Master Plumbing in Oxygen Not Included: The Ultimate Guide

Let’s be honest: there is nothing more frustrating than watching your carefully crafted colony drown because a single pipe burst or a pump failed at the wrong moment. If you are staring at a mess of leaking water and red error icons, you are not alone. Many players struggle to understand the fluid dynamics in this complex simulation.

In this guide, we will break down exactly how to set up plumbing in No Oxygen Included so you can move from chaotic flooding to efficient, automated liquid management. Whether you are trying to cool down your reactors or just keep your dupes hydrated, mastering these mechanics is the key to long-term survival.

Understanding the Basics of Fluid Dynamics

Before you place a single pipe, you need to understand how liquids behave in Oxygen Not Included (ONI). Unlike real life, fluids in ONI follow specific game logic rules that, once understood, make engineering much easier.

Pressure and Flow Rates

Every liquid source has a specific output rate, measured in kilograms per second (kg/s). For example, a standard Water Sieve produces 5 kg/s of polluted water. If your output pipe cannot handle that flow, pressure builds up, leading to blockages or bursts.

• Standard Pipes: Can handle up to 10 kg/s.
• Insulated Pipes: Also handle 10 kg/s but prevent temperature exchange.
• Gas Pipes: Do not mix with liquid pipes; they are separate systems.

Pro Tip: Always check the “Flow Rate” overlay in the game. If a pipe segment turns red, it is overloaded. You must split the flow using bridges or multiple outputs.

Temperature Matters

Liquids retain their temperature as they move through pipes unless they pass through an insulated pipe or a heat exchanger. This is crucial for cooling systems. If you pump hot water into a cold room without insulation, you will heat up your entire base.

For more detailed scientific context on thermodynamics in gaming simulations, you can refer to general principles on Thermodynamics.

Step-by-Step: How to Set Up Your First Plumbing Loop

Setting up a basic water loop involves three main components: Intake, Processing, and Output. Here is a concrete example using a simple Water Purification System.

Step 1: The Intake (Polluted Water)

Start by placing Liquid Vents or Pumps where your polluted water accumulates.

• Use a Liquid Pump if the water is pooled in a low area.
• Set the pump threshold to 100 kg. This prevents the pump from running dry and wasting power.

Step 2: Transportation

Connect the pump to a Water Sieve using standard pipes.

• Ensure the pipe path is direct. Long, winding paths increase the chance of lag and visual clutter.
• Use Pipe Bridges if you need to cross other utility lines. Remember, liquid bridges only allow flow in one direction.

Step 3: Processing (The Water Sieve)

The Water Sieve requires two inputs:

1. Polluted Water: From your pump.
2. Sand: Delivered via conveyor rails or auto-sweepers.

Configure the sieve to output clean water. Note that the sieve generates sludge as a byproduct. You must account for this solid waste in your design, or it will clog your system.

Step 4: Storage and Output

Direct the clean water into a Liquid Reservoir.

• Set the reservoir capacity to 10,000 kg for early-game bases.
• Connect a second pump to the reservoir to distribute clean water to sinks or electrolyzers.

Advanced Techniques: Managing Heat and Pressure

Once you have the basics down, you will encounter issues with overheating pipes or pressure locks. Here is how to solve them.

Using Insulated Pipes

Insulated pipes are essential when moving liquids across different temperature zones. For instance, if you are moving coolant from a space heater to a reactor, use insulated pipes to ensure the cold liquid stays cold.

Preventing Pressure Locks

A pressure lock occurs when gas gets trapped in a liquid pipe, blocking flow. To prevent this:

1. Always place Liquid Vents at the highest point of your system.
2. Use Gas Vents above liquid reservoirs to let escaping gases escape safely.
3. Avoid creating “U-bends” in your piping where gas can accumulate.

Common Mistakes to Avoid

Even experienced engineers make these errors. Here is what to watch out for:

• Ignoring Sludge Buildup: Water Sieves produce sludge. If you don’t have a plan to remove it (like a solid conveyor system), the sieve will stop working.
• Overloading Pipes: Connecting too many sources to a single pipe segment. Always use Pipe Elements to split flow if you exceed 10 kg/s.
• Neglecting Power Consumption: Pumps and sieves consume significant power. Ensure your battery backup can handle the load during peak usage.

FAQ: Frequently Asked Questions

Q1: Why is my water not flowing through the pipes?

A: Check for blockages. Gas pockets often trap liquid. Place a gas vent at the highest point of the pipe run to release trapped air. Also, ensure the pump is powered and has liquid to pump.

Q2: Can I mix hot and cold water in the same pipe?

A: Yes, but they will average out in temperature. If you need to maintain specific temperatures, use Insulated Pipes or separate loops. Mixing extreme temperatures can also cause steam explosions if not managed properly.

Q3: What is the best way to store large amounts of water?

A: Use Liquid Reservoirs. They act as buffers, allowing you to pump water in bursts rather than continuously. This saves power and reduces wear on pumps. For massive storage, consider digging out large natural cavities and lining them with impermeable tiles.

Q4: How do I move water uphill?

A: Liquid pumps can push water uphill, but they have a height limit based on pressure. For very tall structures, use a series of pumps with reservoirs in between to reset the pressure head. Alternatively, use Liquid Valves to control flow direction precisely.

Q5: Do I need insulated pipes for drinking water?

A: Not necessarily. If your base temperature is stable, standard pipes are fine. However, if your water passes through a hot biome (like Magma), use insulated pipes to prevent it from boiling before it reaches your dupes.

Q6: How can I automate my plumbing system?

A: Use Automation Wires connected to sensors. For example, place a liquid sensor in a reservoir. When the water level drops below 20%, it triggers the pump to turn on. When it reaches 90%, it turns off. This prevents overflow and saves power.

Conclusion

Learning how to set up plumbing in No Oxygen Included transforms your gameplay from a struggle for survival into a thriving industrial empire. By understanding flow rates, managing temperature with insulated pipes, and automating your systems with sensors, you can create efficient loops that support thousands of dupes.

Remember, start small. Master the basic water sieve loop before attempting complex geothermal cooling systems. Every expert engineer started with a flooded basement.

Did you find this guide helpful? Share it with your fellow colonists on social media or your gaming Discord server. Let’s build better bases together!