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Water column to cooler holds BF preventer open, allowing sprinker and swamp cooler line to backfeed. That makes sense. In my defense, the same exact thing would happen if I had connected to a hose bib as mr. ace hardware expert said. The column of water would have just taken a round about way...

Yes, a fixture on my roof is attached to the input side of the backflow preventer. Most people seem to just attach it to a hose bib. No backflow prevention. The water inlet in the cooler is higher than the water reserve pan, so it cannot siphon that water. Just the water in the line. That...

I connected my swamp cooler to the the test port on my FEBCO 765 backflow preventer. It has a 1/4 flare connection. When I was buying parts the "resident plumbing expert" kept telling me it was the "last thing I'd ever want to do". He didn't have an reason, so I marched ahead. Is this bad...

Homebrew forum myself.

HI- new to the site. Big thanks for any help. I am redoing my bathroom. I bought Moen Commercial 8342 http://www.faucetdepot.com/pdfs/8342sp.pdf. I wanted the 3-port valve to be 2 discrete, 1-shared. It is 3 discrete (the .pf linked showed that, but not the site were I bought it...bummer)...