On the tank to pump feed jubilees are fine, as only little pressure, the output could be secured perfectly safely with jubilee clips, if decent ones, personally if in a hurry I would use OPA pipe, I use this injection pipe, it is up to 25 BAR, so more than enough, and cheap, the last bit I bought was 17mm(internal) 1 meter for £5.86p(inc vat).
Although it can be safe with jubilee clips, it never looks it, in pressure terms it is no pressure at all.
tabetha