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[Neyvn]

So many times have I seen contrariety results about pressure and water.
Yes it goes up U bends, no it don't.
Sometimes they say that it was fixed and that water will look for a way up and out if there is one, Another time they say it don't...

What I want to do, is Build a Fortress that has a Water Container at the bottom but it feeds waterfalls and wells halfway up. At first I thought that I would be flooded if I do that and now when I decided to test it out, heck it don't work. Bah...

Am I doing something wrong or is it just not able to go up a pipe through the middle of my fortress...

|___|~~|___|           |~|
|___|~~|___|           |~|
|___|~~|___|_______|~|
|~~~~~~~~~~~~~~~|

(god I suck at that kinda art)

Edit: This is my first Time playing with Water Pressure... And I am more a Newb then a Noob, never gotten to my first siege before I start over for no reason...

Edit 2: Put pump in there by accident...

[redacted123]

-

[DanielLC]

When you want to do that ASCII stuff, put it in code brackets.

Does anyone know how to do BBCode escape sequences so I could actually write out code brackets?

[zchris13]

The wiki is pretty good for explaining it. Check it out. Let me go get some massive quotes from the thousands of times we have answered this question.  It's a good question, but everybody asks it. Almost as big as "my ramps aren't working".

http://www.dwarffortresswiki.net/index.php/Water_pressure

[AtomicPaperclip]

When you want to do that ASCII stuff, put it in code brackets.

Does anyone know how to do BBCode escape sequences so I could actually write out code brackets?

[trAPAVOID]
[TRAPAVOID]

That what you meant?

Just quote this message. Yay for learning to bypass filter on other forums.

[Jim Groovester]

Jim Groovester's somewhat accurate guide to water pressure:

1. Falling water is the cause of water pressure.
2. Water that falls onto other water will teleport to the lowest available unoccupied space.
3. Water will fill up to at most the level of its source. Screw pumps can be considered a source with respect to water pressure.
4. Water pressure is transferred only across orthogonal tiles, not diagonal.

I find the best way to study water pressure is to find a long underground river with its source on the map, and see how it operates. Try damming it at some places, just to see what happens. Try draining it into a chasm, just to see what happens.

[Neyvn]

Well you see I ran a series of tests and well...
None of them worked...

I dug a stairwell down about 5z near a brook then proceeded to build a fack base of the tower (smaller by nature but still having the desired pipe) I also wanted to make sure that water didn't boil away if it sat over magma (but not in gotta check that)

Even when I made the pipe going up those 5z and filled from the brook, it never rose above the lowest z. keck all it ever did was make waterfalls on the stairs so I am not sure what happened. I even left a few other tests alone to see what happened and never rose upwards. Ever...

I only ended up with water in the up pipe cause of an overflowing pump in the third test (nearly felt like flooding the world with that one)....

[zchris13]

fack

Do you mean fake? Or maybe facsimile?
Model most likely would have been a better word.

EDIT: Toady explains water pressure.

Water doesn't have to fall. Just has to be above.
Magma boils while in contact with magma, producing obsidian.  The basis for many traps.  Will not happen if there is a floor in between.

Water will not "push" other water up, if for example, it flows across a plane into a shaft that leads up.  It will not build up above the original level.


Say you have a pipe.  This pipe had water flow into it.  The water has stopped flowing.

                        ≈≈≈≈≈  ▼ ≈≈≈≈≈This is the source level. There is a river here.≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈|
Dry |                           |≈|
  |≈|___________________________|≈|
  |≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈≈|

[Skorpion]

Ohhh, the max is one below the original level?
THAT'S why my wells kept flooding! The contents of the trade depot flowed out the nearest exit, which was the well area on the level of the brook's water, and two below the depot!

Of course, toady needs to implement fluid compression, so we can make water cannons.

[zchris13]

Liquids don't compress.  I think the figures for water is some ridiculously small number at over a 100 atmospheres.

[Neyvn]

SO in other words, I gotta fill it from the top unless I have a water source that is above the pipes max height...
Bugger it...
I just didn't want to put a Pump Tower in the Fortress but looks like I am gonna have to redo my designs...

[Masennus]

When you want to do that ASCII stuff, put it in code brackets.

Does anyone know how to do BBCode escape sequences so I could actually write out code brackets?

[trAPAVOID]
[TRAPAVOID]

That what you meant?

Just quote this message. Yay for learning to bypass filter on other forums.

That's spiffy! I want to know why TRAPAVOID and TRAINABLE are filtered at all. Anyone know? It seems.... unnecessary at the least. Annoying at best.

However, I think the original asker wanted to know how to teach someone to use tags. I thought they would show up in a code block, but I just tried it and it didn't work...

[Shoku]

Liquids don't compress.  I think the figures for water is some ridiculously small number at over a 100 atmospheres.

That's actually not a problem. The extremely minor compression for water means that even that ridiculously small amount of compression on water holds a very large amount of pressure, which is what Skorpion is interested in.

SO in other words, I gotta fill it from the top unless I have a water source that is above the pipes max height...
Bugger it...
I just didn't want to put a Pump Tower in the Fortress but looks like I am gonna have to redo my designs...

Pumps sort of behave as a source above themselves and will fill water up to the same level.

-

Currently I'm setting up a glacial fort with some large cisterns that will be fed from the bottom but with various things supplied from the middle and using diagonals to keep wells from flooding.

[zchris13]

Liquids don't compress.  I think the figures for water is some ridiculously small number at over a 100 atmospheres.

That's actually not a problem. The extremely minor compression for water means that even that ridiculously small amount of compression on water holds a very large amount of pressure, which is what Skorpion is interested in.

SO in other words, I gotta fill it from the top unless I have a water source that is above the pipes max height...
Bugger it...
I just didn't want to put a Pump Tower in the Fortress but looks like I am gonna have to redo my designs...

Pumps sort of behave as a source above themselves and will fill water up to the same level.

-

Currently I'm setting up a glacial fort with some large cisterns that will be fed from the bottom but with various things supplied from the middle and using diagonals to keep wells from flooding.

Pumps have their own system.  They take a square of water from behind and below them, and teleport it to the nearest square that satisfies the pathing.  It only paths orthogonally(?)(▲▼◄►) and up and down, so no diagonals. I do not think it can path above its level. 

[AtomicPaperclip]

When you want to do that ASCII stuff, put it in code brackets.

Does anyone know how to do BBCode escape sequences so I could actually write out code brackets?

[trAPAVOID]
[TRAPAVOID]

That what you meant?

Just quote this message. Yay for learning to bypass filter on other forums.

That's spiffy! I want to know why TRAPAVOID and TRAINABLE are filtered at all. Anyone know? It seems.... unnecessary at the least. Annoying at best.

However, I think the original asker wanted to know how to teach someone to use tags. I thought they would show up in a code block, but I just tried it and it didn't work...

Just include a random color=white tag before the second letter, actually, the old method might work too

[TRAPAVOID], yes. scratch the color tags, just type