If you're vibration isolating a pump, think about using soft silicone thin-wall tubing for the sections directly connected to the pump.
This is only practical if you also use cool sleeves to keep the tubing from collapsing.
These were out of stock everywhere for some while, but now appear to be back - at least at Jab-Tech CoolSleeves
Every time I think about recommending doing this, I realize that "you just can't get those anymore". So, when I ran into these on a random browse, I thought I'd mention it here...