The 1.5 inch standard pump union is a universal pump union used for complete assembly of your replacement pump. Should fit any 1.5 inch end on most pumps.
The CoverMate I with Master Bracket is designed for 2014 and older Master Spas swim spas. The “Master Bracket” is designed to screw into the wood frame of the swim spa behind the corner. This gives your cover lifter a way more secure attachment to your swim spa!