Background: This is for a science project I'm creating where I use an airpump connected to a sealed 5gal pail bucket to create a vacuum. That vacuum is then connected to water source to "suck" liquid into the bucket.
Problem: After I shut the airpump off, liquid continues to flow from the water source to the vacuum due to siphoning. Any lowcost ideas on how to prevent the siphoning from happening when I shut down the airpump? Preferably would like a passive solution, but if it has to be electronic, so be it. TIA!