Replacement Filter Window
For 6" Clear View Filters with .480" Thick Window

Sight windows have a glass type coating over the polycarbonate that is very thin. This makes the window resistant to chemicals, solvants, & petrolium oils. The thin glass coating may crack over time because the coating does not flex or expand with the heat the same as the polycarbonate window does. Sight windows are very easy to change and is reconmended to have as a spare incase a crack develops in the coating. Filter window reatainers are engraved with a part number located near the center on the 6" filters or by the port openings on 4" filters that can be viewed through the sight window, this part number will reference the thickness of the replacement window