Quote:
Originally Posted by rohrmann
When you go looking for this valve, it is called an air admittance valve, not anti siphon. It acts like a conventional vent pipe that would exit the roof which allows air to follow waste down the drain.
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Bob - after spending (wasting?) some more time n the 'net, found that these gadgets are called Anti Siphon Trap Vent Device or an ASTVD. Makes sense since they prevent the sink trap from being siphoned dry, Under the sink is a regular 'S' or 'P' trap, depending on how on OEM plumbs the system and it's not a HEPVO like installed in the bathroom system. These are about 7 bucks or less at a big box store
That's my one new thing learned for today
Thanks to the folks that sent me on my quest