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Or I think it's new, and it's new to me. This hose-end system can take constant pressure with EZ-Flo's standard (excellent) warranty. So it can now be installed at the hose bib with the valves after it.

1:100, or 1.28 oz per gallon at Fast, 2.6 tbsp per gallon.

There's some discrepancy there as the new one has both charts, but specifically calls out the model number in the 1:400. The EZ-Flo online sheet (Click here for more information) has 100:1. I tend to believe the sheet.

In either case, even if it's 1:400, it's an alternative, but perhaps not a good one. Most irrigation systems have odd distribution patterns in places, so laying down kelp or whatnot wouldn't be even.

I'd never use it for herbicides, pre-emergents, or anything else. It's too inexact.

Yes, that would work. I know several folks who saw mine and ordered them, and then use them to water their pots as well with fertilizer-water. And their gardens.

Even the non-constant-pressure works fine for that since you'll turn the hose off when you're done.