My question refers to the location of the Hoses (if I can call it that), which ventilate the by-product of water processing overboard (CO2, H and CH4). I found great sources on how the ISS ECLSS material flow works at other Q here, but I can't find exactly where the vents are placed outside in that sources or others. I believe it is placed on Destiny or NODE 3, but still without sure which one is active nowadays and the exact location. I saw in this week's on-orbit ISS report that there was LSR Deactivation by the ground team. If possible, I would also like to know if this could cause any flow of that material overboard.
The Regenerative Environmental Control System and Life Support System (ECLSS) racks are currently located in Node 3. This picture from a presentation about the Robotic External Leak Locator shows the location of the vents.
This picture is quite old but is the clearest one in the presentation showing the locations.
Differences between the current Node 3 configuration and this picture:
- Pressurized Mating Adapter 3 (PMA-3) has been removed from Node 3
- Bigelow Expandable Activity Module (BEAM) has been added to Node 3
- Permanent Multipurpose Module (PMM) has been added to Node 3
There are other pictures in the reference showing the configuration after BEAM was installed, but before it was inflated.
This presentation says the Sabatier system was removed from the ISS in 2017, so presumably methane is is no longer vented. But when there was, it used the CO2 vent shown.
I've asked a followup question about the removal of the Sabatier: Why was the Sabatier system removed from the ISS USOS?