Review on 💧 Oatey Sure-Vent AAV 1.5" 6 DFU Tubular Adapter (White) - One-Way Valve for Effective Plumbing Solutions by Brett Islam

If the drain is slow and ends up gurgling, that's a sure sign that the drain needs more ventilation. It'll make that drain, well, like no other drain. However, you will probably still need a few pieces of plastic drainage. You add about 6 inches of tubing length there, and the trap only has that wide range of adjustment. One of my drain fittings was directly behind the drain pipe and pointed straight into it. So I had to take a 45 degree angle to angle it sideways and a 90 degree angle to connect it to the trap. situations are different. In another case the sub section had a 1.25" connection which was fine as the trap etc is 1.25" BUT this kit is 1.5" which is standard for kitchen sinks. Bathroom sinks are 1.25 inches but usually adjust to 1.5 inches straight away, so this set will likely fit. But in my case when everything was 1.25", I had to get "creative" to adjust both ends of this kit to 1.25". So if you've never worked with sinks before, this isn't for beginners.