Hello! I am back for the first time in ages! Before you ready anything else, let me please state you can use this in any way you wish! All I ask is that if possible (I cant force you) to just give me credit in the description in the form of: Underground Disposal System/Sewer / www.planetminecraft.com/project/underground-disposal-system-sewer-100-functional-easy/

This is a 100% fully functional Item disposal system and sewer! It has two layers, one being the sewer and the other bring the maintenance tunnels.
You can build other concepts off this, or copy and paste it into your city!

Enjoy!