Pentair Separation Bag Retaining Ring | Separation Tank SEP Series | 170099

The Pentair Separation Bag Retaining Ring (170099) is the OEM replacement retaining ring for the Pentair SEP Series Separation Tank, securing the separation bag in place within the tank assembly.

The retaining ring holds the separation bag securely inside the Separation Tank, ensuring the bag remains properly seated during operation. A failed or damaged retaining ring allows the bag to shift or unseat, compromising the tank's ability to separate DE waste from backwash water and potentially allowing debris to bypass the bag entirely.

Specifications

Fits Into

Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.

Pro Tip

This part is listed as "Not Shown" in the SEP Series parts diagram, which means it may not appear in the standard exploded view. When ordering, confirm part number 170099 against the parts list in your Separation Tank manual rather than relying on the diagram alone. If you are replacing the retaining ring, inspect the separation bag itself at the same time — a bag that has shifted or been compressed by a failed ring may also need replacement.