Waterway 2" x 2.5" Pump Buttress Thread Adapter

Waterway Executive 2" x 2.5" Pump Buttress Thread Adapter 

Use this fitting when replacing older Waterway Executive spa pumps that have a larger 2.5" intake/suction thread than the standard 2" discharge thread.

This Adapter screws onto any pump with a standard 2" intake / suction thread to 'convert' it to a 2.5" thread. 
This enables pump replacement without replumbing a new union

Can be used with the following pumps:
Waterway Executive Pump with 2" suction
LX LP and WP series pumps
Balboa SuperWow and Vico Ultimax pumps
Spanet XS series pumps 
Davey QB AUS series pumps (not standard QB series)
plus a number of other pumps with USA standard 2" buttress threads

** We have discovered that these are on occasion (ie sometimes they fit) too tight a fit on the following pumps, so should not be purchased to use with these pumps despite the thread type/size supposedly being the same:
Aquaflo XP, XP2 and XP2E pumps