What is this? ( a plumbing question )
Found this under our bathroom sink. Any idea what it is, I don't recognize this device, some kind if a vent ? I see an arrow designating flow direction.
Thanks for any input.
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Found this under our bathroom sink. Any idea what it is, I don't recognize this device, some kind if a vent ? I see an arrow designating flow direction.
Thanks for any input.
14 Replies
- YEP........
That is an anti siphon-vacuum breaker device on the black tank flush system
Required to prevent cross-contamination
- Could be a combination vacuum break and check valve. Have one of those under my bathroom sink for the black tank flusher line.
- yes, vacuum breaker/anti back flow device....do you have a black tank flush system?
- Vacuum break
