Rain barrel questions
I just set up 3 barrels connected in series. Two of the barrels are the typical blue kind with 2 bung holes in the top. I have the holes plugged with bungs to keep out bugs and debris--they're air tight.
I opened one of the bung holes yesterday and noticed a pressure escape sound. Should I be venting these? It appears that the water level is even across the 3 barrels, but where does the air go as they fill?
By the way, the barrels are 90% full after 2 days of rain. You got to love Seattle.