Carrier wrote:
You think a 10 or 15 foot would be as effective?
Yes, absolutely. The extra 15' in Soundguy's installation does act like a reservoir so he might get one less pump cycle/day.
You only need to isolate the pump's vibrations so one or two feet of 1/2" soft vinyl tubing would do the same. You want to make sure the tubing can handle the pressure.
FWIW, I just replaced some tubing on my irrigation sprayer. The cross-linked tubing gets very brittle and hard because the sprayer sees a lot of sun. I replaced some of it with 1/2" vinyl tubing. The Shurflo pump on the sprayer is almost identical to the RV models, on-demand 60 psi.