Flexcon’s Flexwave RO tanks are made for RO accumulator systems where a larger pressure differential is needed. Due to our patented diaphragm design we are able to oversize our diaphragms on Flexwave tanks to take on 20-30% more water than a standard tank. FWRO tanks are composite tanks with a schedule 80 PVC connection. Their composite design prevents corrosion and makes them significantly lighter than an equally sized steel tank.