...and also it ain't cheap.
unfortunately neither is this: