Many homes in Washington run a water softener, and the water it produces is handy inside the house. Outside, the same water can behave differently. Before you attach a garden hose to the nearest spigot, check whether that line is softened and decide what it should be used for.
Why softened water is different outdoors
A softener works by exchanging the hardness minerals in your water, mainly calcium and magnesium, for sodium. Public water in Washington is reported as very hard, so a softener here can add sodium to the water that reaches your kitchen, bathrooms, and laundry. Plants and lawns take water in through their roots, and many gardeners prefer to keep extra sodium out of the soil around their beds and grass. Softened water also carries a different mineral load than unsoftened water, so it is worth deciding deliberately where it goes.
Find out which outdoor spigots are softened
In many houses, the outdoor faucet is fed by a line that branches off before or after the softener, and the answer is not always obvious from the outside. A simple walk-through will usually settle it.
- Locate the softener and the main supply pipe where it enters the house.
- Follow the cold line from the softener outlet to the kitchen, bath, and laundry. Note any branch that heads toward an outdoor wall.
- Compare the outdoor spigot with the nearest indoor cold tap. Note whether the two draw from the same supply, using the softener manual or a licensed plumber if the layout is unclear.
- Mark each outdoor spigot as softened, unsoftened, or unknown with a tag or a note in your home records.
Choosing what the outdoor line should do
Once you know the layout, decide on a use for each spigot. A common approach is to keep one outdoor faucet on unsoftened water for watering gardens and lawns, and use softened water only for tasks where it makes sense, such as rinsing patio furniture or washing a vehicle. If your home has no unsoftened outdoor line, you can still water plants, but limit how much softened water goes onto the soil and watch how the plants respond over time.
Questions to answer before you change any plumbing
- Is the softener bypass set so that the outdoor line receives the water you expect?
- What happens to outside lines when the whole house is placed on bypass?
- Does the outdoor spigot have a backflow device, and is it in working condition?
- Does a new cold line for the garden need a permit, and who in your local building office can confirm that?
Hard water and iron still matter outdoors
If your outdoor water is unsoftened, it brings the hardness of the supply straight to the garden. Homes that draw from private wells in the river bottom area around Washington often see higher iron than homes on public water. Iron in water can leave orange staining on driveways, siding, and hose ends. A hose left connected to a spigot can also collect slime or mineral deposits at the nozzle. Run the water for a short time before filling a watering can, and rinse hose ends after each use so that deposits do not build up.
Test before you decide
If you have a private well, no one tests the water unless you arrange it, so a lab panel is the only way to know what is in it. A panel can measure hardness, iron, and sodium, and it can show whether bacteria are present. If you are on public water, the water report from your provider lists hardness and iron, and a lab can add sodium to the picture for the outdoor line. Ask the lab which panel fits a garden or sprinkler supply so that you order the right tests.
Keep a simple record
Write down which spigots are softened, which ones are not, and the date of any test you ran. Note any staining, unusual smell, or change in how plants look after watering. When plumbing changes or the softener is serviced, update the note. A short record like this helps the next person who works on the house, and it helps you choose the right tap quickly when the garden needs water.