My uncle will travel and  stay at serviced apartments (whose  structure and interior he must not change), across Canada for work where the tap water is normally safe, but he needs  (hereafter ) water for health reasons.  's  portable countertop RO system's Diverter Valve (DV) must be connected to the faucet's  (MT), and so does not help, because even if the apartments' faucets use MT, the MT's size may not match the DV's.
120405
My relatives will be travelling in North America, UK, and Hong Kong. For environmentalism, they do not use bottled water, and need a water filter that:   removes chemicals, metals, and pathogens. They will always boil any filtered water as extra precaution.  can be transported (i.e. no installation or plumbing changes needed) are not jug/pitchers (e.g. BRITA, Mavea, Pur) because    These should be non-electrical ()
85110
We observed a really weird behavior this morning.   While showering, if any sink faucet is turned on anywhere in the house, the shower continues without any problem. However, when that sink is turned off, water flow in the shower drops by over 90% to a trickle. Turning off the shower and back on restores water flow to normal.   We've never had this problem with the shower before. (The shower plumbing was all completely replaced 6 months ago as a part of a remodel)  Is there any explanation for this?
22286
if I have a closed system of horizontal pipes, filled with water, where I want to create a flow at some rate by using a pump. Does the length of the system influences the flow ? (in real world not in the wonderful world of the books)
89700
I must be overlooking something but I really don't see the need to have a bulk terminal. I am studying the body effect whereby it somehow interferes with the threshold voltage. I don't fully understand it because I'm finding creating the terminal in itself counter intuitive.    I am told that it must be connected to the lowest or highest voltage in a circuit, depending on n or p channel. First of all, if this interferes with the threshold voltage, wouldn't my supply rails directly interfere with the mosfet since they could be 1V or 15V. Not to mention if there was noise in the power supply, it would directly transmit through, no?  What would happen if there was no body terminal?   Why does a BJT not need one?  Do enlighten me.
98696
I have an old (circa 1920s) bathroom faucet with a compression stem that started to leak unless tightened extremely tightly. When I took out the compression stem to replace it, I found that the screw attaching the seal at the bottom was seized and corroded. Replacing the faucet would be difficult because of limited access - I would need to remove the toilet cistern in order to get in there. So I am looking for a replacement compression stem for this faucet.   I am having a very hard time identifying it and finding a replacement. I have tried several local plumbing supply stores. I sent images to American Brass and American Standard - both told me they could not identify the part as theirs. I also contacted  who is supposed to specialize in things of the sort. They told me they would need to know the product line in order to identify the part. I have no idea how to determine the product line though. How can I better identify this part?
29373
I have just seen this written down;  $ some-command &gt;| /tmp/output.txt   Vertical pipes are used in standard redirects "piping" the output of one command to another, is &gt;| in fact completely useless as it would be the same as just &gt; in this scenario?
64618
We're definitely not DIY-types in our household, so would love an answer from those who know the answer: We have a gas water heater in the basement, and will be traveling for over a month this summer. No worries about freezing at this time of year, but the water heater is aging and we'd rather not have a flood if it should fail while we're gone. Our thoughts are to turn off the water at the main, &amp; drain the pipes to avoid any possible leakage problems. What do we do with the water heater? Normally we don't shut the water off, so we usually just turn the water heater to "pilot". Suggestions?
73172
Concerned paragraph:  [Background: a master and his servant (a water tubewell technician) have been living happily for several years. The master owns seven farms spread across a large river. The master "became familiar with this ubiquitous man, who not only accompanied him on his tours of inspection, but morning and night could be found standing on the master bed rewiring the light fixture or in the bathroom poking at the water heater". Now, on this one day, the servant has hesitatingly said this to his master]  [i've redacted the proper nouns for these people's names with "the master" and "the servant" to avoid confusion]     “Sir, as you know, your lands stretch from here to the Indus, and on these lands are fully seventeen tube wells, and to tend these seventeen tube wells there is but one man, me, your servant. In your service I have earned these gray hairs”—here he bowed his head to show the gray—“and now I cannot fulfill my duties as I should. Enough, sir, enough. I beg you, forgive me my weakness. Better a darkened house and proud hunger within than disgrace in the light of day. Release me, I ask you, I beg you.”   Question asked related to this quote     The servant's comments primarily serve to:    flatter the master by mentioning how vast his lands are. boast to the master about how competent and reliable the servant is. emphasize the servant's diligence and loyalty to his master. notify the master that the servant intends to quit his job tending the tube wells.     My question:  Notice the lines of the paragraph: "now I cannot fulfill my duties as I should" and "Release me". Don't they clearly indicate that the servant intends to quit his job? Hence, option 4 should clearly be correct.  However, option 3 has been given as correct by KhanAcademy, saying that option 4 is incorrect because "The servant doesn’t say he intends to quit his job, asking instead only for help doing it"  So, my question is:     Isn't the above a clear example of misinterpretation of the paragraph by KA?     All options with KhanAcademy's explanations - for reference   Even though it initially highlights the vastness of the master’s lands, it primarily focuses on the servant’s dedication and service to the master. This emphasizes not that the servant is competent and reliable but that the servant feels he is no longer able to adequately fulfill his duties. The main purpose of the servant’s comments is to highlight the labor and service he has provided for the master over the years. the servant says “there is but one man, me, your servant” to take care of the tube wells on all the master’s vast lands and that the extensive work has resulted in the servant earning gray hairs on his employer’s behalf. The servant doesn’t say he intends to quit his job, asking instead only for help doing it.
99228
My friend posed this question to me:  I have a glass with 8 litres of water along with one empty 3 litre and an empty 5 litre glass. I have to pour 4 litres of water into his glass in one go. His glass is not calibrated. We do not know how much volume of water it can hold(but it is more than 4). I solved the problem in this way:  $\begin{matrix} 8 &amp; 0 &amp;0 \\ 3&amp;5&amp;0\\ 3&amp;2&amp;3\\ 6&amp;2&amp;0\\ 6&amp;0&amp;2\\ 1&amp;5&amp;2\\ 1&amp;4&amp;3\\ \end{matrix}$  Now I can pour the 4 litres from the 5 litre glass.  My question is that can I generalise this problem?      If I have $V_1$ volume of water in a glass which has a capacity of   $V_1$ along with 2 other glasses of volume $V_2$ and $V_3$ such that   ($V_2$ and $V_3$ $\lt$ $V_1$).My friend needs $V$ volume of water in   one go.   And under what conditions will this generalisation fail?
26497
When I studied how AC mains power works, I learned that one of the wires is connected to the ground or a body of water so that it can get back to the power station. The concept baffles me. Every source of information I've come across fails to explain how it works or quickly glosses over it as if it is self explanatory.   If power can travel through the water or the earth back to the power station, then why aren't we getting vaporized when we walk on the ground near power lines?  Also, how does an isolation transformer prevent you or your equipment from getting fried? If I touch both terminals of the secondary, am I going to get fried?
92999
I was flying with Ryanair last month and wanted to take some vitamin pills while on board. I went down to the end of the plane and asked for a glass of water, but the stewardess refused. Since the only other option was to buy a 3EUR bottle, I've decided to take the pills later.   Is there some EU law which obligates airlines to provide water while on board? What about if someone needs water to take their medicine?
51112
I can see the use of the valve cap on a Presta valve when the tube is still packaged (it obviously stops the valve puncturing the tube), but does it do anything except look pretty (or not) once you've fitted the tube to a rim?  I've kept them on out of habit, because I've had problems with sticking Schrader valves in the past when I've lost the caps and dirt/grime has got in there - but the design of Presta valves suggests to me that they wouldn't suffer this fate.  Given that I really need to , is replacing this cap something I can leave out of my daily chores?
117814
Sometimes my toilet starts running for a few seconds at a time, like it's just finishing filling up the tank.  Usually this happens when the bathtub is being drained, or when I turn on the facets in the sink, but I think it also happens sometimes when no water is being used anywhere else.  As far as I can tell the flapper in the tank is working fine, and I don't see any leaks anywhere.
110860
I previously used to create image files using dd, set up a filesystem on them using mkfsand mount them to access them as mounted partitions. Later on, I have seen on the internet that many examples use losetup beforehand to make a loop device entry under /dev, and then mount it. I could not tell why one would practically need an image file to behave as a loop device and have its own /dev entry while the same behaviour can be obtained without all the hassle.   Summary: In a real-life scenario, why do we need a /dev/loopXentry to be present at all, when we can just mount the fs image without it? What's the use of a loop device?
24129
I think everyone should have seen a bowl of hot water moving by itself on a flat surface such as glass(seems like it is moving by itself but maybe there are some external force applied to it when it moves). What is the explanation of this phenomenon?  Hypotheses :   Since the bowl is heavy, for it to move the friction between the bowl and the surface must be very very low. I have heard that water may form a thin layer between the bowl and the surface, but l'm not sure whether it is the case or not. I think the bowl can move by itself because heat makes the air below the bowl expand.   Edit : I will re-experiment those again and update the question in few days. Maybe I will take a video clip too. and I am not talking about a magic trick whatsoever.
87447
I have an American Standard toilet I installed last year. I don't know much about plumbing, but I was able to install this toilet. It seems to function okay, except for what I think is a mechanical problem.  Sometimes when the toilet is flushed, the flapper doesn't close and water keeps running.  The handle feels like it's slightly stuck in the up position.  I looked inside the tank once when it was doing this, and the chain attached to the handle was slack. I don't understand why the flapper isn't closing.  I've tried putting more slack in the chain and loosening the plastic nut that holds the handle on the toilet, but it doesn't seem to be helping.    How can I fix this?
48934
So, if we have a large pipe which is constricted in the middle, the fluid in the middle section  will move faster. Why is it so? What dictates that liquid that an X amount of it must pass on the other side regardless of the size of the encasement?  The only reason I could think about is because that the initial pressure which causes the movement somehow is being transferred to a smaller area, but that makes no sense.