Waterway 2" Union Nut with 2" S Tailpiece and O-Ring - 400-5570

• The nut side is a 2" Buttress thread which measures approximately 3" in diameter and the tailpiece side is for 2" PVC piping.

Used for many 2" Spa Pumps. Those pumps are the following:

• Aqua-Flo XP2
• Waterway Hi-Flo

To Check Compatibility, Do the Following:

• Measure the outside diameter of your pre-existing pump union. 
• 400-5570 Pump Union has a 3 9/16" Outside Union Nut Diameter. 
• The Inside Diameter of your Pump Wet End measured is 3 1/16"