Air bleed / drain nipple and o-ring for Aquaflo XP, Waterway Executive, USA LX WUA series, and Aus LX LP & WP post 2022 pumps. You will need to measure thread on old pump, as we cannot confirm every make, model, or series these suit. 

Specifications:

• 1/4" MPT thread (~13mm OD)
• 3/8" (~9mm) barb for connection to air bleed or drain system.
• Threaded - screws into face of pump body in place of standard plug. 
• See images below, or scroll through them in the gallery.

Suits many:

• Davey QB2001, QB2002, QB2501, QB2502, QB3001, QB3002,
• some SpaNet, and
• some LX Whirlpool LP150, LP200, LP250, LP300, WP150-II, WP200-II, WP250-II, WP300-II pumps made after 2022. 
• some Watkins pumps made by LX