Durham - MD (Monday, October 18, 2010)
I had a problem with the Omni U25 Series E water filter leaking. Called Omni and they sent 3 o-rings the largest o-ring p/n OK-25-S6-05 seems to have fixed the problem. The o-ring that came with the filter was probably only 3/32 to 1/8' in diameter. The replacement o-ring was probably 1/4' in diameter which allowed the cannister to seal.