Waterproof pipes were introduced in BuildCraft 2.2.0. Waterproof pipes can be used to transport oil, fuel, water and lava to different locations. These pipes allow liquids to be transported into engines, tanks and oil refineries. When a waterproof pipe is not connected to anything, the pipe will fill itself up instead of pouring the contents on the floor. Pipe Waterproof is crafted by placing cactus green into the middle space on a crafting bench. This is used to create Waterproof  Pipes.

All pipes except for obsidian pipe and diamond pipe can be turned into a waterproof pipe. A waterproof pipe is created by placing pipe waterproof on top of a wooden pipe, cobblestone pipe, stone pipe, iron pipe or gold pipe. Waterproof pipes will only connect to other waterproof pipes. They will not connect to transport pipes or conductive pipes

Wooden Waterproof PipeEdit

Wooden Waterproof Pipes allow any buildcraft compatible liquids to be extracted from a buildcraft compatible liquid storage container and into an adjoining buildcraft compatible pipe network. This is done by placing a running buildcraft compatible engine next to the wooden waterproof pipe.

Also allows you to connect Cobblestone Waterproof Pipes to Stone Waterproof Pipes and vice versa.

Wooden pipes can interconnect different type of pipes, but cannot connect to further wooden pipes; a normal cobblestone or gold waterproof pipe must be used instead.

Note that it is unnecessary to use a wooden waterproof pipe to extract liquids from pumps.

Cobblestone Waterproof PipeEdit

Cobblestone Waterproof pipe is a basic waterproof pipe. It has a regular capacity for liquids, and it can transfer buildcraft compatible liquids along a network of waterproof pipes.

This pipe will not connect to any stone waterproof pipes, similar to stone and cobblestone transport pipes not connecting.

Stone Waterproof PipeEdit

Stone Waterproof pipe is a basic waterproof pipe. It has a regular capacity for liquids, and it can transfer buildcraft compatible liquids along a network of waterproof pipes.

This pipe will not connect to any cobblestone waterproof pipes, similar to stone and cobblestone transport pipes not connecting.

Iron Waterproof PipeEdit

The iron waterproof pipe has up to five inputs and one output.

It will send all incoming liquids in one direction. The direction can be changed by right-clicking the pipe with a Wrench in 2.0.x. The output direction can also be changed by redstone current. Every time it either loses or gains redstone power, it will cycle to a different output. However, it will never output to a Wooden Waterproof Pipe. This combination of properties allows for players to accurately control its output direction from afar, via redstone wiring. In addition, this can be used to distribute liquids among multiple pipes by using a redstone clock. Players who have not mined enough redstone can simply use a Wrench.

Gold Waterproof PipeEdit

Gold waterproof pipes will transport more liquid than stone or cobblestone waterproof pipes. They do not need a redstone current to operate.

Emerald Waterproof PipeEdit

First available in BC 3.4.2 (for MC 1.4.7)

Emerald waterproof pipes will drain 4 times more liquid at once than wooden waterproof pipes.

Sandstone Waterproof PipeEdit

Available in BC 3.2.0 (for MC 1.3.2)

Sandstone waterproof pipes connect to other kinds of transport pipes, allowing stone and cobblestone waterproof pipes to connect, but will not connect to machines or any other blocks allowing more compact piping around machines.