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2007 Optima 880 Series 1 Speed 230 Volt Replacement

How to Determine Spa Plumbing Size

Pump plumbing sizes are nominal, and not actual outside diameter (OD) of the threaded intake and/or discharge. Use a tape measure and check your old pump thread size against the sizing table

Plumbing Size      Pump Thread OD (approx.)
1 1/2 Inch               2 3/8 Inch
2 Inch                     3 Inch
2 1/2 Inch               3 5/8 Inch