On 12/11/21 I coated both the plug and the plug hole per the PVC primer/cement directions. Place something flat and rigid underneath, because the primer is messy. Let that sit for a night. Placed a towel under the drain plug area, and partially filled the tub to the top of the filters on my Miami SaluSpa. Checked the next day. No leaks. Filled the tub and have enjoyed it since. No leaks 12/21/21.