This is the wet end portion of a 2 HP Executive 2-1/2" suction, 56Y frame spa pump. This is basically a pump without a motor. This wet end is used with a 2 HP, 56Y frame, thru-bolt style motor. The motor used may be either a single speed or a two speed. The wet end may be rotated 90 degrees to change the discharge position. The inlet is standard 2-1/2" buttress and outlet is standard 2" buttress threads. See below for exact dimensions. This has a center inlet and side discharge. Features: Electrical: Used with 2 Horsepower motors Plumbing: 2-1/2" Buttress External Threads - Inlet (Approximately 3-11/16" actual outside diameter), 2" Buttress External Threads - Outlet (Approximately 3-1/16" actual outside diameter) Motor Type: 56Y Frame Thru Bolt