Submersible water purifiers work just like wall mounted RO water purifiers. The only difference between under-the-counter and wall-mounted RO water purifiers is the installation and their appearance. Buy Cleanjal Under Sink Water Purifier with RO+UV+UF use the latest purification technologies to purify water and make it fit for consumption. However, compared to wall-mounted or tablet purifiers, under-the-counter water purifiers have much higher flow rates, thanks to the hydrostatic tanks available with the purifiers. As a result, this water purifier requires less time to fill the bottle as compared to other types of water purifiers.