Dwarf Fortress Wiki - User contributions [en]

v0.31 Talk:Skill

2010-08-01T03:02:43Z

Dezbro:

== Migrants ==

You can get migrants at any skill level, in any skill. I've got strand extractors before discovering adamantium, and legendary migrants before they've done any work.

== Teacher/Leader/Student ==

Are these related to the new military training system, or are they something else, like a general ability to learn? Or is the dwarf's learning ability based on his attributes? Would a dwarf with high leader skill be better at running a fortress, or is that for running a squad? --Kydo 14:43, 3 April 2010 (UTC)

Toady said something about them being able to only teach weapon skills, and the general combat / dodging sort of abilities, so I don't think they have any other impact.

== Skill levels ==
Ok, I just took this from the 40d version, as I assume most of this wouldn't have changed, but I don't know how to check for the appropriate xp values. So far I think the order remained unchanged, except "No label" got replaced by "Adequate", and I'm relatively sure Dabbling through Competent are still correct, and Great through Legendary. I just put this here to reflect the "Adequate" change, and so anybody who knows how to check for the rest can update and put it into the wiki page, as it's lacking at the moment.
I added the question marks so people can remove them once they confirm the levels, and change the order if it is found to be different. --[[User:Ramperkash|Ramperkash]] 16:17, 6 April 2010 (UTC+2)

{| style="margin: 0 auto; border: 1px solid black; border-spacing: 0"
|-
| width="33%" style="border-right: 1px solid black;" |
{| width="100%"
! Level !! XP
|-
| Dabbling || align="right" | 1??
|-
| Novice || align="right" | 500??
|-
| Adequate || align="right" | 1100??
|-
| Competent || align="right" | 1800??
|-
| Skilled || align="right" | 2600??
|-
| Proficient || align="right" | 3500??
|-
| Talented || align="right" | 4500??
|}
| width="33%" style="border-right: 1px solid black;" |
{| width="100%"
! Level !! XP
|-
| Adept || align="right" | 5600??
|-
| Expert || align="right" | 6800??
|-
| Professional || align="right" | 8100??
|-
| Accomplished || align="right" | 9500??
|-
| Great || align="right" | 11000??
|-
| Master || align="right" | 12600??
|-
| High Master || align="right" | 14300??
|}
| width="33%" |
{| width="100%"
! Level !! XP
|-
| Grand Master || align="right" | 16100??
|-
| Legendary || align="right" | 18000??
|-
| Legendary+1 || align="right" | 20000??
|-
| Legendary+2 || align="right" | 22100??
|-
| Legendary+3 || align="right" | 24300??
|-
| Legendary+4 || align="right" | 26600??
|-
| Legendary+5 || align="right" | 29000??
|}
|}
:I can now confirm that the skill levels remained the same (up to Legendary at least), except that the "Adequate" prefix replaced the "No-label" one, and I still don't know how to test the xp values, might be able to check them in adventure mode. --[[User:Ramperkash|Ramperkash]] 17:26, 7 April 2010 (UTC)
::They appear to be unchanged when I look at them in Dwarf Therapist. [[User:Garanis|Garanis]] 17:42, 7 April 2010 (UTC)
:::This would not go on this page, it would go on [[experience]].--[[User:Albedo|Albedo]] 21:46, 7 April 2010 (UTC)

A list of skill descriptors on this page would be useful and this table is as good as any, though perhaps the numbers aren't needed here [[User:Cpad|Cpad]] 02:32, 10 April 2010 (UTC)

==Quality Skills==
I've been trying to compose a list of skills where level affects quality modifiers, versus skills where level is otherwise important, versus skills where level only affects speed.

Affects Quality:
Architect (cannot have mood)
Mason
Engraver (cannot have mood)
Mechanic
Carpenter
Bowyer
Siege Engineer
Cook
Trapper (for making traps)
Weaponsmith
Armorsmith
Blacksmith
Metal Crafter
Bone Carver
Stone Crafter (though, who cares, amirite?)
Wood Crafter (even more useless)
Leatherworker
Weaver
Gem Cutter
Gem Setter

Otherwise Important:
Miner (get all them gems)
Planter (for fat stacks)
All medical
All military
Judge of Intent
Appraiser

Just speed:
Organizer
Record Keeper
Soap Maker
All others

This seems pretty final now, so I'mma go figure out how to make a table on this wiki. --[[User:Zombiejustice|Zombiejustice]] 17:00, 13 April 2010 (UTC)

==skill penalties==
I'm pretty sure I've seen my legendary miners not dropping stone (or rough jewels, or ore), if they're exhausted, so it does seem to be a straight penalty. I'll add it to the article provisionally. Could someone else verify?

* Toady commented that as of 31.08, this should only apply to "starving" people (and presumably dehydrated) (comment at http://www.bay12games.com/dwarves/mantisbt/view.php?id=8). What have your mining experiences been in 31.08? -- [[User:Creidieki|Creidieki]] 05:34, 28 June 2010 (UTC)
**I was pretty confident that it was exhaustion, but it's entirely possible I mistook a brown arrow for a gray one.[[Special:Contributions/75.164.146.98|75.164.146.98]] 02:40, 27 July 2010 (UTC)

===Layout===
Could someone please edit the layout so that the skill levels is side-by-side with the skills available? Would make a much better page layout and easy reference at a glance. -[[User:Dezbro|Dezbro]] 03:02, 1 August 2010 (UTC)

v0.31:Soap

2010-07-29T15:43:11Z

Dezbro:

{{Quality|Fine}}
{{av}}
{{buggy}}

Soap is used by dwarves for both personal cleaning and health care.

Soap is made by combining {{L|lye}} and {{L|tallow}} in a {{L|Soap maker's workshop}}. This command must be entered through the Manager screen {{k|j}}-{{k|m}}-{{k|q}}; the workshop interface is empty. This is a bug that occasionally fixes itself after requesting soap through the manager screen.

One unit of tallow plus one unit of lye creates a single bar of soap. Only lye in barrels will be used, lye in buckets that has not yet been transferred into a barrel will not be used.

Dwarves do not require soap to clean contaminants such as mud and blood from themselves, and instead will use murky pools, artificial pools of water, brooks, or a {{L|well}}. It is possible to construct bath-houses (rooms containing pools of water, a soap stockpile, and perhaps a few nice statues) so dwarves living deep underground need not venture to dangerous cave pools or surface brooks to clean off a little mud or bloodstain. For cleaning wounds and preventing infection after {{L|surgery}}, however, {{L|hospital}}s should be kept stocked with a small amount of soap.

Soap can be stored in a bars/block stockpile.

== Bugs ==
Note that the dreaded "[animal] cancels clean self:Area inaccessible." message-spam stems from animals trying to clean themselves with soap, typically by putting it in their mouth. Sadly the only remedy seems to be to not produce soap, except for the hospital, soap stored there is safe from animals. Another workaround might be to only have soap in areas separated from animals by doors, but we know how well that works in the long run, don't we? Temporarily forbidding all soap bars through the stock menu seems to stop the madness and the culprits in question will wash themselves at a well or pool.

Now also occurs with dwarves. {{bug|1023}} Again, the remedy is to forbid soap until your dwarves clean themselves without soap.

v0.31 Talk:Rusty

2010-07-29T01:46:23Z

Dezbro:

More research needs to be done to figure out how long it takes for a skill to become rusty or very rusty and what effects rustiness has on the skill itself --[[User:Tyg13|Tyg13]] 21:46, 26 July 2010 (UTC)
: It probably reduced the effective level. Also my doctor that I started a fort with is rusty in his skills after about two years -[[User:Dezbro|Dezbro]] 01:46, 29 July 2010 (UTC)

v0.31:Aquifer

2010-07-28T02:52:44Z

Dezbro:

{{quality|Masterwork|08:00, 22 May 2010 (UTC)}}{{av}}
An '''aquifer''' is a subterranean layer of {{l|water}}-bearing rock or {{l|soil}}. Attempts to mine through them will result in the mined-out squares immediately filling with {{l|water}}, effectively halting excavation at or below their level. This, in conjunction with the fact that they are often located in areas rich in {{l|loam}}, and {{l|sand}}, makes it difficult to find great quantities of {{l|stone}} in areas with aquifers, making for more challenging gameplay.

Aquifers can't be drained - they are infinite. {{l|stone detailing|Smoothed}} aquifer stone stops producing water. Aquifers located in {{l|water#Salt_Water|saltwater}} areas will produce salty water. Aquifers do not only produce water - if the water is pressurized, an aquifer tile may instead absorb it. Just like with water production, this ability will not be disabled no matter how much water it absorbs.

== Where they are found ==
Aquifers are found in most {{L|soil}} layers and some porous rock layers. They often span several rock layers. They are recognizable at the embark screen by the {{Tile|≈≈≈≈≈|1:0:1}} to the right of that layer.

Layers which CAN contain aquifers:
*{{L|sandy clay loam}}
*{{L|silty clay loam}}
*{{L|loam}}
*{{L|sandy loam}}
*{{L|silt loam}}
*{{L|loamy sand}}
*{{L|silt}}
*{{L|sand (tan)|sand}}
*{{L|yellow sand}}
*{{L|white sand}}
*{{L|black sand}}
*{{L|red sand}}
*{{L|peat}}
*{{L|pelagic clay}}
*{{L|calcareous ooze}}
*{{L|siliceous ooze}}
*{{L|sandstone}}
*{{L|conglomerate}}
*{{L|puddingstone}}
Layers which CAN'T contain aquifers
*{{L|clay}}
*{{L|silty clay}}
*{{L|sandy clay}}
*{{L|clay loam}}
*{{L|siltstone}}
*{{L|mudstone}}

== Dealing with aquifers ==

===The ore method===
On maps where the aquifer is not held in a layer of soil, but instead is held in a {{L|sedimentary layer|sedimentary layer}} such as sandstone, it may be possible to tunnel down through deposits of ore such as magnetite. For this to work you have to find a spot where there is coincidentally an ore deposit on each Z-level you need to dig through. This is only possible through tiresome trial and error, or through the use of a utility like reveal.exe.

===The magma/obsidian method===
If you have access to a supply of magma, you can create your own obsidian caissons. By channeling into the aquifer layer and then filling these channels with magma, it is possible to create a wall of obsidian between your working area and the {{l|water}}-bearing rock or {{l|soil}}. However, changes to world generation with the last version have made this method more difficult than it once was, as it is now harder to find magma vents that extend above the aquifer level.

===The cave-in method===
If there are enough layers above the aquifer, then letting non aquifer rock fall into the aquifer layer gives an area of dig-able rock. This requires at least 2 natural dry layers. If multiple aquifer layers are to be breached, things get more complicated. First {{l| channel}} out the area of aquifer that will be replaced. Then dig out all connecting floors and walls to the block that will fall (build a support to hold it until you are ready for collision). A {{l| burrow}} may be useful to assign unnecessary dwarves to a safe area. When everyone is clear, de-construct the support with a lever. (If you forgot to bring stone, then you may instead build a constructed floor to support it, designate it to be destroyed, and have a {{l|hospital}} standing ready in case the unlucky one survives.)

After the collapse, do not dig out the outer edge of the fallen rock.

This does not work with {{l| wood}} walls since they deconstruct on cave-in.

If you build many rings inside one another in your top drop layer, you can breach multi-level aquifers with as little as 2 natural layers of dry soil above it. Drop the rings from the outside to the inside using constructed arms to hold the center rings in place. Once a ring drops into the water below it, pump out the water in the center and dig down another layer. When that is complete, drop the next ring and continue the process until you are through. Since you start dropping rings from the outside it is necessary to know how many levels deep the aquifer is before you begin.

'''Note:'''There is a bug that may prevent this method from working, collapsed layers may turn into the aquifer layer type that the layer lands on.

===The freezing method===

If you are playing in a freezing or very cold landscape, where it snows in winter and instantly freezes water on the map, you can dig out a 3x3 hole in the ground using {{l|channel}}s, and make it deeper and deeper until you reach the aquifer level. Once you reach the damp rock, tunnel into it with an up/down staircase - the incoming water will freeze after a few moments. The central square of the 3x3 hole should be tunnelable ice, so you can get to the rock beneath. If there are two aquifer levels, for example, you can just make a larger initial hole, and make a smaller one for the level after.

If your fortress is in a zone that gets warm, build walls around the inside of the hole to stop the water coming in once the ice melts.

Note: There is a bug that may prevent this from working, sometimes ice walls don't produce an ice floor tile above them, instead leaving it as "open space" which prevents the player from digging downwards. <s>To correct that, set the tile 1 z-level '''ABOVE''' your missing ice floor tile as a {{l|pond}}, and '''FILL IT'''. The first {{l|bucket}} of water that goes on it will create that missing ice floor tile the instant the water is dumped on it, and you will receive a cancellation message that the pond has gone away. Dezone the pond {{l|activity zone}}, and get back to work breaching that ice. Keep in mind that you will need an '''unfrozen water source''' to use to fill your bucket, so have a working {{l|well}} or underground pond ready beforehand for this to work.</s>
While the above will work, a much better method is to construct a wooden (or stone, if you have any) floor and then remove it. After the floor is removed, a natural ice floor will remain.

===The pump method===

The pumping method uses multiple {{L|screw pump|pumps}} to keep an area dry long enough to smooth or {{l|wall}} off the edges, stopping the flow of water. It requires no special environment or resources, other than wood and dwarves (and patience). Most commonly, a moderately sized section of the aquifer layer is channeled out and several screw pumps are built facing it. Directly behind each of the screw pumps a few tiles are channeled out to receive and dispose of the pumped water. When the pumps are activated, they should pump water faster than the aquifer can produce it, allowing masons to smooth or build walls around your future staircase. You ''will'' get job cancellations during this process, as stray 2/7's of water interrupt the building process. Just unsuspend construction when this happens, as long a dwarf manages to touch the wall before canceling, it will move incrementally toward completion and eventually finish. Depending on the availability of screw pumps and dwarves, you may need to wall off one corner or side at a time, then move the pumps and repeat. When drilling through more than one aquifer layer, be sure to leave yourself enough room to build additional layers of pumps and water disposal channels on lower levels.

Things to consider:
* Flowing water will cause parents to drop their infants, leading to job cancellations and occasionally [[fun]].
* Mechanical {{l|power}} may come in handy, but dwarf power works just fine and is much more portable.
* Channels can sometimes be used in place of walls, causing water produced by by the aquifer on one level to immediately fall and be consumed by the aquifer on the level below.
* This method may take a while.
* Aquifers do not create water in diagonal tiles, but do create water in hollow tiles directly below them. Therefore, you will want to dig two z-levels below the lowest aquifer layer before continuing with your fortress.

===The modding method===

By editing the the raws and removing the [AQUIFER] tag from all of the appropriate entries in inorganic_stone_layer.txt and inorganic_stone_soil.txt it is possible to remove all aquifers from the world. Make sure you do this before creating a new world to play on. ''(Then again, why not just embark on a place that isn't all aquifer... what are you looking for, [[adamantine]]?)'' Some might regard this method as cheating, however, so use it at your own risk.

===Breaking through to an existing space===

With a typical double-layer aquifer (with an unsafe layer beneath it that fills from above) it is not easy to push through a stairwell where you'd like, even if you have access to the space beneath. Start by ensuring 24 building materials (wood or stone) are available close by on the layer above the top aquifer, and that a ''large'' space (at least 25x25 or so, preferably larger) is available on the top safe layer under the aquifer, four layers beneath the first. Dig or build an up-down stair at the same position on the upper and lower safe levels, and surround the top up-down stair with 8 down-stairs for better access. Have at least three legendary diggers and half a dozen moderately skilled masons close by and idle. It also helps to have a stairway or open space leading down from the lower level to relieve water buildup at the point you'll make the hole.

Start by digging an up/down stairway upward from the bottom safe stairway into the bottom (third) layer. Water will start pouring out into the bottom level. Designate the next two squares up (on the aquifer levels) as up-down stairs to link the two, and wait until the diggers get started on them. Then designate a 3x3x3 block around these as up-down stairs on the two aquifer levels and the unsafe level beneath. Once they're built very large amounts of water will be pouring down into the lower space. ''Warning:'' unlike in the previous version, diggers now make a habit of cancelling designations that they feel they can't get to, such as if the lower level is too flooded for them to approach. Make sure all 27 up-down stairs are dug out ASAP. Then wall six squares on the top level (leaving two to be walled once the corners are filled in), and proceed downward from completed walls until you've walled squares on all three levels. After you finish, I'm not sure if it's technically necessary to construct up-down stairs in the space you dug out by designation in order to stop all water leakage.

===Going around===

If your embark site is covered by multiple biomes, there is a good chance the aquifer is not present in every biome. You might be able to dig down through a biome that doesn't have an aquifer, to a Z-level below the aquifer, and then (if you wish) tunnel beneath the aquifer to the previously inaccessible region.

Even if all the biomes of your site contain aquifers, they might not all be at the same Z-level. So you still might be able to dig down in one biome, reaching a Z-level beneath the aquifer in another biome.

{{World}}

[[Category:World]]

v0.31:Screw pump

2010-07-27T19:29:10Z

Dezbro: detailed desalination info

{{quality|Masterwork|08:00, 22 May 2010 (UTC)}}{{av}}

{{Machine_component|name=Screw pump|key=s|job=[[40d:Pump operator|Pump operator]]
|construction=
* {{L|Trap component#Enormous corkscrew|Enormous corkscrew}}
* {{L|Pipe section}}
* {{L|Block}}
|construction_job=
* {{L|Architecture}}
* 1 of
** {{L|Carpentry}}
** {{L|Masonry}}
** {{L|Metalsmithing}}
|power=Needs 10 power.
}}

A '''screw pump''' is a small {{L|building}} that can lift liquids ({{L|water}} or {{L|magma}}) from one level below onto the same {{L|Z-level}} as the pump. It is two tiles by one tile in size, and it can be either manually operated by a {{L|dwarf}} with the {{L|pump operator}} job or by being {{L|power}}ed by {{L|water wheel}}s and/or {{L|windmill}}s.

The direction you want the fluid to travel must be chosen at the time of construction. Pumping only occurs in a straight line, and involves a total of 4 tiles in a row - the liquid source, two for the pump, and the output. The "rise" in levels occurs on the first tile, the intake side, from one level below up to the level of the pump*. Pumped fluids can and will flow immediately after being pumped, as normal for that fluid. Pumped fluids will have a {{L|pressure}} equal to the exit {{L|z-level}} - a pump never "forces" water to a higher {{L|z-level}} than the output tile.

:''(* A DF pump can best be imagined as a simple [http://en.wikipedia.org/wiki/Archimedes%27_screw archimedes screw].)''

Salt water pumped through a pump will desalinate and become drinkable. However if the water then touches any natural water or tiles, smoothed or not, it will immediately be undrinkable again. So it is important to pump into a reservoir that is made entirely of constructed material. Please note that the block/tile underneath the reservoir-side of the pump also needs to be a construction.

''For a basic overview of how the different machine parts work and work together, see {{L|machinery}}.''

== Construction ==

Building a screw pump requires an {{L|Trap component#Enormous corkscrew|enormous corkscrew}}, a {{L|block}}, and a {{L|pipe section}}. The construction itself is completed in two stages. First a dwarf with the {{L|architect}} labor must design it. Then a dwarf (the same or a different one) with the appropriate labor must complete the building. This could be {{L|carpentry}}, {{L|metalsmithing}}, or {{L|masonry}}, depending on the material of the block.

It's important to choose the proper orientation for your pump, where it will draw water from and where it will deliver the water. This is determined before placement with the {{k|u}}, {{k|k}}, {{k|m}}, or {{k|h}} keys, and the text at the top of the sub-menu will change to confirm your choice. The default (as shown above in the sidebar), "pumps from the north" (top). The ''light'' green X must be next to the liquid source and the ''dark'' green X is where the liquid exits the pump. [[Image:Small pump.jpg|thumb|right|300px|'''Basic Side View of a Pump'''. This pump "pumps from the west", from left to right. The area to the right may fill to the top of that level, but no more (See {{L|pressure}}; see {{L|Screw pump#Pump Stack|Pump stack}}). Note that the entire space required is 4 tiles long by 1 tile wide, not including any retaining walls for the outflow. If pumped manually, the {{L|pump operator}} stands in the light-colored area, as the dark-colored is impassable to both fluid and movement. 
''(Although the "liquid" is shown as blue, this can work for {{L|magma|magma}} as well, with the {{L|magma-safe|appropriate precautions}}.)'']]
 
:{|style="font-family: monospace; font-weight: bold; font-size: 135%; border: 1px solid #0b0; background: #dfd"
|-
|style="color: #0f0; padding: 0"|X||style="color: #070; padding: 0"|X
|}
This example "pumps from the west" (left) to the east (right), the {{k|h}} option. If pumped manually, the dwarf stands on the light-colored tile, as the dark-colored is impassable.

The orientation is visible after placement by using {{k|q}}uery over or near that pump or during placement, using UMKH to select the direction of input. Orientation of a pump cannot be changed after being constructed, but, as with any building, it can be deconstructed into its component parts and rebuilt as and where desired.

Having specified the direction of travel, you must ensure that the source side of the pump is placed adjacent to and above (in the {{L|z-axis}}) a liquid. The screw pump will draw the liquid up from below its level, and distribute it out of the other side of the pump.

== Notes ==

* The source of the pump must be directionally adjacent to "Open Space" that is directly above a source of liquid. The adjacent space cannot be a floor, stairway or wall suspended over water. Screw pumps can pull water through a {{L|grate}}, floor {{L|bars}}, or a {{L|construction|constructed}} {{L|fortification}} on the Z-level below.
* The light pump tile is where a pump operator will stand (if the pump is not powered mechanically). Liquids to be pumped must be 1 level below the (empty) area adjacent to this tile.
* Dwarves must be able to access and stand on the light tile of the pump in order to build the pump and then to be able to operate the pump manually.
* The dark pump tile is on the output side. Liquids will appear in the tile adjacent to this.
* The dark pump tile blocks liquids flow and creature movement, and can be built into a wall to create a solid barrier. The light tile of the pump does not block flow or movement.
* Pumps can also be used in conjunction with a {{L|water wheel}} or a {{L|windmill}} to become self-powered.
* Active mechanisms connected to the pump will automatically start the pump; to prevent this either restrict liquid flow using floodgates or hatches, or put in a {{L|gear assembly}} linked to a {{L|lever}} to disconnect the {{L|power}}.
* Adjacent pumps ''automatically'' transfer mechanical power to any other adjacent pump(s), no {{L|axle}} or {{L|mechanism}} is required. If too many pumps are adjacent, there may be insufficient power to power them.
* A hatch above the input tile (on the same level as the pump) that is linked to a trigger (a {{L|lever}} or {{L|pressure plate}}) makes an effective on/off switch for that pump.
* In order to build pumps in a "hanging" state, as in the stacked screw pump example (below), one of its tiles must be able to connect to a nearby machine, either already existing or designated to be built. If, when the screw pump's construction is completed, the supporting mechanism has not yet been completed, it will promptly collapse into its component parts.
* Pumps do '''not''' push liquids '''up''' additional Z-levels above them. They only deliver water to their own level. That is, if you direct the output of a screw pump into a 1-square space surrounded by walls, the water will not "overflow" the walls. Consequently, a pump will refuse to move liquid if the level it is pumping to is completely filled. Higher levels can be achieved using a "pump stack" (below). (See {{L|Pressure}})
* In order to safely pump magma, you do not need to build a pump out of {{L|magma-safe}} materials, unless the open tile is going to be submerged in magma.{{verify}}
** Exception: Wooden parts {{L|wear}} out fairly quickly when used to pump magma, eventually causing the pump to break down into the non-wooden parts. This is due to the magma heating the adjacent tiles to a temperature at which wood takes heat damage.{{verify}}
* Magma, which normally has no pressure, will behave like pressurized when pumped. For example, when pumped into an U-turn, magma will come out at the other end. Normal (non-pumped) magma would just pool at the lowest level. This may be either very useful (can be used to build pressure towers for magma) or deadly (forge level flooded with magma, because someone tried to pump magma into a volcano).
* Pump's pseudo-pressure doesn't work across diagonals. If there is a diagonal-only passage in your tunnel, liquids will seep slowly through it, instead of bursting through above their normal maximal speed, like they would if there was good passage.
* Pumps do not pump up 1/7 liquid.
* If a pump's intake tile on the z-level below the pump becomes blocked (as with a cave-in or magma cooling into obsidian) the pump will still run but not pump any fluid.

====Common mistakes====
* Orienting a pump incorrectly, and/or not having a proper open liquid source.
* Pumping water into an area with a path to other parts of your fortress. (The pump may work perfectly - the fortress quickly [[40d:flood|flood]]s.)
* Expecting water to rise up above the same level of a pump.
* Building a wall attached only to the light tile - this leaves a diagonal leak between the wall and the dark tile unless sealed there. (If that's not a problem, don't worry about it.)
* Having stairs as input tile. Stairs block input tile, thus rendering the pump useless, even though liquids usually ignore stairs. Output tile can be any liquid-passable tile.
* Not channeling below the impassable tile of an individual pump in a pump stack. This is how power is transmitted to the pump below.

== Example layouts ==
=== Single Pump ===

[[Image:jt_screwpump.png|frame|left|A screw pump delivers from the level below to the tile in front. This pump pumps from the right to the left. The "dark tile" would be on the left - that entire tile is impassible to movement and fluids.]] 
=== Pump Stack ===
[[File:PumpStack2010.png|thumb|right|300px|'''Illustrated Side View of a Pump Stack'''.]]
[[File:PumpStackTopView.png|thumb|right|300px|'''Illustrated Top View of a Pump Stack Layer'''.]]
A Pump Stack is a method used to draw water or magma vertically across multiple z-levels requiring a minimum of parts. The basic functionality is possible because the Output (dark) side of the pump can be built over open space with a machine component located directly below, in this case another Screw Pump. Note that for power to properly transfer the intake (light) side of the pump must line up with the output (dark) side of the pump on the floor above it through a space in the floor, as in the illustration.

A pump stack minimizes the amount of machinery required to lift water or magma by allowing for power to be supplied directly to only the most accessible pump (typically the topmost) which in turn allows the player to operate a stack limited only by how many windmills/water wheels they can fit into the area.

Typical applications for a pump stack include moving magma from a lower level up to a convenient level for forges and furnaces, extracting water from a flooded fort, raising water for a decorative waterfall (and extracting it afterwards), or any other purpose that requires water/magma on a z-level significantly above its current location.

The Illustrated Top View of a Pump Stack Layer shows a basic section of a pump stack. Only the door (or a floodgate) on the Containment side is strictly necessary in order to prevent flooding. Two doorways are used here, each lining up with the solid ground within the pump assembly, in order to prevent workers from trapping themselves after digging channels or assembling the pump.

Be warned: pump stacks move water '''fast.''' If you are pumping from a large reservoir into an open area, be prepared for a huge outflow, roughly akin to the kind of water dump you'd get if the whole reservoir was balanced above the pump output and then released. If you are using pumps to empty a large underground reservoir (or, say, a flooded fortress) onto open land, use an aqueduct or some other method to make sure the pump system outlet is a good distance away from anything you wouldn't want to get drenched.

As an alternative to a large reservoir, it is also possible to combine a Dwarven Atom-Smasher with the top layer of the Pump Stack to create a "vaccuum cleaner" of sorts.

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