Advice? Flexible PVC

So, I am still doing all my research before starting my build and I had a couple of questions about Flexible PVC and people's experiences with it. I want to go with flexible versus regular Sch40 PVC for a couple of reasons. One being the reduction in number of elbows I'll have to use in my plumbing and another being able to shift the plumbing around as I need to work in the sump; instead of working around rigid plumbing.

My first question is Flexible PVC has a working PSI of 100@68F versus Sch40 having a 400 PSI. I only plan on turning my aquarium water over about 10 times per hour and using powerheads to achieve most of the water movement in the display. Does an aquarium system even approach levels where I should worry about the PSI differences?

Second deals with the fact that Flexible PVC is only rated NSF-51 (most all uses expect potable water) where as Sch40 is NSF-61. The various FAQs and Spec sheets I can find attribute this to the fact that when water is allowed to sit in flexible tubing for hours it can acquire a 'plastic taste' but is said to be non-toxic and they even list aquarium use as one of the things that Flexible PVC can be used for. Should I be worried about the different NSF ratings of the two pipes? Has anyone had issues with leeching from Flexible PVC?

So if anyone has had experience with either of these concerns or thoughts; they would be greatly appreciated.

 

Thanks guys. That pretty much answers both my questions.