Fresh PVC glue on the plumbing so yes there; fresh being 3 days old anyway. Yes on GFCI I believe, my Apex is hooked up to one of those expensive Triplite surge protectors. And it kept tripping every time my heater went on. So took UV off my apex (which was plugged into triplite). I tried one of those grounding probes years ago, and my clowns started acting very erratic and jerky. Took the probe out, clowns back to normal. I have gone down the rabbit hole with the grounding probes reading different "electricians" argue that on here, but my N of 1 has me wary of that option unfortunately.