2" Sight Glass for the following Pentair Backwash and Diverter Valves:
- Pentair HiFlow Valves (261049, 261050 and 261142 models)
- 2" PVC Push Pull/Slide Valves (261047 and 261165).
- Any other backwash, push pull or diverter valve that has a 2" threaded backwash port
- The Clear sight glass allows you to see when the water when backwashing your sand or D.E. filter to determine if the water is dirty or clear. Seeing the water enables you to determine how long to backwash your filter which will save time and water.