Quote:
Originally Posted by Catalina36
Ok, would someone explain to me about this anti siphon valve for the outdoor hose bib.
Never heard of this before.
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The plumbing code requires an outside hose bibb to have a vacuum breaker attached to it to prevent water from flowing backwards into the house and possibly contaminating the potable drinking water. This can happen when you attach a garden hose to the hose bibb and, for some reason, a negative pressure is created in the water pipe. The vacuum breaker is attached to the threaded hose bibb and secured by a set screw that is designed so that the vacuum breaker cannot be removed without damaging the set screw or the threads. Some people want to remove the vacuum breaker to prevent the occasional water splash that you get when you turn off the hose bibb. One way to minimize the splash is to make sure the hose sprayer is open when you turn off the hose bibb.