I have been using my dual beckett skimmer for over a year with no problems. A few days ago my collection container was full so it shut off the air flow through the skimmer. I shut down the skimmer for a day because I was painting and did not want the fumes to get sucked into the skimmer.

After I emptied the collection container and started up the pump again, I noticed the skimmer is now dumping tons, (I mean tons), of bubbles out of the 1.5" outlet. I took out both becketts and cleaned them, but to no avail. Everytime I turn it on, the bubbles come o' flyin. The skimmer is still working and when I open the air valves to the becketts the foam goes all way up the riser tube, (about 70"), but a massive amount of bubbles are also coming out of the outlet gate valve. Any ideas why this would be happening?