Spillover Spa Intake Fitting Options

I've got a small spillover spa with a 1.5" intake pipe in the side of the lower part. The intake was previously capped with one of these:

Amazon.com : Hayward SP1026 Vinyl/Fiberglass Inlet Fittings for Pools, Spas and Hot Tubs : Swimming Pool Maintenance Kits : Garden & Outdoor

The issue was that when everything was in "spa...

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