The 25mm (1") Heavy Duty flexible hose is black for easy concealment and this also discourages growth of algae on the inside, which can, long term, lead to a reduction in the hose diameter and thus affect the pumps performance.
2020/4/20· Heavy duty expanding hoses can do anything that a regular rubber hose can do. This means you can water the plants or the lawn, wash the car or the boat, spray the patio or your windows down, or supply water to any home improvement projects with these flexible hoses as opposed to traditional hoses.