No, it is not advisable to put water in a canister vacuum cleaner unless the vacuum is explicitly designed and labeled as a wet/dry vacuum. Canister vacuum cleaners are typically intended for dry use only and are not equipped to handle liquids.
If you put water in a regular canister vacuum cleaner designed for dry use, you risk damaging the motor, electrical components, and filters. Water can cause a short circuit, leading to potential electrical hazards and rendering the vacuum inoperable.
Wet/dry vacuums, on the other hand, are specifically designed to handle both dry debris and liquids. They have special features and safeguards that protect the motor and electrical components from water damage. These wet/dry vacuums have separate containers or compartments to hold dry debris and liquids, and they often come with specialized filters that can handle wet materials.
If you need to clean up spills or handle wet messes, make sure you use a wet/dry vacuum explicitly designed for that purpose. If you only have a regular canister vacuum, avoid using it for liquids to prevent damage and ensure its proper functionality.