Vent tube modification for FW tank

mleekamp wrote:
Corkey, Yes, I saw those but ended up buying the standard VB that would screw on the end of a spigot. I bought a 3/4 adapter that will then screw in the VB, on on the other end of the 1/2 adapter is a "barb type" where I will place it in the vent hose, which is also 1/2. Will use a hose clamp to tighten it.

Sorry, don't know how to make it a live link.

Menards anti-siphon vacuum break. Note: I paid $6 but online it says $20. Go figure
http://www.menards.com/main/plumbing/rough-plumbing/valves/accessories/prier-anti-siphon-vacuum-breaker-and-backflow-check-valve-chrome/p-1847129-c-8626.htm

3/4 to 1/2 barb fitting. Again...I paid $4 not the price shown here.
http://www.menards.com/main/plumbing/rough-plumbing/pipe-tubing-fittings/fittings/hose-barb-fittings/3-8-x-1-2-pt-hose-barbs-4-pcs-box/p-1792414-c-8553.htm

I looked at those too, but settled on the one I linked to. It has to be installed at the "high point" so for me I was thinking in terms of maintenance. Using the hot water tank VB it would be easier to replace the breaker by simply unscrewing it rather then having to dismantle the assembly for replacement. As for how they work internally, it seems they mimic each other, so again, I'm anxious to hear how well yours works. :)