Water Tank

The Water Tank is a Stone tier multiblock for passively collecting moisture from the air and condensing it into usable water. The rate at which water is produced depends on the humidity rating of the Biome their center block is placed in and other environmental factors; 120% humidity yields the maximum 30 L/s of water, but that rate is halved if the Water Tank does not have sky access or it is snowing. Rain has the opposite effect, tripling the water production rate. The internal capacity of the Water Tank is 400,000L and it can auto-output to adjacent fluid tanks, fluid pipes, or even crafting stations at a maximum rate of 800 L/s. The Water Tank is superseded by the Water Pump in the Steam Age and later the EnderIO Reservoir in HV.

The Water Tank consists of a single type of casing and does not have a controller or any buses/hatches. The Multiblock Structure Hologram Projector also does not visualize or build the structure, but it is very easy to build by hand. Simply place the 26 blocks in a 3x3x3 (LxWxH) hollow cube as shown in the image above, ideally in a biome with high humidity to maximize water production. The current biome's humidity level (%) is displayed in the XML Info Overlay in the top left corner of the screen. Do not stack Water Tanks vertically or cover them with a solid roof because their production rate is halved without direct sky access. Transparent and semi-transparent blocks such as glass and fluid pipes do not obstruct the view.

Assuming iron rods are made with a file, a single Water Tank requires a total of 130 wood planks, 52 iron ingots, and 26 sticky resin to build. Later on, use rubber pulp instead of sticky resin to craft two water tank sidings per recipe, and cast iron instead of regular iron to craft four water tank sidings per recipe. The LV assembler recipes are even more efficient since they cost less wood and use fewer rods.

Structure

• 26 Water Tank Siding
• Mandatory Air: Interior of the structure

Wallsharing

As a Railcraft multiblock, the Water Tank cannot wallshare any part of its structure and must be at least one block apart from other Water Tanks to form.

The Water Tank does not require any power or fuel to run; water is passively generated for free over time. The rate at which water is produced depends on the humidity rating of the Biome and other environmental modifiers, as seen in the following equation. The floor operator rounds numbers down to the nearest whole number which means the final rate is always a multiple of 2.5 L/s, and the highest-humidity biome is the Temperate Rainforest, at 120%. Therefore, the absolute minimum rate is 2.5 L/s and the absolute maximum is 30 L/s without rain.

${\displaystyle {\displaystyle {\text{Water Production (L/s)}}=2.5\times \left\lfloor \max \left(1,10\times {\text{Humidity}}\times {\text{Environmental Modifiers}}\right)\right\rfloor }}$

The environmental modifiers listed below can either increase or decrease the rate of water production. Note that sky access simply means that at least one block can see the sky. Transparent and semi-transparent blocks such as glass, fluid pipes, and even ArchitectureCraft blocks are not considered obstructions and therefore can be placed above the Water Tank without incurring a penalty.

• No Sky Access = x0.50
• Snowing = x0.50
• Raining = x3.00

These values stack multiplicatively if multiple are true at the same time. For example, consider a Water Tank without sky access in a 90% humidity biome while it is raining outside. Its water production rate would be 32.5 L/s, as shown in the following function:

${\displaystyle {\displaystyle {\text{Water Production (L/s)}}=2.5\times \lfloor {\text{Max(1, }}10\times 0.90\times 0.50\times 3.00)\rfloor =32.5{\text{ L/s}}}}$.

The internal capacity of the Water Tank is 400,000L, which takes approximately 266 minutes to fill in a biome with 100% humidity and sky access. The current fill level is displayed in WAILA when looking at the Water Tank, or in the internal GUI after right-clicking it. Fluid data is stored in the bottom-center block, which means the tank does not lose its contents if that block remains intact.

The Water Tank automatically pushes water to connected fluid tanks or fluid pipes from any side except the top (max 800 L/s). The top is exclusively for receiving water from external sources. Right-click the tank with buckets, fluid cells, super tanks, or any other portable fluid container to immediately fill/empty them. Also try placing a Tinker's Crafting Station next to a Water Tank to easily refill fluid containers from inside the crafting grid.

Steam boilers placed next to the Water Tank automatically fill with water one at a time. See below for the maximum amount of coal or solar boilers that a single Water Tank can support at different humidity levels. At maximum heat, a small coal boiler produces 120 L/s of steam, a large coal boiler produces 300 L/s of steam, a simple solar boiler produces 120 L/s of steam, and an advanced solar boiler produces 360 L/s of steam.

• Despite their wooden appearance, Water Tanks are not flammable.