Lees Undergravel Knockout Plugs

Key Features

Fits Lees under-gravel filters
For when switching from an air pump to a power head
Useful anytime you need to remove an uplift tube from your filter plate

If you punch out too many knockouts on the under gravel filter, it will not function correctly.
Knockout plugs snap into the holes to cover them, restoring an otherwise inoperative filter plate.?
Fits Lee's Original and Economy Under Gravel Filters.

Lees Undergravel Knockout Plugs 4 Pack

Lees Uplift tube knockout plugs. Fits Lees under-gravel filters. Great for when you switch from an air pump to a power head, or any time you need to remove an uplift tube from your filter plate. Pack of 4 plugs for uplift tube holes.