BetterThanLife
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OK How high is the Sink and how high is the toilet? There is nothing stopping you from having a tank, though there is indeed little reason for having one. If you do have one have it between the top of the cubicle and hte bulkhead. No issue there. the Trap is to actually keep water where it belongs but also, at least as important to give things that get sent down the drain, that don't necessarily belong there a place to stop. (Though not as effective in a zero-g environment.) But you shouldn't be using these facilities, if they are water based in a Zero-G environment in the first place. The problem with folding plumbing isn't that it can't be done, but that it adds unneccessary complexity, maintenance and cost to the system, and the results don't add that much functionality to outweigh the penalties. (Regardless of the TL.) The two exceptions to the folding items that make sense, are a table tdesigned to suplement a desk as a place to take a meal and then have it stowed when the dishes are removed, and/or an upper bunk for rooms that are primarily designed for single occupancy. Only if you have a suitable storage solution for the bedding for that upper bunk and that second passenger in the event one is carried.Originally posted by Aramis:
[QB] Re Folding commodes: We need a bowl which extends at least 30cm, and needs to be (for typical male droop) at least 10cm deep, and probably at least 20cm wide. So, adding a drain pipe, we add another 5cm. The toilet
You do NOT need a trap; ships are designed for 0-G functionality as a safety precaution. Every fixture will have a valve system, not a trap. Probably a ball-cock.
Two reasons for folding the toilet: One, it cuts the extrusion from 30+ (preferably almost 50cm) to about 15. Two, it means that you have contained the contaminated area in case of gravity fluctuation, failure, or hard maneuver. (It also means you won't see any brown stains.)
It doesn't need to fold "into" the wall, just up to the wall. Likewise, the sink is similar in needed depth, and the width is useful. The "fixtures" can be spigots mounted on the wall, which are inside when
Also, toilets do NOT need a tank. Typical Alaskan household fill piping is 1" ID 1/32" wall copper supply. More than adequate for most purposes if the pressure is controlled correctly. The toilet can have a local sump, which then presurrizes, that's a mere 15cm deep off the wall.
Here's a D-plan of a 1m fresher. The bars are 1m, marked in 10cm chunks. The lilac area is the plumbing zone; the fresher connects to a built into-the-floor set of 5 conduits: Power, Hot Water, Cold Water, Waste Water, Data. Green roll-away door (rolling point shown.)
Shown with toilet folded down and not. Sink could be inset in collum; sink with watertight cabinet doors could double as a garmet washer...
What I was saying earlier is that if you extend the size of your shower slightly there is little to no reason to fold anything.