I'm in the middle of overhauling my perflex ec-50 filter. As I'm putting it back together I suddenly realize that I wasn't paying enough attention while taking it apart. I can't figure out which way the gasket goes. Here's a picture of a cross-section of the gasket:
What I can't figure out is whether the 'bump' goes up or down. Both ways fit nicely. Does anyone know?
Thanks for any help you can offer.