Is there an RO filter available that doesn't need to be connected to the mains or pipe? I'd ideally like one that attaches to the faucet with a hose. Does such an RO filter exist?
No it doesnt. But the small hole it creates can be easily fixed when removed by cutting a little piece of rubber tube, the slice it so you can open it and place it over the hole. Then you get a hose clamp and tighten down the clamp over the tube and your pipe is fixed. Cheers