I thought it'd be a good idea to put an air vent at the top of the 120 gallon buffer tank I'm installing for filling and air removal. The manual mentions that some localities require vacuum protection so that the tank doesn't collapse. The tank has an extra 1.5" connection on top. I got a Taco air vent and some bushings, but now I'm thinking I should have a vacuum breaker as well. Would something like this do the trick: http://www.supplyhouse.com/Watts-0556030-1-2-LFN36M1-Lead-Free-Water-Service-Vacuum-Relief-Valve
![Vacuum Relief and Venting For Buffer Tank Vacuum Relief and Venting For Buffer Tank](/talk/proxy.php?image=http%3A%2F%2Fs3.supplyhouse.com%2Fimages%2Fproducts%2Flarge%2F0138457-3.jpg&hash=dbb759edd1fc8062e13bd867a74205d0)