---
title: How do the toilets function on board?
description: Toilets connect to the onboard treatment system. Only human waste and supplied toilet paper should be flushed.
---
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June 4, 2026
# How do the toilets function on board?
## Toilet functionality
*This Article Applies to all Adventure Canada Small-Ship Expeditions*
Expedition ship toilets operate using a vacuum system, similar to those found on airplanes. This system uses suction and minimal water to efficiently move waste through the ship’s plumbing and into an on-board sewage treatment system.
Because of this design, it is very important that only human waste and the provided toilet paper are flushed. Items such as paper towels, tissues, wipes, or any other materials can cause blockages and disrupt the system for multiple cabins.
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