I have a 2008 Beaver Contessa. I have a shurflu water filter. I am changing the water filter for the first time. I bought one at Lowe's that is practically identical to the one that was in previously. But, when I reconnect everything a turn the water on water comes out of the water filter unit. If I put the other filter that was in there before it works fine. Has anyone used a water filter other than one from Shurflo and have it work OK?