This pump is a 1 1/2" which measures about 2 3/8" across the threads with Center Discharge Style 48 Frame Pump Wet End... This Motor is 115V with 2 Speeds and Is considered to be a 1.5HP with 13.5 A on High Speed and 4.7A on Low Speed...

The Waterway Center Discharge 48-Frame pump is the perfect replacement for most center discharge applications. It has reliable performance. It features 1-1/2" intake and discharge and a rotatable wet end for easy installation.

Spa Pump Features:

• Reliable center discharge performance
• 1-1/2" Intake and discharge
• Wet end can be rotated for easy installation
• Available in 0.75hp to 2hp and in single or dual speed (SEE THE AVAILABLE STYLES TAB)
• Dimensions (H x W x L): 7.35" x 7" x 14.00"
  
  Note: This new E-Series version replaces the old style Waterway center discharge pump

  Complete Pump Type	Portable Spa Pump
  Speed	2 Speed (2-Spd)
  Motor Voltage	115v
  Drain Plug Location	3,6,9 o`clock
  Pump to Motor Foot Types	15
  Suction Style	Center
  Suction Connection (Physical Dimension)	1-7/8"id, 2-7/16"od
  Suction Connection Type	Female Pipe Thread (fpt), Male Buttress Thread (mbt)
  Suction Pipe Size	1-1/2"
  Discharge Style	Center
  Discharge Connection (Physical Dimension)	1-7/8"id, 2-7/16"od
  Discharge Connection Type	Female Pipe Thread (fpt), Male Buttress Thread (mbt)
  Discharge Pipe Size	1-1/2"
  Horsepower	1.5hp
  Motor Frame	48 Frame Thru-Bolt
  Motor Amperage/Wattage	13.5A/4.7A
  Manufacturer	Waterway
  Pump Model	E-Series Center Discharge
  Manufacturer Impeller Number	310-8030
  Volute Fastening Type	6 Screws
  Volute/Sealplate Number	315-1070