Duct, tank, and manhole cleaners for pressure washers are specialized attachments and accessories designed to enhance the functionality of pressure washers for cleaning confined or hard-to-reach spaces. 
1. **Duct Cleaners**: These are attachments used to clean air ducts, ventilation systems, and other narrow spaces. They typically consist of flexible hoses with rotating nozzles that can navigate through tight spaces, dislodging dirt, dust, and debris. The high-pressure water jets effectively clean the interior surfaces of ducts, improving air quality and system efficiency.
2. **Tank Cleaners**: These are designed for cleaning the interior surfaces of tanks, such as water tanks, chemical tanks, and storage tanks. They often feature rotating nozzles or heads that can be inserted into the tank. The high-pressure water jets remove residues, sediments, and contaminants from the tank walls and bottom, ensuring cleanliness and preventing contamination of stored materials.
3. **Manhole Cleaners**: These are used for cleaning manholes, sewer lines, and underground utility spaces. They usually consist of robust, flexible hoses with specialized nozzles that can navigate through the manhole and sewer systems. The high-pressure water jets break down blockages, remove debris, and clean the surfaces, maintaining the functionality and hygiene of the sewer systems.
These cleaners are essential for maintaining hygiene, safety, and operational efficiency in various industrial, commercial, and residential settings. They help in reducing manual labor, improving cleaning effectiveness, and ensuring compliance with health and safety standards.