Pentair Sight Glass® 1-1/2" Slip | Sand & D.E. Filters | 50901600 Pool & Spa Lighting Filter Area 14

Filter Area 14

This is the dark gray version of the vinyl ring with insert

After Shock is a chlorine reducer that is primarily used with Stain Solution #1

The compact 9" length and 5 5/16" outer diameter slot precisely into the filter housing

Pentair Sight Glass® 1-1/2" Slip | Sand & D.E. Filters | 50901600 Pool & Spa Lighting Filter Area 14OEM Replacement Sight Glass for Sand and D. E. Filters The Pentair Sight Glass (50901600) is the OEM replacement 1 1 2" slip sight glass for Pentair sand and D. E. filters. If your existing sight glass is cracked, cloudy, or leaking, this is the direct replacement part. What It Does The sight glass provides a visual inspection port on the filter's multiport valve or plumbing assembly, allowing you to observe water flow and clarity during backwash and