It should be, I would question why you need RO before you can drink the water though, its quite expensive
i work for a health insurance company, they have to be seen to care for their staff lol but im not 100 percent if it is an ro unit, i looked on the back of the water machine, which is attached to the mains, it has a white canister on the back from a company called aquasafe, with a red or blue or eevn white cable coming out of the back of that, which is attached to the drinks machine? does that make sense and do you think it is an ro filter?