its most probably push fit connectors you will wan't. ebay have mostwhat size RO is it, my first RO's had 1/4 on everything, my new one has 1/2 inputthis is what i use for the pure outhttp://www.ebay.co.uk/itm/1-4-Push-Fit-Garden-Hose-Connector-/250915862564?pt=UK_HGKitchen_SmallApp_RL&hash=item3a6bc03824