Designing

What grade has such simple homework?

Maybe it is a bean counter trying to get into engineering?

Ouch!

I'd like to think that I can tell the difference between, "a skilled person, just 'out of their field'." and a person asking for the easy way out. (Either at work or at school) This may not be a perfect example of homework questions. Notice, the OP did get answers to the question.

"a skilled person, just 'out of their field'." would generally have the courtesy to explain why they needed help, or would at least have the gumption to reword the test question to resemble a real life experience, rather than copying the question directly.

Many here go out of their way to help, once (usually a Guest) responds a second time and gives a more complete reason for needing help.

I suggest that you go back through the last 100 original posts from "Guest" and tell us how many you believe are from, "a skilled person, just 'out of their field'."

And, if it's any consolation, I know I'm an a$shole. But at least I admit it.

True but more like prone to 'grumpy', and at times 'hair trigger', but it's generally quite endearing. And you're not actually the 'problem' here, as I see it.

But first - your "suggestion" for my 'homework assignment'.

Given the question is posed in Imperial, does it indicates a younger person?

If so, then Guest may be in school in American or Burma or Liberia

Or; is it an older person, say 50 to 90, from any number of more recently converted countries, who still thinks in Imperial?

Or; of any age/nationality, who has not studied physics, or hydraulics, or simply forgotten? (due to a career in accounting)

Yes you did answer the question - for us who already understand 'head' - perfectly clearly.

But equally, it wasn't applied, or exampled, to the height given. Nor did anyone ask the pertinent questions on relative elevations - which we both know we need to know, not to give a foolish or misleading result - without a 'dig' at the OP's knowledge level.

Now I'm not saying the OP is a janitor trying to fix a multi-flush system, or a pensioner, or an 'alternate lifestyle' newbie.

It may indeed be a school kid doing homework. But equally, how likely is a teacher to set a question for 12 - 14 year-olds involving toilets?

So, really the main "Ouch" for you is; your 'natural charm', seems to have acquired you an entourage, that unlike you, can't form their own opinions, or recognize your humor/s.

So we should all bow to your thoughts?

What you have determined is 'correct'?

The new god of correctness?

If someone wants to know the weight of water I guess there is the Wiki, Bing, Yahoo search, Alta Vista and a few other sources as well.

No more than usual

"new god of correctness" - obviously not, as I missed where the OP asked for the weight.

I thought OP asked "how do i convert" ... "to water pressure" <twice

And maybe you're right - it is a silly question, though I doubt half the population of a university campus could tell him.

Hi Lyn,

You don't think that you and others have to much saliva for nothing. You answered correctly, so, what's the purpose to add? Politeness or defense never help. Thanks for your "good answer", Gil.

To me - a silly question deserves a silly reply.

A skilled person would ever post such an incomplete and screwed up query? Just 'out of their field' someone may ask a dumb question to those in the know but at least the question should indicate some understanding a something.

No one should ask such a question - not being arrogant - just practical.

Russ

Like he said. Gallons have nothing to do with it. Height is all that matters.

Depends upon how high the tank is above the toilet and how high the level is in the tank. There will be as much of a variation of 3.46 psi dependent upon the level in the tank.

Still stinks of homework!

Good Luck, Old Salt

What is the size of the interconnecting pipe?

Where are you measuring the pressure?

What is the anticipated desired flow rate?

Nominally the water in the tank will be exerting a force against the sides of the tank based on the volume of water behind and above it. That is to say the water at the top of the tank will exert an influence of mass, on the water on the bottom of the tank.

My mate up the bush has a tank that sits 3ft higher than the toilet cistern, but just under the roofline. It fills the cistern in a timely manner much like it was connected to reticulated town water mains. No pump, except from the dam when there hasn't been any rainfall.

Nominally the water in the tank will be exerting a force against the sides of the tank based on the volume of water behind and above it. That is to say the water at the top of the tank will exert an influence of mass, on the water on the bottom of the tank.

NO! As in a post above, height/depth is all that matters. The pressure doesn't care what the volume is, but only the height of water above the measuring point.

Not being one obsessed with decimals to the n^th place, presumptions of other factors other than originally stated, or operating parameters more accurate than the gauge can indicate, (no reflection on person who I am replying to, just a statement of my "git 'er done" approach) BUT unless I read the original posting incorrect there is no reference to wanting to know how good a flush the tank system will produce. Am I incorrect?

how do i convert gallons of water in a 4 x 4 tank to water pressure to supply a toilet bowl? 4 x 4 x8 ft high x weight of water, gives me a number. convert to water pressure.

To most toilets, except those with power flush, yes the volume of water provides the answer to the completeness or quality of flush. The answer to this would usually be stated in volume, gallons or liters. But the original poster doesn't appear to care about the quality of flush, only the pressure available to the toilet.

Personally, having many years of experience in the use of toilets, I don't give much consideration to the quality of flush, the available pressure or other engineering/scientific type stuff. I prefer a warm seat, a quality double ply paper and most of all that the tank on the toilet is full. I know it is selfish of me but the toilet tank getting filled is the next guys problems. Also, I don't require a well stocked library either.

Good flushes! Old Salt

Hi Old Salt,

It was a pleasure to read all comments and learn that some people like to deviate the subject to another issues. Also, those deviations become arguments and finally some dirty expressions, which are permitted sometimes but not another moments. It's life at the start of the next winter. However, my "not fluent or free flowing English" gets better by learning all these deviations not reported in any statistical magazines or math classes.

Finally, we see that many people around the world have difficulties to perfectly, not an error, what means the question, Gil.

No one even asked what type of toilet you were trying to flush. 1 cubic foot = 7.480 519 480 5 gallon [US, liquid] Your tank will hold 957 US gallons when full. What are you trying to do, find out how far Jerry walked if he had size 12 red shoes. Ask Little Receive Little!

"No one even asked" the OP the height from the bottom of the tank to the flush valve either.

"What are you trying to do" go's both ways.

But though Ky may find it funny, this is how a 'homework' crack set a threads tone.

So thanks phil for setting a shining example of arrogant and belittling a-hole.

That's an awfully big flush...