Don't last forever, ours got rust holes in after 9 years, had them welded up but got more. New tank, then never worked properly, pulsing all the time, now the pressure dropped, does not come on for downstairs. Getting a new one on Monday. Tried all the usual remedies, bleeding the air out, tinkering with the pressure switch. 11 years is not bad but I expect some last longer. That one is not powerful enough if you have upstairs