crusso

You won't have any problem. Mine has a Clean-Up “Blow-Out” Cycle. At 12:00 noon everyday the jets activate to circulate any water in the plumbing. In addtion, when I shock my tub I turn the jets on, close the lid and let the jets mix the shock.

Have the 480. Don't know how sadistic you are with regard to the jets, but the jets pack more then enough punch for me without the "stabbing pin feeling" Good warranty, built tough. Great Lounger: I usually sit in it first and then move to a different seat latter. The only complaint about the lounger is that I wish they turned it around so that it is facing the controls and not my cover. Good Luck