Pentair Sight Glass® 1-1/2" Slip | Sand & D.E. Filters | 50901600 Pool & Spa Lighting The first and only flow

The first and only flow meter for pools and spas to be certified for outdoor use

Hayward Part Number SX200G UPC 610377054706 Fits Into

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

The Basic Manifold Kit covers the water-side manifold components (item nos

code-compliant propane combustion

Pentair Sight Glass® 1-1/2" Slip | Sand & D.E. Filters | 50901600 Pool & Spa Lighting The first and only flowOEM 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