Foam In Water

I was getting some foam out of the cabin faucet so I went and cleaned all three faucets little screens. But I am still getting some foam out of the cabin faucet. This is happening even when on a water hook up. Any other ideas that you guys have tried?
Boat Name: Knot A Worry
2007 280 Rinker Express 6.2L B3
2007 280 Rinker Express 6.2L B3
Comments
2007 280 Rinker Express 6.2L B3
Dream 'Inn III -- 2008 400 Express