This means that if you need to run the hose 40′ underground, you want to buy a single 50′ hose. Trying to connect two hoses together works fine above the ground. It’s more practical and shorter hoses are easier to manage and store when not in use.
Nothing is worse than digging a trench for your hose only to find out that your hose is too short. Take the time to measure your project and be sure and get the right size hose to match the job. When in doubt, get the next size up.
As with almost anything in life, quality counts. Hoses are no exception. When you can, going with a thicker walled hose will only be beneficial in the future. This is especially true if you plan on burying it.