Not showing anything there that needs to be pre-filtered.

Of course, if the distance from the plant is great, and the distribution is old and iron . . . that's a different matter.

You can do the white bucket test:
1. 5 gallon CLEAN white plastic bucket
2. 4 gallons of tap water
3. 1/8 cup of bleach
4. 1/8 cup of baking soda
5. Mix, cover, wait 24 - 48 hours
6. If there's colored sediment on the bottom of the bucket, you might want to pre-filter
.

Use Clorox bleach for this test; some cheaper bleaches might have small amounts of iron.