Polaris Zodiac 3900 Chain Tensioner (39-120) lochinvar and a 3/4 inch orifice

and a 3/4 inch orifice

flap or diverter style

and this Balboa HAI Hi Volume Suction wall fitting is designed for compatible applications where the original fitting has worn out or no longer feels dependable

A lid like this is useful because it helps protect the strainer chamber while still allowing the user to access the basket area for cleaning and routine maintenance

Polaris Zodiac 3900 Chain Tensioner (39-120) lochinvar and a 3/4 inch orificePolaris Zodiac Chain Tensioner [3900] is a replacement part for compatible Polaris and Zodiac pool cleaner systems. This component helps keep the drive chain properly positioned so the cleaner can maintain steady movement during normal operation. When small cleaner parts wear out, even minor fit or movement issues can reduce cleaning coverage, create leaks, or cause the cleaner to move less reliably. Use part number 39 120 to help match this item to