Okay. Thank you. So there is no way to look down the pop up assembly to determine how high the water level is?One inch. Also if the level gets lower, so even if you don't catch the event, you can tell water got away.
https://www.amazon.com/Rectorseal-97402-Magic-Trap-Tee/dp/B002FY8ZIS/ref=sr_1_1 is a way you can put on an AAV for the bathroom and/or kitchen possibly DIY. You replace the existing slip joint trap with that, and you mount an AAV atop the vertical.