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I was thinking the same thing but all those machine always use some form of flexible hose which from what I have seen are also chock full of plasticizers as wel

I was thinking the same thing but all those machine always use some form of flexible hose which from what I have seen are also chock full of plasticizers as well. Feels like a choose your poison sort of situation. It would be great to have a reverse osmosis machine where only the membrane itself was plastic and everything else was glass or steel. But I am not sure anything like that actually exists?

UI_at_80x24 4y ago
Ouch, that's a good point.
xen2xen1 4y ago
I'd think the single hose /apparatus would have much less exposure than most water supplies, especially over time. Maybe run the water for a bit before using?
Cthulhu_ 4y ago
I mean you could probably get copper piping to work on it with some plumbing skills and tools; copper is, as far as I'm aware, fairly inert in the human body. at the moment anyway.
_yb2s 4y ago
I’m not worried about that. I have a counter top RO machine made out of plastic but the water comes out at nearly 0ppm TDS, and it flows through the machine slowly, at low temp, and for a short time. Whatever is in there is orders of magnitude less than you would find anywhere else, it’s basically laboratory grade pure water.
- thearrow 4y ago
  Which machine do you have? I’ve been looking for a decent countertop RO system without much success.
  - _yb2s 4y ago
    AquaTru. I'm pretty happy with it, purchased it used on eBay and put new filters into it.
  - aliqot 4y ago
    RO Buddy is a good starter if you just want to try for 60ish dollars.
- chaxor 4y ago
  > laboratory grade pure water "but that'll kill 'ya!"
  - _yb2s 4y ago
    I know you’re joking, but I do add mineral drops to bring the TDS back up.
    - Abrownn 4y ago
      Do you have a brand you like? I'm thinking of getting a countertop device soon and they sell a "re-alkalizes it" version but I don't know if that's "enough" and of the right type and I'd like to cover my bases in case it's not.
ohthanks 4y ago
I sell residential RO systems. Industry wide the tubing is typically LDPE and the housings/fittings are mostly polypropylene. There is no real practical way to build a residential RO system without using these materials. It's a trade off between different types of plastic / chemical exposure. Not really ideal but I suspect nearly all sources of treated water will have traveled through a similar amount of plastic to get to you. Copper is avoided on RO systems because the post membrane water typically drops 1-3 points in PH and will slowly corrode and leech copper into the treated water. All post membrane fittings and tubing should be plastic/stainless, cheap brass fittings with high lead content are the biggest concern. This can be resolved with post membrane PH amendment but you then create a failure point that can cause heavy metal exposure or leaks if it isn't maintained. You could build a system with steel housings and braided stainless hose but the size/weight and cost are not practical.

UI_at_80x24 4y ago

Ouch, that's a good point.

xen2xen1 4y ago

I'd think the single hose /apparatus would have much less exposure than most water supplies, especially over time. Maybe run the water for a bit before using?

Cthulhu_ 4y ago

I mean you could probably get copper piping to work on it with some plumbing skills and tools; copper is, as far as I'm aware, fairly inert in the human body. at the moment anyway.

_yb2s 4y ago

I’m not worried about that. I have a counter top RO machine made out of plastic but the water comes out at nearly 0ppm TDS, and it flows through the machine slowly, at low temp, and for a short time. Whatever is in there is orders of magnitude less than you would find anywhere else, it’s basically laboratory grade pure water.

thearrow 4y ago
Which machine do you have? I’ve been looking for a decent countertop RO system without much success.
- _yb2s 4y ago
  AquaTru. I'm pretty happy with it, purchased it used on eBay and put new filters into it.
- aliqot 4y ago
  RO Buddy is a good starter if you just want to try for 60ish dollars.
chaxor 4y ago
> laboratory grade pure water "but that'll kill 'ya!"
- _yb2s 4y ago
  I know you’re joking, but I do add mineral drops to bring the TDS back up.
  - Abrownn 4y ago
    Do you have a brand you like? I'm thinking of getting a countertop device soon and they sell a "re-alkalizes it" version but I don't know if that's "enough" and of the right type and I'd like to cover my bases in case it's not.

ohthanks 4y ago

I sell residential RO systems. Industry wide the tubing is typically LDPE and the housings/fittings are mostly polypropylene. There is no real practical way to build a residential RO system without using these materials. It's a trade off between different types of plastic / chemical exposure. Not really ideal but I suspect nearly all sources of treated water will have traveled through a similar amount of plastic to get to you. Copper is avoided on RO systems because the post membrane water typically drops 1-3 points in PH and will slowly corrode and leech copper into the treated water. All post membrane fittings and tubing should be plastic/stainless, cheap brass fittings with high lead content are the biggest concern. This can be resolved with post membrane PH amendment but you then create a failure point that can cause heavy metal exposure or leaks if it isn't maintained. You could build a system with steel housings and braided stainless hose but the size/weight and cost are not practical.