Prismapump

The Prismapump is a placeable block which you can purchase from. A set of 4 blocks costs one and s.

Usage
Upon placing down the Prismapump, placing down on any adjacent lateral side or on top of it will cause water source blocks to extend in that direction. The water will extend until it hits a block, runs off of a block or reaches the limit of 159 blocks. Water placed below the Prismapump will not be extended, although all other 5 sides will. This block makes building farms much simpler, as it eliminates the need to manually place water down a line.

Trivia

 * If the player has SkyBlock Addons installed, they have to disable the 'Avoid Placing Enchanted Items' function in order to place the block.
 * The water will still go on expanding until it hits a barrier, even after you broke the Prismapump.
 * There is no purpose to buying more than one batch of these, as you can easily break the Prismapump and use it again.