There are many factors as to the limitation of hoses but it all boils down to a compromised pressure. Elevation changes may cause the pressure to drop thus a limited hose range is needed to maintain effectivity. Shorter hoses are not at risk for damage and will likely prompt you to take a look when the equipment suddenly does not function properly. It is exhausting to have a lengthy hose and will be challenging to move about. And lastly, water will have to travel longer and the waiting period could be lengthened with a longer hose.