Have HVAC Questions? Ask an HVAC Expert for Answers
I need to see a clear, well focused, well lit photo of the area you are talking about.
You can use the paper clip icon at the right end of the tool bar above, or the attach files link.
We can go from there without a time limit,
Thanks, ***** ***** the image, it took a while, the internet here had a slow down.
If you can feel threads inside that hole, a 1/2" or 3/4" pipe plug will work, do not over tighten it though, you will crack the plastic... use teflon tape pipe thread sealant.
If there are no threads in the hole, a 1/2 or 3/4" PVC pipe nipple with a cap on it will work. Use PVC glue, then try it for strength in 20 minutes,
We can go from here without any time limits.