I have noticed that my Multi port seems to be leaking into the section of 1.5" waste line. Because I keep that waste line valve closed off about 2 feet from the multiport, I can tell it fills with water over a period od several weeks. I also noticed that the water in the sight glass is yellow/green as though maybe the stagnant water in the waste line might be somehow leaking back in to the glass.
1- Is it normal to have that valve leak in to the waste line
2- Is it possible for it to back up in to the multi port sight glass or even the pool itself?
3- Am thinking I will change the spider gasket first
4- If it still does it, what else can it be?
Thanks for any advice