Sundance Hot Tub Plug

thingiverse

Sundance brand hot tubs typically have two holes, one on either side through which to wire them. Whichever hole you don't use, will typically come with a flimsy plug installed. To keep pests out, replace that flimsy plug with one of these. It stays in place well, but apply a little clear caulk to make it very snug. I used this on a Sundance 780 series, but I assume it will work on most anything, since the conduit is a standard size.