Thanks y'all. I found a piece of cut off pipe from when the sand filter was installed and it's diameter was 2 3/8 in, which means I have 2" PVC I think.
I replaced the grease caps 6 months ago. Is a plug different?
Anybody have a good video for showing the replacement process? I believe we can do it, but seeing a video might boost my confidence.
The air leak is out the top. I can hear it.
Sorry for the inaccurate vocabulary. Hoping to rebuild. I read on the forums that I didn't need to completely replace them, which would be a big mess but just replace the innards.