Heh, this is reminiscent of the infamous HN dropbox comment.
Free chlorine (technically assorted chlorine oxides like hypochlorite) attacks RO membranes, so now you have to deactivate your reactive species first. Usually UV lamps, you use sun, but now you need UV-clear tubing, not easy.
Reverse flow flushing can be done with the components you mention, that's another $20/50 plus sourcing logistics.
Yes, the theoretical expense in quality pumps is quality. There are tighter tolerances, beefier components, better polymers, and more QA. It all adds up.
It's still all fairly cheap by Western standards, but it's a tall ask for a lot of places that barely have potable water.
Free chlorine (technically assorted chlorine oxides like hypochlorite) attacks RO membranes, so now you have to deactivate your reactive species first. Usually UV lamps, you use sun, but now you need UV-clear tubing, not easy.
Reverse flow flushing can be done with the components you mention, that's another $20/50 plus sourcing logistics.
Yes, the theoretical expense in quality pumps is quality. There are tighter tolerances, beefier components, better polymers, and more QA. It all adds up.
It's still all fairly cheap by Western standards, but it's a tall ask for a lot of places that barely have potable water.