Pentair Sight Glass® 1-1/2" Slip | Sand & D.E. Filters | 50901600 Pool & Spa Lighting This is the dark gray

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

This CS-301 is for the large 10-hole faceplate back position only and does not include the double-wall gasket

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

code-compliant propane combustion

Hayward Part Number SX200G UPC 610377054706 Fits Into

Pentair Sight Glass® 1-1/2" Slip | Sand & D.E. Filters | 50901600 Pool & Spa Lighting This is the dark grayOEM 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