If you have a large shed you use for working on lawn tools or growing plants from seeds, you could probably use a water supply for washing your tools, watering plants, and washing your hands. You could run a hose from your house, but hooking up a faucet or sink would be a lot more convenient. Here's a look at a few things this would entail.
Digging A Trench
You can hook the pipes for your shed water into your home's plumbing system. First, decide if you need both hot and cold water or if cold water will be sufficient. A plumber can determine the best location to hook into the system. From that point, pipes are run to the shed. This requires a trench dug below the frost line so the pipe or pipes won't freeze in the winter. Before a trench is dug, your underground utilities have to be marked so they aren't disturbed. In addition, local codes will probably require that the trench be a certain distance away from other buried utilities.
Other things to consider when planning the trench include landscaping or a patio that might be in the way. You'll want a straight line when possible with the least disruption to your yard. Once you've found the perfect spot for the trench, you can rent a machine to dig it with minimal work if the plumber doesn't provide this service. However, you'll want to follow advice from the plumber when it comes to depth, pitch, and preparation of the trench.
Insulating The Pipe
A pipe that comes above ground and connects to the sink inside your shed or the hose bib outside it, is at risk of freezing in the winter if it isn't insulated or if your shed isn't heated. This requires wrapping the pipes to keep them from freezing. You may also want to prepare the shed plumbing for the winter by draining water from the pipe. With no water in the line, freezing won't be a problem. This is a good solution if you won't be using your shed in the cold months.
Installing A Drain
Depending on how you plan to use water in your shed, you may need a drain system. If you attach a spigot to the outside of the shed, you may just let water drain into the soil. If the water is connected to a sink inside, then you'll need a drain. If you're also installing a toilet, you'll need to hook up to the drain system of your house and should probably hire a professional plumber to do this. However, if you're only draining water from a sink, you might be able to drain it to a dry well that's filled with gravel so the water can filter through the well and into the soil.