Keeping water safe with anti-siphon devices
If the city water supply fails or your well pump fails while you are filling a chemical tank or if you are flooding your garden the hose will siphon the chemical tank contents or the garden water flood area into your home. It ultimately ends up in the water supply for your family and potentially your neighbors.
How to do it yourself
These are easily added to any hose bib for a few bucks, simply screw it on and tighten the set-screw on top that prevents its removal accidentally.
The photo on the left shows a hose bib without an anti-siphon device and the right photos shows a hose bib WITH the anti siphon device attached.