Vacuum hose adapter

Hi. I’m wondering which threaded vacuum hose adapter I should get for this Hayward sp 1070 B skimmer. Most threaded adapters seem to top out at 1-1/2 inches but this hole is about 2-1/4. See photo. Thanks!

The adapter that should fit your skimmer is part number 7250A. http://www.inyopools.com/Products/00200017074679.htm

Thanks!

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