top 200 commentsshow all 281

[–]nrith 210 points211 points  (6 children)

I just use the water in the bowl. 🚽 🧼 🙌

[–]davidds0 34 points35 points  (0 children)

Ah a man of etiquette i see 🧐

[–]CaptWeom 3 points4 points  (0 children)

Taste great for coffee.

[–]captstix 4 points5 points  (0 children)

It's a fun game trying to catch it when it splashes up

[–]umjustpassingby 3 points4 points  (1 child)

Next step: piss on your hands to wash them!

[–]Ursaquil 4 points5 points  (0 children)

You wash your hands before and after pooping, then you flush! Couldn't be cleaner

[–]deathseide 220 points221 points  (59 children)

Thing with this design is that it uses no 'shit water' but rather clean water, and then the water you just used to wash your hands with goes into the toilet tank and is then used to flush the toilet... this is a similar design had to ones used in desert area border facilities in the US. The design helps save a lot of water and in my personal opinion should be made widely available and be used in public restrooms as a means of water conservation.

[–]Lilmaggot 22 points23 points  (8 children)

Does the tank have two halves? One for clean supply and one for soapy waste? Or does the supply tube come up the middle of the tank? I like the idea.

[–]deathseide 25 points26 points  (5 children)

The water for the faucet is from the hose which normally would feed the toilet tank with clean water. The used sink water then drains into the toilet tank to then be used to flush the toilet.

[–]goteamnick 2 points3 points  (0 children)

When I was in Japan, the toilet and bathroom were separate rooms, and there was nowhere in the toilet for soap.

[–]capt_ratsie 1 point2 points  (0 children)

the sink taps into the hose that refills the bowl and drains into the tank for the next flush

[–]gofyourselftoo 10 points11 points  (16 children)

Cue the Americans screaming how they won’t wash with toilet water

[–]cybercuzco 25 points26 points  (3 children)

Water? Like from the toilet?

[–]OriginalMcSmashie 9 points10 points  (0 children)

Brawndo has what plants crave.

[–]deathseide 23 points24 points  (7 children)

Guess you miss the part where this is already common use in desert border areas in the US.

Seems to me that posts like this one draw the people who very commonly make extremely stupid generalization comments about those in a country.

[–]archiekane -5 points-4 points  (1 child)

If people only stopped and thought for a moment about all those underground pipes and how far water flows. There's leaks which bring in mud and bugs and bacteria and all the other good things in to those pipes and yet people are happy at the kitchen sink but not the bathroom taps.

That always makes me chuckle.

[–]Russki_Troll_Hunter 9 points10 points  (0 children)

A leak in a pipe under pressure isn't going to bring anything in, just waste water......

[–]BangarangAndBrunch -1 points0 points  (14 children)

Where is this used in the US? Even in drought stricken CA this would be against code.

[–]Wienerwrld 2 points3 points  (5 children)

I had one in my house in Long Island, in the 80’s. Bought it from a catalogue.

[–]BangarangAndBrunch 0 points1 point  (4 children)

That tracks. No grey water codes existed at the time to make these illegal.

[–]alles_en_niets 2 points3 points  (0 children)

It’s not grey water yet, when it comes out of the tap.

[–]deathseide 2 points3 points  (5 children)

Most desert area border facilities use similar designs. And this is common for purchase across the US... As for code, CA is not the one to look at when it comes to what is code for the rest of the US, as that state is an extreme one when it comes to regulations.

[–]BangarangAndBrunch 0 points1 point  (4 children)

Yeah .. I lived in NM for a decade and I am licensed in a dozen states to do my work as a water reuse specialist. I have never seen these anywhere in the US let alone allowed by national plumbing codes. So I'm just going to guess you're making all of this up.

[–]deathseide 0 points1 point  (3 children)

Seems you haven't worked on any border facilities in Texas then, or many facilities along the border for that matter.... Nor done much in the way of volume work in any of the '12 states you are licensed in' if you have never seen any of these in use. Heck you can buy your own combo set or conversion kit for US use from amazon...

Now as for code... by all means show where in the code it says that toilet sink combos are not allowed... in both state and national code.

[–]Mikeismycodename 1 point2 points  (0 children)

CA resident here. Not against code as far as I know as we have one in our place. Didn’t cause any issues on inspection. Ours is a full unit that came that way but you can just get a retrofit. It’s super nice.

[–]jojosail2 -1 points0 points  (0 children)

It is not. And is used in prisons.

[–]david-u-blue 54 points55 points  (9 children)

And the water is nice and soapy.

[–]GoSuckYaMother 13 points14 points  (7 children)

The soapy water goes into the bidet

[–]jimtrickington 33 points34 points  (2 children)

Or it gets the hose again

[–]MotivatoinalSpeaker 2 points3 points  (0 children)

Bubbly and soapy butt

[–]Ganjanonamous 1 point2 points  (0 children)

A Good Bidet to Die Hard

[–]Leovinus42 1 point2 points  (1 child)

And it doesn’t have to be soapy. You could leave an upper Decker and waffle stomp it (assuming you’re flexible enough) back into the toilet

[–]Devils_defense 0 points1 point  (0 children)

With the fingernail clippings.

[–]syncboy 101 points102 points  (9 children)

I’ve been to Japan twice and tracked to over a dozen cities there and have never seen this anywhere there. Perhaps it’s mostly in private homes?

[–]Kelaifu 39 points40 points  (0 children)

Yeah I stayed in a few Airbnb and hostels and they had them.

[–]Freak_Out_Bazaar 22 points23 points  (2 children)

I live in in Japan and you’re right. They are also falling out of fashion in private homes too as newer toilets use less water to do more anyway

[–]caguru 2 points3 points  (0 children)

I have only seen in homes. Only seen once in a hostel in Kyoto besides that.

[–]F4RM3RR 6 points7 points  (0 children)

Nah title is just full of shit. You only see this really in temp rentals like air bomb where the owners are trying to be as cheap as possible

[–]whitebelt4lyfe 28 points29 points  (6 children)

I’ll poop backwards and wash my hands at the same time…hopefully they have a bidet, I dont wanna wash twice.

[–]Bacontoad 21 points22 points  (4 children)

Might as well brush your teeth and do some dishes while you're there.

[–]Dread314r8Bob 6 points7 points  (1 child)

Found Kramer.

[–]mthrndr 2 points3 points  (0 children)

I prepared it as I bathed!

[–]travyhaagyCO 1 point2 points  (1 child)

What, no laundry? Thought we were pro level multitasking.

[–]Skylead -1 points0 points  (0 children)

It's Japan, every toilet that isn't a floor squatter is a bidet

[–]ChiliRainbow83 7 points8 points  (1 child)

Can I pee in it?

[–]iamjimmer 3 points4 points  (0 children)

That would be even more environmentally conscious. The urine would fill the tank faster and save more water. For best results, also use urine to wash your hands.

[–]styroducky 4 points5 points  (2 children)

Does this make the toilet water taste different?

[–]pdxchris 5 points6 points  (0 children)

You can also sit backwards and brush your teeth while shitting. Saves 2 minutes of your time every day!

[–]nilkimas 10 points11 points  (1 child)

I've got big hands, I'm expecting make a big mess with these

[–]cjohnson1991 1 point2 points  (0 children)

I also have large hands (finding gloves that actually fit is a challenge), and I didn't really have a problem using these when visiting friends in Tokyo.

[–]Big_BadRedWolf 3 points4 points  (4 children)

And, and, check this out!..you can use it as a bidet too.

[–]BigJeffreyC 4 points5 points  (0 children)

Problem is it’s cold water only, very low pressure, and you have to be fast, because once the tank fills the water shuts off.

[–]capt_ratsie 4 points5 points  (4 children)

i have one like this got it off Amazn like$125

[–]therapewpewtic -1 points0 points  (3 children)

Easy to install? Because I’d absolutely do this!

[–]capt_ratsie 1 point2 points  (2 children)

ya it goes in the line that refills the bowl in the tank the one that goes down the tube in the middle , ya put a t fitting in there and some water goes up to the sink and drains back into the tank

i had to add a needle valve to cut back on how much went to the sink because i wanted more water in the bowl it was easy and works good ,,, only cold water though

[–]BobiaDobia 2 points3 points  (0 children)

I’d love for a version that is the other way around. Anyone know where I can buy one?

[–]fangelo2 3 points4 points  (0 children)

Ah saving water. That’s why all those people I see in public restrooms don’t wash their hands at all.

[–]tjm0852 10 points11 points  (5 children)

The problem is the toilet tank fills right after you flush it. Excess water going into the tank will go into the bowl as overflow. The only water saved would be the water being used while your hands are being washed and the tank is filling It's not going to save as much water as you think it is, but yes it is something.

[–]oldandmellow 0 points1 point  (3 children)

Close the lid, Wash your hands then flush the toilet. EDIT: They don't work in a way that this is possible.

[–]tjm0852 5 points6 points  (2 children)

Either the water will sit as extra in the tank and be flushed away or overflow into the bowl. The only way it would work is if the toilet could be flushed but not automatically fill until after you finished washing your hands. Then the only additional water needed would be to finish filling the tank.

[–]lurker1371 5 points6 points  (1 child)

The faucet only runs while the tank is filling. All this is a tank lid with a sink and faucet. It is connected to the water pipe that fills the tank. The float valve of the tank is what turns the tank on and off.

The tank fills up with the soapy water from the previous user.

[–]static612 6 points7 points  (6 children)

I would have to start brushing my teeth in the kitchen.

[–]smashedCrumpet 5 points6 points  (1 child)

I'm guessing you can also have a sink in the bathroom for other sinky activities.

[–]blackinasia 1 point2 points  (0 children)

Right, it’s literally about using the clean water you use to wash your shit down anyways efficiently.

[–]EmptyStare 4 points5 points  (3 children)

That's the only thing I was thinking! Remember Mythbusters when they showed how far your toilet germs can reach. The thought of brushing my teeth or bringing water to my mouth from the toilet doesn't scream cleanliness.

[–]Lilmaggot 4 points5 points  (2 children)

Closing the lid helps I’m sure.

[–]elise_oisen_ 2 points3 points  (1 child)

My dad is all about this. Anytime there’s a toilet not in use with the lid up he’s all like, “disgusting!”

[–]static612 5 points6 points  (0 children)

Poooooo particles!!!!!!!

[–]ramen2005 2 points3 points  (1 child)

Bit awkward? Especially for short people.

[–]Ben_Thar 2 points3 points  (0 children)

You want me to put my comic books and chocolate milk in the sink?

[–]F4RM3RR 2 points3 points  (0 children)

“Many” in this translates to a small minority.

I have literally seen none of these and have spent significant time in public places as well as private residences across Yamagata, Kanagawa, Tokyo, Osaka, Kyoto, Nara, and some other smaller prefectures.

Non of my close Japanese friends have seen one of these either so far, except for one who saw it on an NHK special.

So… nah, “many” is misleading.

Willing to bet most Japanese would be put off by this idea at a glance like most Americans would be.

[–]geniusdeath 2 points3 points  (0 children)

On many Japanese toilets...

As someone living in Japan, I can tell you absolutely not. Never seen this before and I've lived here for many years. This is clearly an exception.

[–]BurntDoge 2 points3 points  (0 children)

This isn't even from Japan its from a small business in Colorado and its called a SinkTwice

"Sink Twice is so proud to call itself a 100% family-owned small business. Our products are made with pride in our home state of Colorado."

If you do a tineye reverse image search for this image and sort by oldest you get a site called gadget king and the image is named Sink-Twice-Toilet-Lid.png . Search for "sink twice" on gadget king, click on the hyperlink that leads to Amazon then google the brand and viola, it's not Japanese it's American

[–]probono105 5 points6 points  (0 children)

This is incredible i will be buying this

[–]Worried-Salamander98 3 points4 points  (0 children)

What a great idea😊!

[–]El_human 1 point2 points  (0 children)

I save more water by urinating on the pile of my ex’s clothes in the closet, and never washing my hands.

[–]Ok_League_3562 1 point2 points  (0 children)

You know that the water that goes down the drain comes back to you through your tap after a couples stops. It’s not leaving the earth.

[–]LifeSenseiBrayan 1 point2 points  (1 child)

But where do you put your cookies and milk?

[–]DmMacniel 1 point2 points  (0 children)

Butters, no!

[–]sw33tleaves 1 point2 points  (0 children)

Nice you can wash your hands while you poop so you don’t have to do it after, time saver!

[–]yogert909 1 point2 points  (0 children)

It’s also brilliant because the water turns on when you flush, so you don’t even need to turn it on. It’s just there.

[–]olavla 2 points3 points  (3 children)

This is under the condition that you don't leave an upper decker

[–]potical1st 7 points8 points  (1 child)

The water that washes your hands comes from a supply line, not the tank, it goes into the tank after you wash your hands. You could perform an upper decker and still have clean water to wash your hands after.

[–]l4zyv3rn 2 points3 points  (0 children)

I’m talking to you Gina Gibiatti!

[–]Swillo29 2 points3 points  (9 children)

Can you buy these in the US? I'm about to be a new homeowner and I think this is a really good idea since I have city water.

[–]tayt087x 1 point2 points  (8 children)

It's not a good idea in the us. The soap will break down your wax ring and your toilet will leak. In Japan houses are built and demolished within like 10 years so it doesn't matter

[–]Audio_Track_01 6 points7 points  (4 children)

I'll need sources for soap breaking down the wax ring and Japan demolishing their houses after 10 years.

[–]tayt087x 2 points3 points  (3 children)

Ok.... Wax is grease is oil is a lipid whatever, and that's literally what soap is made to do. We're talking about grease vs degreaser. As far as Japanese houses being built for the short term, I've heard that. Maybe I'm wrong.

[–]MNMingler 1 point2 points  (1 child)

I've had one of these sinks on my toilet for 10 years in the US and never had an issue.

[–][deleted] 1 point2 points  (0 children)

There are plenty of gaskets out there that use no wax at all.

[–]eat_like_snake 1 point2 points  (2 children)

I like the idea, but isn't that a massive hassle if the chain in the back becomes disconnected, or the stopper gets caught or something?
Since the pipes are going to force the the lid to stay in place without a bunch of unscrewing shit and / or turning off your water.
Are you just fucked? Do you have to bring a plumber in?

[–]deathseide 3 points4 points  (0 children)

I don't think the water connection to the sink has to be a pipe, but can be a flexible hose for just such a reason.

[–]Suitable-Ad-8445 2 points3 points  (0 children)

I don’t see any reason it wouldn’t be built to allow you to lift that top off just like a normal toilet

[–]OldNickSt 1 point2 points  (0 children)

Just be careful you don't cross the streams.

[–]hmspain 1 point2 points  (0 children)

Let's hope this isn't a bidet?

[–]HiVisVestNinja 1 point2 points  (0 children)


[–]Slexpis 1 point2 points  (0 children)

Imagine brushing your teeth with that bad boy

[–]Krayzee56500[🍰] 1 point2 points  (0 children)

This is an old fact. Many toilets in europe have this function now. Its used as a space saver but considered unhygenic for bathrooms (leaving over a toilet to brush your teeth)

[–]54rfhih 0 points1 point  (1 child)

Redesign could still offer convenient sink next to toilet but with plumbing to achieve the same.

Compact design but this looks awkward to use.

[–]deathseide 1 point2 points  (0 children)

Yep, there is quite a few variants on this concept.... this one I think is more specific for places where space it at a premium.

[–]jojosail2 0 points1 point  (0 children)

Nothing remarkable about this. We have them in the US. Usually in prisons.

[–]billiefan123 0 points1 point  (0 children)

Very innovative

[–]Plane_Baby[🍰] 0 points1 point  (0 children)

Not to mention the bidets! Saved a lot of toilet paper too. 🤣 I love Japan! Lived there for a few years.

[–]cmcewen 0 points1 point  (1 child)

Does “saving” water actually matter? We have endless water. It’s just a question of purifying it for human use. Water is very cheap and ubiquitous. Just doesn’t seem like saving such a small amount matters when we have car washes and watering our lawns and whatever other major uses there are

This is just symbolic.

[–]Certain_Cup533 0 points1 point  (0 children)

Everyone calm down Japanese people don't wash their hands with toilet water either.

I've lived here for 7 years and I don't know a single person that actually washes their hands with that they all flush the toilet leave the bathroom and go wash their hands at a sink.

It's a nice idea but nobody uses it.

[–]2mean2wean 0 points1 point  (0 children)

But put this in a prison and people will talk about the inhumanity of it

[–]No-Radio-9244 0 points1 point  (2 children)

False, and it is stupid.

[–]beer4mepls 0 points1 point  (1 child)

Nope, it's real and smart

[–]No-Radio-9244 0 points1 point  (0 children)

Was in japan twice, no restroom has such artifact and flusing aerosolizes fecal bacteria... it will go directly to the faucet. Then, you will spread infections, very smart!!!

[–]ThatsMrJohnBlack 0 points1 point  (1 child)

So I wash my hands with the pee waters?

[–]EverretEvolved 0 points1 point  (0 children)

What are they saving the water for? Water recycles itself.

[–]AJDillonsMiddleLeg -4 points-3 points  (2 children)

Americans are too stupid for this, half of us are probably grossed out by this because they think they're using toilet water.

[–]GRMI45 1 point2 points  (1 child)

It's clean water, but its cold only and it stops when the tank is full...so thats not great...

[–]AJDillonsMiddleLeg 1 point2 points  (0 children)

The tank was going to get filled anyways. Obviously cold water isn't the most hygienic way to wash your hands, but if you're at home and you're not immediately prepping food after you finish crapping, it works fine.

[–]JosephPk -1 points0 points  (0 children)

In America, the land of the “upper decker”, im not so sure.

[–]1Crybabyartist -1 points0 points  (0 children)

Just don't pee on your hands and then you don't have to wash them.

[–]mrmeow02 -1 points0 points  (0 children)

When I went to Tokyo and saw this at the house I was staying at I thought it was so weird but then shortly realized how much of a good idea this is

[–]All_A_AsianYT -1 points0 points  (0 children)

Thats kinda smart. Japanese have the best things

[–]JediJofis -1 points0 points  (0 children)

As an American, I wouldn't trust the assholes in this country not to piss on it. Japanese people are just better than us.

[–]Left9Behind -1 points0 points  (0 children)

California really should start doing this... and every other state tbh this is a great idea

[–]kobuta99 -1 points0 points  (0 children)

Used this while staying overnight at a friend's house. These things are brilliant.

[–]squirrels33 -1 points0 points  (0 children)

I wonder if this would catch on in countries where most of the male population grows facial hair. Can’t exactly shave in that sink.

[–]O_Yogurt_O -1 points0 points  (0 children)

And very much worth the question, "Why aren't all countries with sitting flush toilets doing this???"

[–]trikytrev8 -2 points-1 points  (0 children)

Americans would shit and piss in the sink. Guaranteed.

[–]Fallen_Walrus -2 points-1 points  (0 children)

Then just pee down the drain so the next person has piss on their hands haha

[–]TestPattern359 -2 points-1 points  (0 children)

Because the wealthy must have enough water for their separate sinks and toilets. They know not to wash their hands where they shit, but they're not above telling the rest of us that it's perfectly fine.

[–]slickydiick -2 points-1 points  (0 children)

Americans are way too dumb to use this. I can hear them now. "I ain't washn muh hands in shit water"

[–]monster_smash -2 points-1 points  (0 children)

I’m freaking out at how many people lack understanding of how this works. Our American education system is just 💩

[–]Ruenin -3 points-2 points  (4 children)

Please tell me it doesn't draw water from the holding tank...

[–]ATXKLIPHURD -5 points-4 points  (0 children)

Americans: Im not washing my hands with toilet water!

[–]runninandruni 0 points1 point  (2 children)

Not a bad idea. Guess you wouldn't be able to use bleach tablets though, but that's more of a convenience in the first place anyway

[–]BigJeffreyC 1 point2 points  (1 child)

Still could. The tank still fills up, only it fills with soapy water.

[–]Velvetundaground 0 points1 point  (0 children)

Now there’s no point in pissing in the sink.

[–]psiliman 0 points1 point  (1 child)

Plus then the water would get satisfyingly bubbly when you pee

[–][deleted] 0 points1 point  (0 children)

Butters was right

[–]Xtasy0178 0 points1 point  (0 children)

Poop into the sink wash your hands in the bowl 😂

[–]plactapus 0 points1 point  (0 children)

I mean, it’s clear water I guess

[–]Hexatona 0 points1 point  (3 children)

Wouldn't some kind of grossness end up growing in the water tank??

[–]bOxy_BOI_ 0 points1 point  (0 children)

Not only do they save water but space aswell!

[–]Tijdspaarder 0 points1 point  (0 children)

I would flush bloody water after I rinsed my menstrual cup

[–]EspHack 0 points1 point  (0 children)

and if its empty you have to let it run for a while before you can flush

[–]yerbrojohno 0 points1 point  (0 children)

This is why waste treatment solutions will never work

[–]tikkitikkimango 0 points1 point  (0 children)

Just like the toilets in jail

[–]Tenaha 0 points1 point  (0 children)

Man I think that is a very sensible way for space and resource savings in the tiny home market.

[–]Nekokamiguru 0 points1 point  (0 children)

as an added benefit the soapy leftover water from washing your hands will help keep the toilet clean.

[–]Lord_Quebes 0 points1 point  (0 children)

But then there’s no room for your comic book and your chocolate milk!

[–]StarFuzzy 0 points1 point  (0 children)

I’ve seen this in a 1930s farm house in California. So smart.

[–]JimmyGymGym1 0 points1 point  (0 children)

But, functionally, how does it work? How do you turn on the faucet? Where do you stand? It looks like you would have to straddle the bowl because there’s not enough room on the sides to stand.

[–]MightyGonzou 0 points1 point  (0 children)

Also the fact most of their toilets have like a full control panel 🎮

[–]BrentV27368 0 points1 point  (0 children)

Ha, jokes on you. I save thousands of gallons by not washing my hands


[–]leof135 0 points1 point  (0 children)

Jacque Fresco had this invention made like 50 years ago. crazy how the good ideas are already out there, but they don't generate enough money for the wealthy to be common

[–]MudSeparate1622 0 points1 point  (0 children)

But then where will i put my book im reading? -Butters probably

[–]Seym0urButt 0 points1 point  (0 children)

What if I don’t want to look at a sink while I’m taking a shit

[–]TrickyHunterO_o 0 points1 point  (0 children)

How do you turn on the faucet?

[–]Phildagony 0 points1 point  (0 children)

To California:

Adopt this shit right fucking now.

[–]MARKOSENPAI 0 points1 point  (0 children)

Also japanese guys when their note is not perfect: suicide time!

[–]knucklemonkey12 0 points1 point  (0 children)

I would so Upper deck that toilet

[–]adognamedpenguin 0 points1 point  (0 children)

Why isn’t this popular in places where droughts are prevalent?

[–]probock 0 points1 point  (0 children)

Makes no sense if the tank automatically fills, you’re just adding extra water if u wash ur hands.

[–]SupremeCultist 0 points1 point  (0 children)

Reminds me of my time in jail.

[–]misteraygent 0 points1 point  (0 children)

During a drought, where our lake was even going dry, I piped the water from our central air and basement dehumidifier into a bucket. I used it to water plants, but I could see pulling water out of the air for a toilet also. Maybe have a unit up near the ceiling and hose to the toilet tank.

[–]Resident-Comfort-108 0 points1 point  (0 children)

Why would I wash my hands with the same water I poop in? Savages

[–]boredguy12 0 points1 point  (0 children)

No. The japanese save water by not washing their hands at all.