For use in water-related applications, PETG filament is generally considered to be better than ABS filament. Here's why:
Water Resistance: PETG has excellent water resistance, making it suitable for applications where the printed parts will come into contact with water or moisture. It does not absorb water like ABS does, which can lead to degradation and reduced mechanical properties.
Durability: PETG has good durability and can withstand prolonged exposure to water without significant degradation. It maintains its strength and integrity when submerged, making it a suitable choice for water-related projects such as aquarium components, water pumps, or outdoor fixtures.
Chemical Resistance: PETG has better chemical resistance than ABS when it comes to exposure to water. It is less likely to be affected by water-based chemicals or detergents, which makes it suitable for applications that involve cleaning or exposure to water-based solutions.
Reduced Corrosion: Unlike ABS, PETG does not release corrosive substances when exposed to water. This makes it a better option for applications where the printed parts are in contact with metal components or where corrosion can be a concern.
It's important to note that while PETG has good water resistance, it may not be suitable for extremely high-temperature or high-pressure water applications. In such cases, specialized materials like PEEK or certain types of nylon might be more appropriate.
Overall, if you need to print parts for water-related applications, PETG filament is generally a better choice than ABS filament due to its superior water resistance, durability, and chemical resistance.